Have to / don't have to & Must / mustn't

Used when something is necessary or is an obligation.

• have to

• base form of verb

• don't have

Used when something isn’t necessary to do it.

• Have to

• Must

• Don’t have to

True or false: "Must" refers to personal obligations (opinions or rules made by yourself).

• True

• Maybe

• False

"He don’t has to vacuum the floor." Is this sentence correct?

• Yes

• No

• I don't know

"Do they have to do any homework tonight ?" Is this sentence correct?

• Yes

• No

• Maybe