A1 adjective #379 mais comum 3 min de leitura

fast

Something that moves with high speed or happens quickly.

Explanation at your level:

Fast means moving quickly. Think of a rabbit or a car. If something is fast, it does not take a long time. You can say: 'The train is very fast.' Use it when you talk about speed.

At this level, you can use fast to describe things that move or happen in a short time. Common phrases include fast food or a fast runner. Remember, it is the same word for adjectives and adverbs.

Fast is used to describe high velocity or brief duration. You might use it in business contexts, like a fast-growing company. It is a very common word that helps you sound more natural when describing processes or physical movement.

At the B2 level, notice how fast functions in idiomatic expressions. Phrases like fast and loose or fast track add nuance to your speech. You should also distinguish between physical speed and metaphorical speed, such as a fast learner.

In advanced English, fast can carry connotations of intensity. Consider the phrase fast friends, which implies a strong, firm bond. Understanding the etymological link to 'firmness' helps you grasp why we use it in contexts that don't involve movement at all, like being fast asleep.

Mastering fast involves recognizing its historical evolution from 'fixed' to 'rapid.' In literary contexts, it can be used to describe things that are unyielding or secure. Its versatility is a hallmark of native-level fluency, where the distinction between its literal speed-based meaning and its archaic 'firm' meaning creates subtle, poetic layers in writing.

Palavra em 30 segundos

  • Fast means high speed.
  • It is both adjective and adverb.
  • Never add -ly.
  • Common in many idioms.

When you use the word fast, you are usually talking about speed. Whether it is a fast car zooming down the highway or a fast runner crossing the finish line, the word implies that distance is covered in a short amount of time.

It is important to remember that fast can also describe the duration of an event. For example, if a meeting is fast, it means it didn't take long. It is a very versatile word that fits into almost any conversation about time or movement.

The word fast has deep roots in Old English, specifically the word fæst. Back then, it didn't just mean quick; it meant firm or fixed. Think of a 'fast' color that doesn't fade or being 'fast asleep'—meaning you are firmly stuck in sleep.

Over centuries, the meaning shifted from 'firmly held' to 'moving with intensity.' It is fascinating how the idea of being 'firm' evolved into the idea of 'moving quickly' because something moving with great intensity is hard to stop or hold back. It shares roots with German fest, which still keeps that original meaning of 'firm' or 'solid' today.

You will hear fast used in many daily situations. We often pair it with nouns like fast food, fast lane, or fast track. It is a neutral word, meaning you can use it in a casual chat with friends or in a professional meeting at work.

Be careful not to confuse it with 'quick.' While they are synonyms, fast is usually used for physical movement, while 'quick' often describes a reaction or a short amount of time. However, in modern English, they are frequently interchangeable.

Idioms make language colorful! Fast and loose means acting without responsibility. Fast asleep means sleeping deeply. Play fast and loose is another version often used in business contexts.

You might also hear fast-talking, which describes someone who is persuasive but maybe a bit dishonest. Finally, in the fast lane refers to a lifestyle that is exciting and busy. These expressions show how fast is embedded in our culture.

The word fast is unique because it acts as both an adjective and an adverb without changing its form. You say 'a fast car' (adjective) and 'he drives fast' (adverb). You never add '-ly' to make it an adverb!

In terms of pronunciation, the British IPA is /fɑːst/ while the American IPA is /fæst/. It rhymes with past, last, cast, mast, and vast. It is a single-syllable word that usually carries the primary stress in any phrase it occupies.

Fun Fact

The word 'fast' meaning 'to not eat' comes from the idea of 'holding fast' to a religious rule.

Pronunciation Guide

UK /fɑːst/

Long 'a' sound.

US /fæst/

Short 'a' sound.

