Table of Contents
Quick Overview
Understanding the difference between Slow and Slowly is essential for clear, professional writing in American English. These two words are classic homophones-they sound almost identical in everyday speech, but they have completely different meanings and grammatical functions. Mixing them up is one of the most common spelling and grammar mistakes in the English language.
| Feature | Slow | Slowly |
|---|---|---|
| Meaning | Not moving or able to move quickly; taking a long time | In a slow manner; at a slow pace |
| Part of Speech | Adjective (standard), Adverb (informal speech) | Adverb (standard formal grammar) |
| Pronunciation | /sloʊ/ (one syllable) | /ˈsloʊli/ (two syllables) |
| Common Contexts | Describing things (slow train, slow internet) | Describing actions (drove slowly, spoke slowly) |
| Example | We were stuck behind a slow truck. | Please speak slowly so I can understand. |
| Memory Trick | Slow modifies a noun (a slow walker) | Slowly modifies a verb (walks slowly) |
Understanding "Slow"
A detailed breakdown of meaning, grammar, and usage.
Meaning
Pronunciation
Word Class (Adjective / Informal Adverb)
Grammar
Common Uses
Literal Meaning
Figurative Meaning
American English Usage
Typical Sentence Patterns
Common Collocations
Understanding "Slowly"
A detailed breakdown of meaning, grammar, and usage.
Meaning
Pronunciation
Word Class (Adverb)
Grammar
Common Uses
Literal Meaning
Figurative Meaning
American English Usage
Typical Sentence Patterns
Common Collocations
Key Differences
Core Definition
Slow describes what something is (an attribute). Slowly describes how an action is performed.
Part of Speech
Slow is primarily an adjective. Slowly is exclusively an adverb.
Formality
Slow as an adverb is informal. Slowly is the formal, standard adverb required in writing.
Pronunciation
Slow has one syllable (/sloʊ/). Slowly has two syllables (/ˈsloʊli/).
Comparison Table
| Feature | Slow | Slowly |
|---|---|---|
| Meaning | Not moving or able to move quickly; taking a long time | In a slow manner; at a slow pace |
| Part of Speech | Adjective (standard), Adverb (informal speech) | Adverb (standard formal grammar) |
| Pronunciation | /sloʊ/ (one syllable) | /ˈsloʊli/ (two syllables) |
| Common Contexts | Describing things (slow train, slow internet) | Describing actions (drove slowly, spoke slowly) |
| Example | We were stuck behind a slow truck. | Please speak slowly so I can understand. |
| Memory Trick | Slow modifies a noun (a slow walker) | Slowly modifies a verb (walks slowly) |
Grammar Rules
Grammar Rules & Mechanics
Understanding the specific grammatical functions of adjectives versus adverbs is the key to never confusing 'slow' and 'slowly' again.
Adjective vs. Adverb
'Slow' modifies nouns. 'Slowly' modifies verbs.
- Correct: We were stuck behind a slow truck.
- Incorrect: We were stuck behind a slowly truck.
- Correct: Please speak slowly so I can understand.
- Incorrect: Please speak slow so I can understand.
'Slow' is correct because it modifies the noun 'truck'. An adverb cannot modify a noun.
In formal writing, 'slowly' is correct because it modifies the verb 'speak'.
After Linking Verbs
When following a linking verb like 'is' or 'seems', use the adjective 'slow'.
- Correct: The internet connection is slow today.
- Incorrect: The internet connection is slowly today.
'Slow' is an adjective completing the meaning of the linking verb 'is'.
Imperative Commands
In short, informal commands, 'slow' is often used as an adverb. In formal writing, use 'slowly'.
- Correct: Drive slow through the neighborhood.
- Incorrect: Drive slowly through the neighborhood.
While 'drive slow' is extremely common in American speech and on road signs, 'drive slowly' is the grammatically correct formal version.
Comparative and Superlative Forms
'Slow' has comparative and superlative forms (slower, slowest). 'Slowly' uses 'more' and 'most'.
- Correct: He walks more slowly than his brother.
- Incorrect: He walks slowlier than his brother.
The comparative of 'slowly' is 'more slowly', not 'slowlier'. The comparative of the adjective is 'slower' (a slower walker).
