fast
gb/fˈæst/ us/fˈæst/
A1
英語
~ 1800
語義
0件の語義
adjective
A1
property
1
Moving quickly
Moving very quickly.
用法パターン：
[something] is fast
よくある間違い：
Learners sometimes confuse 'fast' and 'quickly'; 'fast' is often used after 'be' verbs, while 'quickly' is an adverb modifying actions.
類義語
quick (Slightly more general; can refer to actions or processes, not just movement speed.)
対義語
slow (Describes low speed or lack of quickness.)
コロケーション
fast car
|fast train
|fast runner
|fast pace
テーマ
daily life
|transport
|sports
|core_vocabulary
|travel
|transportation
例文
- The cheetah is the fastest land animal.
- She drives a very fast car.
- This computer is fast compared to my old one.
学習者向け例文
- The bus is fast.
- He runs fast.
- This phone is fast.
adverb
A1
property
2
At a high speed
Quickly or with high speed.
用法パターン：
[someone] runs fast
よくある間違い：
Learners may incorrectly say 'fastly'; the correct form is 'fast'.
類義語
quickly (More general in use; 'fast' is less formal and often used in speech.)
対義語
slowly (Describes doing something at a low speed.)
コロケーション
run fast
|drive fast
|move fast
テーマ
daily life
|sports
|core_vocabulary
例文
- He runs surprisingly fast for his age.
- The train was moving too fast to stop in time.
- She talks fast when she’s nervous.
学習者向け例文
- He runs fast.
- The car moves fast.
- She speaks fast.
adjective
B1
property
3
Firmly fixed, secure
Held tightly and not able to move.
用法パターン：
[something] is fast [somewhere]
類義語
secure (Emphasizes safety or protection rather than immovability.)
対義語
loose (Not firmly fixed or attached.)
コロケーション
hold fast
|stuck fast
|fast asleep
テーマ
construction
|daily life
|core_vocabulary
例文
- The boat was held fast by the rope.
- The lid was stuck fast and wouldn’t open.
- He held her arm fast.
学習者向け例文
- The rope holds the boat fast.
- The lid is stuck fast.
- He holds my hand fast.
動詞
B1
action
4
Go without food for a time
To not eat for some time, often for religion or health.
用法パターン：
to fast for [time period]
類義語
abstain from eating (More formal and explicit description of the action.)
対義語
feast (To eat a lot, often in celebration.)
コロケーション
fast during Ramadan
|fast for 24 hours
テーマ
religion
|health
|food_drink
例文
- 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.
学習者向け例文
- I fast during Ramadan.
- She will fast for one day.
- They fast for health.
名詞
B1
event
5
A period of not eating food
A time when you do not eat food for religion or health.
類義語
abstinence from food (Formal phrase, used in medical or religious contexts.)
対義語
feast (An event with abundant eating.)
コロケーション
religious fast
|go on a fast
テーマ
religion
|health
|food_drink
例文
- 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.
学習者向け例文
- He went on a fast.
- The fast lasts two days.
- We break the fast at night.
文法
辞書形
fast
IPA
GB/fˈæst/
US/fˈæst/
音節・強勢
fast （1音節）
Stress on 1st syllable (fast)
活用形
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
関連語
表現
hold fast
1/hˈoʊld fˈæst/
fixed phrase
Keep a firm grip on something
To keep holding something tightly and not let go.
例文
- 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.
例文
- 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.
例文
- 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.
例文
- She was already fast asleep when I came home.
- The baby is fast asleep in his crib.