Common Errors

  • Adding -ly
  • Mispronouncing the 'a'
  • Confusing with 'first'

Rhymes With

past last cast mast vast

Difficulty Rating

Leitura 1/5

easy

Writing 1/5

easy

Speaking 1/5

easy

Audição 1/5

easy

What to Learn Next

Prerequisites

run car time

Learn Next

velocity accelerate rapidly

Avançado

fastidious steadfast

Grammar to Know

Adverbs of manner

He runs fast.

Comparative adjectives

Faster than.

Superlative adjectives

The fastest.

Examples by Level

1

The cheetah is fast.

Cheetah = big cat

Adjective

2

He runs fast.

He = boy

Adverb

3

The car is fast.

Car = vehicle

Adjective

4

They are fast.

They = people

Adjective

5

Is it fast?

Question

Question

6

It is not fast.

Negative

Negative

7

A fast bike.

Bike = bicycle

Adjective

8

Go fast!

Command

Adverb

1

The internet is very fast.

2

I like fast food.

3

She is a fast reader.

4

The fast train arrives at noon.

5

Don't drive so fast.

6

He wants a fast answer.

7

They need a fast solution.

8

The fast pace of the city.

1

The company is on a fast track to success.

2

He is a fast learner.

3

The meeting was fast and productive.

4

She has a fast metabolism.

5

They became fast friends.

6

We need to make a fast decision.

7

The fast lane is for passing.

8

Life moves at a fast pace.

1

He played fast and loose with the rules.

2

She was fast asleep when I arrived.

3

The economy is in a fast decline.

4

They are fast becoming the market leaders.

5

He is a fast talker when nervous.

6

The fast-moving storm caused damage.

7

We need a fast-acting remedy.

8

She has a fastidious, fast-paced routine.

1

The color is fast and won't wash out.

2

He held fast to his beliefs despite pressure.

3

The fast-paced nature of the industry is exhausting.

4

They were fast friends for over a decade.

5

The fast-forward button is broken.

6

His fast-talking style hides his lack of knowledge.

7

The fast-spreading news shocked everyone.

8

She is a fastidious worker with a fast rhythm.

1

The anchor held fast against the current.

2

He remained fast in his resolve.

3

The fast-fading light signaled the end of the day.

4

She was fast bound by her promise.

5

The fast-flowing river carved the valley.

6

He is a fast-witted debater.

7

The fast-changing political climate.

8

They are fast allies in this struggle.

Sinônimos

Antônimos

slow sluggish

Colocações comuns

fast food
fast lane
fast learner
fast asleep
fast friends
fast pace
fast track
fast recovery
fast approaching
fast-growing

Idioms & Expressions

"fast and loose"

irresponsible

Don't play fast and loose with the budget.

casual

"fast asleep"

deeply sleeping

He was fast asleep by 9 PM.

neutral

"fast friends"

close friends

We became fast friends at camp.

neutral

"fast track"

accelerated path

She is on the fast track to success.

neutral

"fast talker"

persuasive/deceptive person

He is a fast talker, watch out.

casual

"hold fast"

keep a firm grip

Hold fast to your values.

formal

Easily Confused

fast vs quick

similar meaning

quick is reaction, fast is motion

He is quick to react; he runs fast.

fast vs rapid

similar meaning

rapid is formal/process

Rapid growth.

fast vs swift

similar meaning

swift is elegant

A swift bird.

fast vs speedy

similar meaning

speedy is delivery/casual

Speedy delivery.

Sentence Patterns

A1

Subject + is + fast

The train is fast.

A2

Subject + runs + fast

He runs fast.

A2

It is a + fast + noun

It is a fast car.

B1

Subject + is + fast + asleep

She is fast asleep.

B2

Subject + is + fast + becoming

He is fast becoming a star.

Família de palavras

Nouns

fast a period of not eating

Verbs

fast to abstain from food

Adjectives

fast quick

Relacionado

fasten to make firm

How to Use It

frequency

10

Formality Scale

formal neutral casual slang

Erros comuns

fastly fast
Fast is already an adverb.
more fast faster
Use -er for short words.
most fast fastest
Use -est for short words.
fast as as fast as
Need both 'as' for comparison.
fastingly quickly
Fastingly is not a word.