When to Use "Slow"
Specific scenarios where 'slow' is the correct choice. In standard formal English, it is an adjective used to describe nouns. In informal speech, it is sometimes used as an adverb.
Describing Vehicles
Use 'slow' as an adjective to describe a vehicle that does not move quickly.
Example: We were stuck behind a slow tractor on the country road.
Describing Technology
Use 'slow' to describe devices, internet, or software that takes a long time to process.
Example: My computer is too slow to run this new software.
Describing People
Use 'slow' to describe someone who takes a longer time to learn or understand.
Example: He is a slow learner but he works very hard.
Pacing in Media
Use 'slow' to describe movies, books, or music that have a relaxed or delayed pace.
Example: The first half of the movie was a bit slow.
Business Periods
Use 'slow' to describe times when there are few customers or low activity.
Example: January is typically a slow month for retail.
Informal Commands
Use 'slow' informally as an adverb in short imperative phrases, often paired with 'down' or 'up'.
Example: You are driving too fast; slow down!
Describing Time
Use 'slow' to describe a period of time that feels like it is dragging.
Example: It has been a slow afternoon at the office.
Cooking Methods
Use 'slow' to describe culinary techniques that use low heat over a long period.
Example: I put the roast in the slow cooker this morning.
When to Use "Slowly"
Specific scenarios where 'slowly' is the correct choice. It is the standard adverb used to describe how an action is performed.
Describing Movement
Use 'slowly' to describe the manner in which someone or something moves.
Example: The old man walked slowly across the street.
Describing Speech
Use 'slowly' when asking someone to speak at a more understandable pace.
Example: The tourist asked the guide to speak slowly.
Describing Change
Use 'slowly' to describe a gradual process or transformation over time.
Example: The weather is slowly getting warmer.
Describing Actions
Use 'slowly' to modify any action verb, indicating it is done with care or at a low speed.
Example: She slowly opened the mysterious package.
Formal Driving Contexts
Use 'slowly' in formal or legal contexts to describe operating a vehicle at a low speed.
Example: The officer noted that the driver was proceeding slowly through the school zone.
Sensory Perception
Use 'slowly' to describe how something is perceived or realized mentally.
Example: It slowly dawned on him that he had made a terrible mistake.
Physical Reactions
Use 'slowly' to describe physiological changes or reflexes.
Example: The medication caused the patient's heart rate to drop slowly.
Beginning an Action
Use 'slowly' to describe the tentative start of an activity.
Example: The band slowly started to play their instruments.
Common Expressions
Idioms and standard phrases that rely on the specific meaning of each word.
Expressions with "Slow"
1. Slow internet
Meaning: An internet connection with low bandwidth or high latency.
Example: I can't download this file because the internet is so slow.
2. Slow train
Meaning: A train that makes many stops and takes a long time.
Example: We took the slow train to enjoy the scenery.
3. Slow learner
Meaning: A student who takes longer to grasp new concepts.
Example: The tutor specializes in helping slow learners.
4. Slow cooker
Meaning: A kitchen appliance that cooks food at a low temperature over many hours.
Example: I left the stew in the slow cooker all day.
5. Slow motion
Meaning: Video or film technique showing action at a slower speed than reality.
Example: The replay showed the catch in slow motion.
6. Slow dance
Meaning: A romantic dance to a slow tempo.
Example: They shared a slow dance at the wedding reception.
7. Slow service
Meaning: Unacceptably delayed attention in a restaurant or store.
Example: We complained to the manager about the slow service.
8. Slow pitch
Meaning: A type of softball where the ball is pitched in a high, slow arc.
Example: He plays in a slow pitch softball league on weekends.
9. Slow progress
Meaning: Advancement that is happening, but not quickly.
Example: We are making slow progress on the construction project.
10. Slow clap
Meaning: A deliberate, rhythmic clapping often used sarcastically or to build tension.
Example: The crowd gave a slow clap as the speaker finished.
11. Slow down
Meaning: A phrasal verb meaning to reduce speed or activity.
Example: You need to slow down and take a break.
12. Slow day
Meaning: A day with little activity or few customers.
Example: It was a slow day at the bakery, so I closed early.
