noun
definition
Something that is mandatory or required.
example
If you'll be out all day, a map is a must.
synonyms
verb
definition
(modal auxiliary, defective) To do with certainty; indicates that the speaker is certain that the subject will have executed the predicate.
example
If it has rained all day, it must be very wet outside.
definition
(modal auxiliary, defective) To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a negative consequence.
example
This door handle must be rotated fully.
definition
(modal auxiliary, defective) said about something that is very likely, probable, or certain to be true
example
The children must be asleep by now.
Examples of must in a Sentence
We must not be late.
She must be very uneasy about you.
You must be mistaken.
That must make you about five years old.
He must have changed clothes during the night.
But you must help me.
You must be starving.
That must have been really difficult for you.
He must be devastated.
You must tell me!
But first I must thank these poor people.
We must have breakfast first.
Someone must have been killed.
He must not be left like this.
I know how you must have been overwearied with long hours of watching.
You must know that by now.
But I must do as father says.
His mother must have been secretive as well.
Alex must have listened to her message.
It must have worked, because his trainees were some of the best officers.
I tell her she must go.
Now I must close.
If the people of Boston must fight for their liberty, we will help them.
Must tell Nicholas this.
I must apologize for Dulce.
We must have another entree.
It must be written down so that people in other places and in other times may hear it read and sung.
You must have a rest.
We are drowsing, but we must act.
Confucius says truly, "Virtue does not remain as an abandoned orphan; it must of necessity have neighbors."
The next one that whispers must come out and stand in the middle of the floor.
You must believe that.
You know some decision must be come to.
But I must not forget that I was going to write about last summer in particular.
You must please excuse me, he went on apologetically.
People play chess, so that object playing the Grand Master must be a person.
So the problem must be that we have stretched the planet past its ability to feed its inhabitants, right?
Marya Dmitrievna went on admonishing her for some time, enjoining on her that it must all be kept from her father and assuring her that nobody would know anything about it if only Natasha herself would undertake to forget it all and not let anyone see that something had happened.
Alex must be proud.
He must have been overwhelmed with the responsibility - and guilt.
It must have been quite an exciting time to be alive.
I must go now to see my garden.
He must be exhausted.
I absolutely must see him, however painful it may be for me.
Well, she must have thought it was something.
You must be exhausted.
Now I must say, good-bye.
Boy must be very careful.
Everything must have a name now.
But you must not think I blame any one.