American English
/məst̚/
One syllable.
Used to say that someone is required to do something, or that something is very necessary.
Practice out loudUsed to say that someone is required to do something, or that something is very necessary.
You must show your ID at the door.
We must leave by six.
must follow the rules · must be on time · must wear a seat belt
subject + must + base verb
Used to say that someone is not allowed to do something.
Visitors must not touch the artwork.
You must not share this password.
Must not means “not allowed to,” not simply “not have to.”
must not enter · must not touch
subject + must not + base verb
Used to say that you strongly believe something is true because of the evidence.
She must be at work; her car is gone.
They must have missed the train.
must be true · must be tired · must have forgotten
subject + must be + adjective or noun
subject + must have + past participle
something that is essential or very desirable
A good camera is a must-have for her.
something that is very worth seeing
The museum is a must-see.