13. Slow but sure
Meaning: A phrase describing steady, reliable progress regardless of speed.
Example: His method is slow but sure; he never makes mistakes.
14. Slow computer
Meaning: A device that takes a long time to process commands.
Example: I need to upgrade my RAM because this is a slow computer.
15. Slow economy
Meaning: An economic period with low growth and little trade.
Example: During a slow economy, businesses must cut costs.
16. Slow driver
Meaning: A person who operates a vehicle well below the speed limit.
Example: I got stuck behind a slow driver on the highway.
17. Slow start
Meaning: A beginning phase that lacks momentum.
Example: The movie had a slow start, but it got exciting later.
18. Slow roast
Meaning: A cooking method for meat using low heat for a long duration.
Example: The chef prepared a slow roast pork shoulder.
19. Slow heartbeat
Meaning: A medical condition or relaxed state where the pulse is low.
Example: Yoga helps maintain a slow heartbeat and calm mind.
20. Slow lane
Meaning: The lane on a highway designated for vehicles traveling at lower speeds.
Example: Stay in the slow lane if you are going under the speed limit.
Expressions with "Slowly"
1. Walk slowly
Meaning: To move on foot at a reduced pace.
Example: We walked slowly through the museum to see everything.
2. Speak slowly
Meaning: To talk at a measured pace for clarity.
Example: Please speak slowly so the international students can follow.
3. Drive slowly
Meaning: To operate a vehicle at a low speed.
Example: Drive slowly through the residential neighborhood.
4. Slowly but surely
Meaning: An idiom meaning progress is slow but steady and certain.
Example: Slowly but surely, we are paying off our mortgage.
5. Slowly fading
Meaning: Gradually losing color, strength, or visibility.
Example: The old photograph was slowly fading in the sun.
6. Slowly realizing
Meaning: Coming to an understanding over a period of time.
Example: I was slowly realizing that I had made a huge mistake.
7. Slowly recovering
Meaning: Gradually returning to health or normal state.
Example: The patient is slowly recovering from the surgery.
8. Slowly dripping
Meaning: Liquid falling drop by drop at a low rate.
Example: The faucet was slowly dripping, keeping me awake.
9. Slowly turning
Meaning: Rotating at a low speed.
Example: The ceiling fan was slowly turning in the heat.
10. Slowly sinking
Meaning: Gradually descending below a surface.
Example: The setting sun was slowly sinking into the ocean.
11. Slowly approaching
Meaning: Moving closer at a deliberate, unhurried pace.
Example: The storm clouds were slowly approaching the city.
12. Slowly changing
Meaning: Undergoing a transformation over a long period.
Example: Public opinion on the issue is slowly changing.
13. Slowly breathing
Meaning: Inhaling and exhaling in a calm, controlled manner.
Example: The instructor told us to focus on slowly breathing during yoga.
14. Slowly climbing
Meaning: Ascending at a gradual pace.
Example: The hikers were slowly climbing the steep mountain path.
15. Slowly deteriorating
Meaning: Worsening in condition over time.
Example: The historic building is slowly deteriorating due to lack of funds.
16. Slowly adapting
Meaning: Gradually adjusting to a new environment or situation.
Example: The expat is slowly adapting to the local culture.
17. Slowly scrolling
Meaning: Moving through digital content at a measured pace.
Example: She was slowly scrolling through her newsfeed before bed.
18. Slowly opening
Meaning: Unfolding or unsealing gradually.
Example: The heavy wooden doors were slowly opening for the guests.
19. Slowly dying
Meaning: Losing life or relevance over a long duration.
Example: The traditional art form is slowly dying out.
20. Slowly eating
Meaning: Consuming food at a relaxed pace.
Example: He was slowly eating his breakfast while reading the paper.
Collocations
Slow internet
Meaning: An internet connection with low bandwidth or high latency.
Example: I can't download this file because the internet is so slow.
Slow train
Meaning: A train that makes many stops and takes a long time.
Example: We took the slow train to enjoy the scenery.
Slow learner
Meaning: A student who takes longer to grasp new concepts.
Example: The tutor specializes in helping slow learners.
Slow cooker
Meaning: A kitchen appliance that cooks food at a low temperature over many hours.
