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Have to / Must

Subject + have / has to + present tense verb phrase

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Subject + must + present tense verb phrase

have to verb

You have to wear a uniform.

must be

I must be at work by 9am.

Have to / must - explain

General rule

Have to = very important, something bad will happen if you do not do it, you have no choice.

 

Must = something that would be very good if you did it. You have a choice, but you should do it. 

have to
have to