Must vs We have to

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

Must

High-frequency chunkA1

We have to

Top 1,000 (very common)
 MustWe have to
Pronunciation🇬🇧 /["/məst//mʌst/","/ˈmʌsnt/"]/🇺🇸 /["/məst//mʌst/","/ˈmʌsnt/"]/🇬🇧 //wiː hæv tə//🇺🇸 //wi hæv tə//
MeaningSomething that is necessary or very important.We must do something.
ExampleYou must finish your homework before playing outside.We have to finish this project by Friday.
RegisterNeutralNeutral
How commonHigh-frequency chunkTop 1,000 (very common)
CEFR levelA1-
Collocationsmust see, must do, must have, must rememberhave to go, have to do, have to say, have to make, have to see
Antonymscan, may, might-
Common mistakesUsing 'must' in situations where 'have to' is more suitable., Confusing 'must' with 'might' or 'may', which imply possibility instead of necessity., Using 'must' with the gerund form instead of the base form of the verb.Using 'have' without 'to' (e.g., saying 'we have go' instead of 'we have to go'), Confusing 'have to' with 'must' in terms of formality, Incorrectly conjugating 'have' (e.g., saying 'I has to go')
Usage notesUse 'must' when giving strong advice or making strong recommendations. Avoid using it in casual conversations where 'should' might be more appropriate.Used to express necessity or obligation. Commonly used in both spoken and written English. Can be informal in casual conversations but is appropriate in most contexts.

See it in real clips

Must
We have to

Frequently asked questions: Must vs We have to

What's the difference between Must and We have to?

Must: Something that is necessary or very important. We have to: We must do something.

Can you show an example of each?

Must: You must finish your homework before playing outside. We have to: We have to finish this project by Friday.

Can I use Must and We have to interchangeably?

Not always. Must and We have to 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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