Example: I left the stew in the slow cooker all day.
Slow motion
Meaning: Video or film technique showing action at a slower speed than reality.
Example: The replay showed the catch in slow motion.
Slow dance
Meaning: A romantic dance to a slow tempo.
Example: They shared a slow dance at the wedding reception.
Slow service
Meaning: Unacceptably delayed attention in a restaurant or store.
Example: We complained to the manager about the slow service.
Slow pitch
Meaning: A type of softball where the ball is pitched in a high, slow arc.
Example: He plays in a slow pitch softball league on weekends.
Slow progress
Meaning: Advancement that is happening, but not quickly.
Example: We are making slow progress on the construction project.
Slow clap
Meaning: A deliberate, rhythmic clapping often used sarcastically or to build tension.
Example: The crowd gave a slow clap as the speaker finished.
Walk slowly
Meaning: To move on foot at a reduced pace.
Example: We walked slowly through the museum to see everything.
Speak slowly
Meaning: To talk at a measured pace for clarity.
Example: Please speak slowly so the international students can follow.
Drive slowly
Meaning: To operate a vehicle at a low speed.
Example: Drive slowly through the residential neighborhood.
Slowly but surely
Meaning: An idiom meaning progress is slow but steady and certain.
Example: Slowly but surely, we are paying off our mortgage.
Slowly fading
Meaning: Gradually losing color, strength, or visibility.
Example: The old photograph was slowly fading in the sun.
Slowly realizing
Meaning: Coming to an understanding over a period of time.
Example: I was slowly realizing that I had made a huge mistake.
Slowly recovering
Meaning: Gradually returning to health or normal state.
Example: The patient is slowly recovering from the surgery.
Slowly dripping
Meaning: Liquid falling drop by drop at a low rate.
Example: The faucet was slowly dripping, keeping me awake.
Slowly turning
Meaning: Rotating at a low speed.
Example: The ceiling fan was slowly turning in the heat.
Slowly sinking
Meaning: Gradually descending below a surface.
Example: The setting sun was slowly sinking into the ocean.
Idioms
Slow and steady wins the race
Meaning: Consistent, deliberate effort leads to success, even if it takes a long time.
Example: Don't rush your studies; slow and steady wins the race.
Slow on the uptake
Meaning: Slow to understand or realize something.
Example: I had to explain the joke twice; he is a bit slow on the uptake.
Slow as molasses
Meaning: Extremely slow, moving at a frustratingly low speed.
Example: Traffic on the bridge is slow as molasses this morning.
A slow boat to China
Meaning: A very long and slow journey.
Example: Sending mail by sea freight is like taking a slow boat to China.
Slow off the mark
Meaning: Slow to react or start an action.
Example: The competitor was slow off the mark and lost the race at the start.
Slow burner
Meaning: Something that takes a while to become interesting or successful.
Example: The TV show is a slow burner, but it gets great by season two.
In the slow lane
Meaning: Operating at a lower speed or with less success than others.
Example: Our company is stuck in the slow lane while competitors innovate.
Go slow
Meaning: An organized labor protest where workers intentionally reduce productivity.
Example: The factory workers decided to go slow to demand better wages.
Slow roast
Meaning: To cook something slowly, or figuratively, to let a situation develop over time.
Example: Let's slow roast this idea before presenting it to the board.
Slow to anger
Meaning: Having a patient temperament; not easily provoked.
Example: The manager is slow to anger, which makes him great at handling complaints.
Slowly but surely
Meaning: Making gradual but certain progress.
Example: We are slowly but surely cleaning out the entire attic.
Slowly fading away
Meaning: Gradually disappearing or losing strength.
Example: The memories of that summer are slowly fading away.
Slowly losing grip
Meaning: Gradually losing control of a situation or one's mental faculties.
Example: The dictator is slowly losing his grip on the country.
Slowly coming to a boil
Meaning: A situation that is gradually reaching a point of crisis or climax.
Example: Tensions in the office are slowly coming to a boil.
Slowly turning the tide
Meaning: Gradually reversing the direction or outcome of a situation.
Example: The new medication is slowly turning the tide for cancer patients.
Slowly sinking in
Meaning: An idea or reality gradually becoming fully understood or accepted.
