Lesson 10

I must
We must
You must
You must
He/she/it must
They must


I have to
We have to
You have to
You have to
He/she/it has to
They have to


I don’t have to
We don’t have to
You don’t have to
You don’t have to
He doesn’t have to
They don’t have to


Do I have to?
Do we have to?
Do you have to?
Do you have to?
Does he have to?
Do they have to?


The verb must is a modal verb. We use must with other verbs. For example, I must go. You must go. He must play.

We don’t use to after must. We use must in positive sentences. We don’t use must in negative sentences and questions.

Must is not used very often in today’s English. It is better to use have to.


I must work very hard. I must work for the captain. I have to run away. I have to make a plan.

You can see more examples in the book Robinson Crusoe.