Cool MateAct vs Behave vs Conduct vs React
When to use each in English, with meaning, register, and examples.
Act
Top 1,000 (very common)A2verb
Behave
Top 1,000 (very common)A2verb
Conduct
Top 2,000 (common)B2verb
React
Top 1,000 (very common)A2verb
| Act | Behave | Conduct | React | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/ækt/","/ækts/","/ˈæktɪd/","/ˈæktɪŋ/"]/🇺🇸 /["/ækt/","/ækts/","/ˈæktɪd/","/ˈæktɪŋ/"]/ | 🇬🇧 /["/bɪˈheɪv/","/bɪˈheɪvz/","/bɪˈheɪvd/","/bɪˈheɪvɪŋ/"]/🇺🇸 /["/bɪˈheɪv/","/bɪˈheɪvz/","/bɪˈheɪvd/","/bɪˈheɪvɪŋ/"]/ | 🇬🇧 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/🇺🇸 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/ | 🇬🇧 /["/riˈækt/","/riˈækts/","/riˈæktɪd/","/riˈæktɪŋ/"]/🇺🇸 /["/riˈækt/","/riˈækts/","/riˈæktɪd/","/riˈæktɪŋ/"]/ |
| Meaning | To do something or take action. | to act in a certain way, usually in a good way | To lead or manage something, like a project or an activity. | To respond to something. |
| Example | She decided to act in the school play this year. | You need to behave properly during the meeting. | The scientist will conduct an experiment to test the hypothesis. | She always knows how to react to unexpected situations. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 1,000 (very common) | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | A2 | A2 | B2 | A2 |
| Part of speech | verb | verb | verb | verb |
| Collocations | at once, immediately, promptly, against, for somebody, on behalf of somebody, act as if, act in somebody’s best interests, act in good faith, at once, immediately, promptly, against, for somebody, on behalf of somebody, act as if, act in somebody’s best interests, act in good faith, brilliantly, well, badly, brilliantly, well, badly | impeccably, perfectly, well, according to, as if, as though, impeccably, perfectly, well, according to, as if, as though | independently, separately, jointly, honourably/honorably, well, with dignity, as, in, well | strongly, favourably/favorably, positively, tend to, be slow to, not know how to, against, by, to, strongly, favourably/favorably, positively, tend to, be slow to, not know how to, against, by, to, strongly, favourably/favorably, positively, tend to, be slow to, not know how to, against, by, to |
| Antonyms | ignore, neglect, refrain | misbehave, disobey, rebel | neglect, abandon | ignore, overlook, neglect |
| Common mistakes | 'Act' is sometimes confused with 'take action', which has a slightly different connotation., Learners often omit the preposition when using 'act on' phrases., 'Act' may be incorrectly used as a noun instead of a verb. | Incorrectly using 'behave' as a noun., Using 'behave' without indicating how (e.g., 'behave well')., Confusing with 'misbehave' without context. | Confused with 'conduct' as a noun vs. verb., Incorrectly using it without an object, e.g., 'conduct a meeting' instead of just 'conduct'., Mixing up 'conduct' with similar verbs like 'perform' or 'carry out'. | Confused with 'act' instead of 'react'., Using the incorrect preposition (should be 'react to', not 'react with')., Forget to specify what is being reacted to. |
| Usage notes | Use 'act' in both formal and informal contexts when referring to behavior. Avoid using it in overly casual settings when describing serious actions. | Use 'behave' in contexts where actions are guided by rules or expectations, especially with children. It's neutral and appropriate in both casual and formal settings. Avoid using it in extremely informal or slang contexts. | Use ‘conduct’ in formal contexts, such as business or research. It is not suitable for casual conversations or informal writing. | Commonly used in both spoken and written English. Suitable in formal and informal contexts. Avoid using it in overly casual settings where simpler words like 'say' might be more appropriate. |
See it in real clips
Frequently asked questions: Act vs Behave vs Conduct vs React
What's the difference between Act, Behave, Conduct, and React?
Act: To do something or take action. Behave: to act in a certain way, usually in a good way Conduct: To lead or manage something, like a project or an activity. React: To respond to something.
Which is more advanced: Act, Behave, Conduct, and React?
Conduct is the highest level, at B2, on the CEFR scale.
Are Act, Behave, Conduct, and React the same CEFR level?
Act: A2, Behave: A2, Conduct: B2, React: A2 on the CEFR scale.
What part of speech are Act, Behave, Conduct, and React?
Act: verb, Behave: verb, Conduct: verb, React: verb.
Can you show an example of each?
Act: She decided to act in the school play this year. Behave: You need to behave properly during the meeting. Conduct: The scientist will conduct an experiment to test the hypothesis. React: She always knows how to react to unexpected situations.
Can I use Act, Behave, Conduct, and React interchangeably?
Not always. Act, Behave, Conduct, and React are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.