Example: The news of his promotion was slowly sinking in as he sat at his desk.
Slowly chipping away
Meaning: Making gradual progress on a large task by doing small amounts over time.
Example: We are slowly chipping away at the massive pile of paperwork.
Slowly dying inside
Meaning: Experiencing a gradual loss of joy, hope, or emotional well-being.
Example: Working in that toxic environment made her feel like she was slowly dying inside.
Slowly taking shape
Meaning: Gradually forming into a recognizable or complete structure.
Example: Our new marketing strategy is slowly taking shape.
Slowly but steadily
Meaning: Progressing at a low speed but without interruption.
Example: The river eroded the rock slowly but steadily over millennia.
Example Sentences
Easy
- The turtle is very slow.
- Please walk slowly in the hallway.
- My internet is slow today.
- He spoke slowly so the children could understand.
- We took a slow train to the city.
- The clock ticked slowly in the quiet room.
- She is a slow reader.
- The snail moved slowly across the leaf.
- It has been a slow day at the shop.
- The sun slowly set in the west.
- The slow cooker made the meat very tender.
- I slowly opened the heavy door.
- We were stuck behind a slow truck.
- She slowly ate her ice cream to make it last.
- The service at the restaurant was slow.
- He drove slowly through the rain.
- The slow music made me feel relaxed.
- The leaves slowly fell to the ground.
- I pressed the slow motion button on the remote.
- Time passed slowly during the boring lecture.
Intermediate
- The slow internet connection disrupted our video conference.
- The detective slowly realized the suspect was lying.
- We are making slow progress on the construction project due to the weather.
- She spoke slowly and clearly during the presentation to ensure everyone understood.
- The movie had a slow start, but the ending was thrilling.
- The old bridge is slowly deteriorating and needs repairs.
- He is a slow learner, but his dedication is unmatched.
- The hikers slowly climbed the steep mountain path to conserve energy.
- The restaurant received complaints about its slow service.
- The medication caused the patient's heart rate to drop slowly.
- January is typically a slow month for the retail industry.
- The crowd gave a slow clap as the controversial speaker took the stage.
- The dirty faucet was slowly dripping, keeping everyone awake.
- The slow economy forced many small businesses to close.
- Public opinion on the environmental policy is slowly changing.
- We enjoyed a slow dance at the charity gala.
- The ceiling fan was slowly turning, pushing the humid air around the room.
- He plays in a slow pitch softball league every Sunday.
- The truth about the corporate scandal was slowly emerging.
- The slow traffic made me late for the meeting.
Advanced
- The slow pace of bureaucratic reform frustrated the activists.
- The orchestra conductor signaled the musicians to play slowly and with profound emotion.
- Despite a sluggish start, the startup is slowly gaining market traction.
- The geopolitical landscape is slowly shifting as new alliances form.
- The philosopher was known for his slow, deliberate method of articulation.
- The jury slowly came to the realization that the evidence was purely circumstantial.
- The slow degradation of the historic monument prompted a massive restoration campaign.
- The novelist slowly built tension through meticulous character development.
- The slow but sure eradication of the disease took decades of medical research.
- The glacier is slowly receding due to the effects of global warming.
- The diplomat's slow response to the crisis drew criticism from the press.
- The rare artifact was slowly extracted from the archaeological site to prevent damage.
- The slow integration of new technology hindered the company's overall efficiency.
- The protagonist slowly descended into madness as the isolation wore on.
- The slow logistics chain resulted in severe supply chain bottlenecks.
- The artist's slow brush strokes captured the delicate nuances of the light.
- The regime is slowly losing its grip on the isolated nation.
- The slow erosion of civil liberties went largely unnoticed by the public.
- The therapist guided the patient to breathe slowly to manage the panic attack.
- The committee's slow deliberation ensured that every angle was considered.
Academic
- The researcher noted a slow decline in the cognitive function of the test subjects over a ten-year period.
- The data indicates that the tectonic plates are shifting slowly but consistently.
- The literature review highlights the slow evolution of feminist thought in the 20th century.
- The control group recovered slowly compared to the group receiving the experimental drug.
- The slow dissemination of information in the 18th century hindered revolutionary movements.