Tips

💡

No -ly

Never add -ly to fast.

💡

Adjective/Adverb

It works for both.

🌍

Fast Food

Refers to burgers/fries.

💡

Rhyme

Rhymes with past.

💡

Fastly

Avoid this error.

💡

Fasting

Religious meaning.

💡

Flashcards

Use it in sentences.

💡

Mnemonic

Flying Across Streets.

💡

Fast Asleep

Deep sleep.

🌍

Fast Lane

Busy life.

Memorize It

Mnemonic

F-A-S-T: Flying Across Streets Today.

Visual Association

A cheetah running.

Word Web

speed quick rapid velocity

Desafio

Use 'fast' in 3 sentences today.

Origem da palavra

Old English

Original meaning: Firm, fixed, secure

Contexto cultural

None

Used daily in sports, business, and food.

Fast & Furious (movie franchise) Fast Food Nation (book)

Practice in Real Life

Real-World Contexts

travel

  • fast train
  • fast route
  • fast travel

work

  • fast pace
  • fast learner
  • fast track

food

  • fast food
  • fast service
  • fast delivery

sleep

  • fast asleep
  • falling fast asleep

Conversation Starters

"Do you like fast cars?"

"Are you a fast learner?"

"What is your favorite fast food?"

"Do you walk fast?"

"Is your life fast-paced?"

Journal Prompts

Describe a time you had to move fast.

Why do people like fast food?

Is it better to be fast or slow?

What does 'fast asleep' mean to you?

Perguntas frequentes

8 perguntas

No, never use fastly.

Yes, a fast meeting.

Both.

Faster.

Fastest.

Quickly prepared food.

No, it means not eating.

Old English origins.

Teste-se

fill blank A1

The car is ___.

Correto! Quase. Resposta certa: fast

Fast is the correct adjective.

multiple choice A2

Which is an adverb?

Correto! Quase. Resposta certa: fast

Fast is both.

true false B1

Fastly is a correct word.

Correto! Quase. Resposta certa: Falso

It is not a word.

match pairs B1

Word

Significado

All matched!

Collocations match.

sentence order B2

Toque nas palavras abaixo para montar a frase
Correto! Quase. Resposta certa:

Subject-verb-adverb.

Pontuação: /5

Related Content

Mais palavras de Descriptions

short

A1

Describes something that measures a small distance from one end to the other or is not tall in height. It is also used to describe a brief period of time or a limited amount of something.

rapid

A1

Parece haver um erro aqui. 'Rapid' é um adjetivo para rápido. Você quis dizer 'rapid'?

low

A1

Not high or tall in height, often positioned close to the ground or a base level. It can also describe a small amount of something, a quiet sound, or a sad mood.

narrow

A1

Narrow describes something that has a very small distance from one side to the other. It is the opposite of wide and is often used to describe roads, paths, or spaces.

thick

A1

Describes something that has a large distance between its two opposite sides or surfaces. It can also describe liquids that are dense and do not flow easily, or things that grow closely together like hair or forest trees.

full

A1

The complete amount or the state of being total without any parts missing. It is most frequently used in fixed phrases like 'in full' to describe a payment or a name that is complete.

gray

A1

A neutral color that is a mixture of black and white, often seen in clouds, ash, or lead. It is used to describe objects that lack bright color or to represent a sense of seriousness and neutrality.

purple

A1

Purple is a color that is made by mixing red and blue together. It is a common color found in nature, such as in certain flowers and fruits like grapes.

tiny

A1

Describes something that is very small in size, amount, or degree. It is more emphatic than the word 'small' and is often used to highlight how little something is.

perfect

A1

Na gramática, refere-se a tempos verbais de ações concluídas. Também usamos na frase 'a prática leva à perfeição' para descrever um estado sem erros.

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