react
gb/ɹiˈækt/ us/ɹiˈækt/
A2
英語
~ 3000
語義
0件の語義
動詞
A2
action
1
Respond to an action or event
To do or say something because of what just happened or was said.
用法パターン：
to react to [something]
よくある間違い：
Learners sometimes confuse 'react' with 'respond', but 'react' often suggests a more immediate, emotional, or physical action.
類義語
respond (More general and neutral; can be used for both verbal and non-verbal replies.)
対義語
ignore (Means to deliberately not respond to something.)
コロケーション
react quickly
|react angrily
|react positively
|react to criticism
|react under pressure
テーマ
communication
|daily life
|emotions
|core_vocabulary
例文
- She reacted angrily to the unfair comment.
- The company reacted quickly to the sudden drop in sales.
- He didn't know how to react when he heard the news.
- The audience reacted with laughter.
- They reacted positively to the new proposal.
学習者向け例文
- I reacted to the loud noise.
- She reacted with a smile.
- They reacted when they saw the dog.
- He reacted to my question.
- We reacted fast when the phone rang.
動詞
technical
B1
action
2
Undergo chemical change
When a substance changes because it touches another substance.
用法パターン：
to react with [substance]
よくある間違い：
Learners may use 'react' in chemistry without specifying 'with', which is needed to clarify the other substance involved.
類義語
combine (In chemistry, 'combine' can mean join together, but it does not always imply a chemical change.)
対義語
remain inert (Means not undergoing any chemical reaction.)
コロケーション
react chemically
|react violently
|react with oxygen
|react with acid
テーマ
science
|chemistry
例文
- Sodium reacts violently with water.
- The metal will react with oxygen over time.
- This compound reacts with acids to form salts.
- Hydrogen reacts with oxygen to produce water.
学習者向け例文
- Water reacts with hot metal.
- This powder reacts with water.
- The gas reacts with air.
- Iron reacts with oxygen.
- Salt reacts with some chemicals.
動詞
B1
action
3
Show emotional response to event
To show feelings because of what happens.
用法パターン：
to react [adverb] to [something]
よくある間違い：
Learners may confuse this meaning with general 'respond', but here the focus is specifically on emotions shown outwardly.
類義語
overreact (Means to respond too strongly or emotionally compared to what is reasonable.)
対義語
stay calm (Means not showing strong emotion in response to something.)
コロケーション
react emotionally
|react calmly
|react badly
|react strongly
テーマ
emotions
|daily life
|core_vocabulary
例文
- She reacted calmly to the bad news.
- He reacted strongly when accused of lying.
- They reacted emotionally to the movie's ending.
学習者向け例文
- I reacted happily to the gift.
- She reacted sadly to the news.
- He reacted angrily to my words.
文法
辞書形
react
IPA
GB/ɹiˈækt/
US/ɹiˈækt/
音節・強勢
re - act （2音節）
Stress on 2nd syllable (act)
活用形
Verb
- Base: react
- 3rd Person Singular: reacts
- Present Participle: reacting
- Past: reacted
関連語
表現
overreact to
1/ˈoʊvɚɹiˈækt tə/
fixed phrase
Respond too strongly
To act too strongly because of something small or unimportant.
例文
- He overreacted to the small mistake.
- Don't overreact to what she said.
react against
1/ɹiˈækt əɡˈɛnst/
phrasal verb
Oppose in response
To act in a way that shows you are against something because of what happened before.
例文
- Many young people reacted against the strict rules of their parents.
- The voters reacted against the government's policies.
react with shock
1/ɹiˈækt wˈɪθ ʃˈɑk/
fixed phrase
Show surprise and disbelief
To show surprise and that you cannot believe something happened.
例文
- The crowd reacted with shock when they heard the verdict.
- She reacted with shock at the sudden announcement.