- The sociological study explores how cultural norms slowly adapt to technological advancements.
- The experiment demonstrates that certain chemical reactions occur slowly at room temperature.
- The archival records slowly revealed the hidden history of the indigenous population.
- The slow but steady accumulation of capital is fundamental to classical economic theory.
- The professor spoke slowly to allow students to transcribe the complex mathematical formulas.
- The ecological survey documented the slow recovery of the coral reef after the bleaching event.
- The linguistic shifts occurred slowly over several centuries of migration.
- The slow degradation of the radioactive isotope was measured using a mass spectrometer.
- The peer reviewers slowly recognized the validity of the novel theoretical framework.
- The thesis argues that the slow pace of legislative change reflects deep societal divisions.
- The manuscript was slowly decoded by a team of expert paleographers.
- The slow mutation rate of the virus made vaccine development more feasible.
- The historian slowly pieced together the events leading up to the revolution.
- The slow infiltration of groundwater into the aquifer is a natural filtering process.
- The psychological study observes how infants slowly develop object permanence.
Business
- The company experienced a slow quarter due to decreased consumer spending.
- The CEO spoke slowly to emphasize the importance of the new strategic direction.
- The software's slow processing speed frustrated the entire accounting department.
- The startup is slowly gaining market share in a highly competitive industry.
- We are making slow progress in our merger negotiations with the rival firm.
- The supply chain bottleneck slowly resolved as shipping lanes reopened.
- The slow adoption of cloud technology left the legacy business vulnerable.
- The manager slowly realized that the marketing campaign was failing.
- The retail store had a slow day, with only a handful of customers visiting.
- The corporate hierarchy slowly shifted to a more decentralized structure.
- The slow ROI on the initial investment worried the venture capitalists.
- The trainer instructed the new hires to navigate the software slowly to avoid errors.
- The slow turnover rate in the warehouse indicates high employee satisfaction.
- The company's reputation slowly recovered after the public relations crisis.
- The slow decision-making process at the executive level stifled innovation.
- The consultants slowly chipped away at the massive debt restructuring plan.
- The slow growth of the domestic market forced the brand to look overseas.
- The legal team slowly reviewed the 500-page contract for liabilities.
- The factory's slow production line was halted for immediate upgrades.
- Customer loyalty to the brand slowly eroded after the price hikes.
Real-Life Conversations
Office
Colleague 1: The server is running so slow today.
Colleague 2: Yes, it is taking forever to load these files.
Colleague 1: I will call IT. They usually fix these things slowly but surely.
Colleague 2: Let's hope so. This is making us all look like slow workers.
Restaurant
Customer: The service here is incredibly slow.
Waiter: I apologize, we are short-staffed today. I will bring your food slowly and carefully.
Customer: Just bring it when it's ready. We are not in a rush.
Waiter: Thank you for understanding. I will slowly clear these empty plates first.
Driving
Passenger: Why are we going so slow?
Driver: There is a slow driver ahead of me, and I can't pass.
Passenger: Try to slowly edge over to the right lane.
Driver: I'm trying, but traffic is slow as molasses right now.
School
Student: Could you explain that math problem again?
Teacher: Of course. Let me slowly go through the steps on the board.
Student: Thank you. I am a slow learner with algebra.
Formal vs Informal Usage
Professional Emails
In professional writing, 'slow' describes a delayed process, while 'slowly' describes the manner of an action.
Example: The slow approval process meant we had to proceed slowly with the rollout.
Legal Writing
Legal documents use 'slowly' to describe the precise manner of an action, and 'slow' for delayed timelines.
Example: The defendant slowly approached the bench, noting the slow pace of the judicial system.
Business English
Performance Reviews
In HR, 'slow' describes an employee's pace of work, while 'slowly' describes their method of completing tasks.
Example: He is a slow worker who executes his duties slowly to avoid mistakes.
Marketing
In marketing, 'slow' can describe a sluggish market, while 'slowly' describes a gradual shift in consumer behavior.
Example: The slow market forced us to slowly adjust our pricing strategy.
Academic Writing
Scientific Research
In scientific writing, 'slow' describes a low rate of reaction, while 'slowly' is the standard adverb for describing lab techniques.
