Could vs It might

When to use each in English, with meaning, register, and examples.

Could

Top 1,000 (very common)A1

It might

Top 1,000 (very common)
 CouldIt might
Pronunciation🇬🇧 /["/kəd//kʊd/","/ˈkʊdnt/"]/🇺🇸 /["/kəd//kʊd/","/ˈkʊdnt/"]/🇬🇧 //ɪt maɪt//🇺🇸 //ɪt maɪt//
Meaningused to express possibility or ability in the pastIt could possibly be true or happen.
ExampleI could help you with your homework if you want.It might rain later, so take an umbrella.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelA1-
Collocationscould have, could you, could not, could beIt might rain, It might happen, It might be true, It might work, It might be better
Antonymscouldn't, can't-
Common mistakesConfused with 'can' for present ability instead of past., Omitting the base verb after 'could'., Using 'could' for future intentions instead of 'would' or 'will'.Confusing with 'it may' which is more formal, Using 'might' in certain future contexts instead of 'may', Not using 'it might' with a verb, e.g. 'It might a storm' instead of 'It might rain'.
Usage notesUsed to talk about ability, requests, and possibilities. Considered neutral; avoid in very formal writing.Used to express possibility. Common in spoken and written contexts but less formal than alternatives like 'it may'.

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Could
It might

Frequently asked questions: Could vs It might

What's the difference between Could and It might?

Could: used to express possibility or ability in the past It might: It could possibly be true or happen.

Can you show an example of each?

Could: I could help you with your homework if you want. It might: It might rain later, so take an umbrella.

Can I use Could and It might interchangeably?

Not always. Could and It might 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.

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