Modals and semi modals

People ......... walk on the grass.

......... I ask a question ?

........ you speak slowly?

• Can't

• Could

• Must

Jack has an exam tomorrow, he ...... study.

You ........ do your homework.

• Must

• Mustn't

• Don't have to

We ......... wash our hands before and after eating.

• Don't have to

• Have to

• Couldn't

This sign means that you can use your cellphone

• Yes

• No

This sign means that you can eat in the class.

• