fast
gb/fˈæst/ us/fˈæst/
A1
英语
~ 1800
义项
0 个义项
adjective
A1
property
1
Moving quickly
Moving very quickly.
用法模式：
[something] is fast
常见错误：
Learners sometimes confuse 'fast' and 'quickly'; 'fast' is often used after 'be' verbs, while 'quickly' is an adverb modifying actions.
近义词
quick (Slightly more general; can refer to actions or processes, not just movement speed.)
反义词
slow (Describes low speed or lack of quickness.)
搭配
fast car
|fast train
|fast runner
|fast pace
主题
daily life
|transport
|sports
|core_vocabulary
|travel
|transportation
例句
- The cheetah is the fastest land animal.
- She drives a very fast car.
- This computer is fast compared to my old one.
学习者例句
- The bus is fast.
- He runs fast.
- This phone is fast.
adverb
A1
property
2
At a high speed
Quickly or with high speed.
用法模式：
[someone] runs fast
常见错误：
Learners may incorrectly say 'fastly'; the correct form is 'fast'.
近义词
quickly (More general in use; 'fast' is less formal and often used in speech.)
反义词
slowly (Describes doing something at a low speed.)
搭配
run fast
|drive fast
|move fast
主题
daily life
|sports
|core_vocabulary
例句
- He runs surprisingly fast for his age.
- The train was moving too fast to stop in time.
- She talks fast when she’s nervous.
学习者例句
- He runs fast.
- The car moves fast.
- She speaks fast.
adjective
B1
property
3
Firmly fixed, secure
Held tightly and not able to move.
用法模式：
[something] is fast [somewhere]
近义词
secure (Emphasizes safety or protection rather than immovability.)
反义词
loose (Not firmly fixed or attached.)
搭配
hold fast
|stuck fast
|fast asleep
主题
construction
|daily life
|core_vocabulary
例句
- The boat was held fast by the rope.
- The lid was stuck fast and wouldn’t open.
- He held her arm fast.
学习者例句
- The rope holds the boat fast.
- The lid is stuck fast.
- He holds my hand fast.
动词
B1
action
4
Go without food for a time
To not eat for some time, often for religion or health.
用法模式：
to fast for [time period]
近义词
abstain from eating (More formal and explicit description of the action.)
反义词
feast (To eat a lot, often in celebration.)
搭配
fast during Ramadan
|fast for 24 hours
主题
religion
|health
|food_drink
例句
- Muslims fast from dawn to sunset during Ramadan.
- Some people fast once a week for health benefits.
- He decided to fast for two days before the operation.
学习者例句
- I fast during Ramadan.
- She will fast for one day.
- They fast for health.
名词
B1
event
5
A period of not eating food
A time when you do not eat food for religion or health.
近义词
abstinence from food (Formal phrase, used in medical or religious contexts.)
反义词
feast (An event with abundant eating.)
搭配
religious fast
|go on a fast
主题
religion
|health
|food_drink
例句
- They went on a three-day fast before the ceremony.
- The doctor recommended a short fast before the test.
- Breaking the fast is an important tradition.
学习者例句
- He went on a fast.
- The fast lasts two days.
- We break the fast at night.
语法
词典原形
fast
IPA
GB/fˈæst/
US/fˈæst/
音节与重音
fast （1 个音节）
Stress on 1st syllable (fast)
词形变化
Adjective
- Base: fast
- Comparative: faster
- Superlative: fastest
Noun
- Base: fast
- Plural: fast, fasts
Verb
- Base: fast
- 3rd Person Singular: fasts
- Present Participle: fasting
- Past: fasted
词族
相关表达
hold fast
1/hˈoʊld fˈæst/
fixed phrase
Keep a firm grip on something
To keep holding something tightly and not let go.
例句
- Hold fast to the railing when climbing the stairs.
- He held fast to his beliefs despite criticism.
play fast and loose
1/plˈeɪ fˈæst ˈænd lˈus/
idiom
informal
Act carelessly or dishonestly
To behave without care or honesty, especially with rules or promises.
例句
- The company played fast and loose with safety regulations.
- You can't play fast and loose with people's trust.
fast asleep
1/fˈæst əslˈip/
fixed phrase
sleeping very deeply
Sleeping very deeply and peacefully.
例句
- By 10 p.m., the children were fast asleep.
- She looked so peaceful, fast asleep under the blanket.
fast asleep
2/fˈæst əslˈip/
fixed phrase
In deep sleep
Sleeping very deeply.
例句
- She was already fast asleep when I came home.
- The baby is fast asleep in his crib.