Example: The slow reaction was observed as the acid was slowly added to the mixture.
Linguistics
In linguistics, 'slow' is an adjective describing speech tempo, while 'slowly' is the adverbial modifier.
Example: The subject spoke with a slow cadence, enunciating each word slowly.
Common Mistakes
He walks slow to school.
Correct: He walks slowly to school.
Why: In formal writing, you must use the adverb 'slowly' to modify the verb 'walks'.
The slowly train made me late.
Correct: The slow train made me late.
Why: 'Train' is a noun, so it must be modified by the adjective 'slow'.
My computer is running slowly today.
Correct: My computer is running slow today.
Why: While 'slowly' is grammatically correct, 'running slow' is a widely accepted idiomatic phrase in tech contexts. However, 'is slow' is better.
Please speak slow.
Correct: Please speak slowly.
Why: Use the adverb 'slowly' to describe how the verb 'speak' should be performed.
We are making slowly progress.
Correct: We are making slow progress.
Why: 'Progress' is a noun in this context, so it requires the adjective 'slow'.
The internet connection is slowly.
Correct: The internet connection is slow.
Why: After the linking verb 'is', you must use the adjective 'slow' to describe the noun 'connection'.
She is a slowly reader.
Correct: She is a slow reader.
Why: An adverb cannot modify a noun. Use the adjective 'slow' to describe 'reader'.
He drives more slow than I do.
Correct: He drives more slowly than I do.
Why: The comparative form of the adverb is 'more slowly', not 'more slow'.
The turtle moved slow across the road.
Correct: The turtle moved slowly across the road.
Why: Use 'slowly' to modify the action verb 'moved'.
It was a slowly day at the office.
Correct: It was a slow day at the office.
Why: 'Day' is a noun, so it must be modified by the adjective 'slow'.
Learning Tips
Memory Trick: The Noun Test
If the word comes immediately before a noun (like internet, train, day), use the adjective 'slow'.
Memory Trick: The Verb Test
If the word describes how an action is done (how someone walks, speaks, or drives), use the adverb 'slowly'.
The -LY Rule
Remember that 'slowly' ends in '-ly', which is the standard suffix for adverbs in English.
Formal vs. Informal
If you are writing an essay, email, or report, always use 'slowly' to describe actions. Reserve 'slow' as an adverb for casual speech.
The Substitute Test
If you can substitute the word with 'fast' and it makes sense, use 'slow' (a slow train / a fast train). If you can substitute it with 'quickly', use 'slowly' (walked slowly / walked quickly).
🎮 Mini Quiz
Test your knowledge with these interactive questions.
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Frequently Asked Questions
Quick answers to common questions.
What is the main difference between slow and slowly?
'Slow' is an adjective used to describe nouns (a slow car). 'Slowly' is an adverb used to describe verbs (drove slowly).
Why are slow and slowly so commonly confused?
In informal American speech, 'slow' is often used as an adverb (e.g., 'drive slow'), leading people to think it is grammatically correct in formal writing.
Can 'slow' and 'slowly' be used interchangeably?
No, they cannot. They have different grammatical functions. You use 'slow' for nouns and 'slowly' for verbs in formal contexts.
How do you pronounce the difference between slow and slowly?
'Slow' is pronounced /sloʊ/ with one syllable. 'Slowly' is pronounced /ˈsloʊli/ with two syllables.
Is it correct to say 'drive slow'?
It is common in speech and on road signs, but in formal writing, the correct phrase is 'drive slowly'.
Is 'slowly' an adjective?
No, 'slowly' is exclusively an adverb. It cannot modify a noun directly.
What is a good trick to remember which word to use?
Look at the word right after it. If it's a noun, use 'slow'. If it's a verb or you are describing an action, use 'slowly'.
What is the comparative form of 'slowly'?
The comparative form is 'more slowly' (e.g., He walks more slowly than I do). You do not say 'slowlier'.
Can 'slow' be used after a linking verb?
Yes, adjectives follow linking verbs. For example, 'The connection is slow' is correct.
Is 'slowly but surely' a standard idiom?
Yes, it is a very common idiom meaning that progress is being made at a slow pace but with certainty.
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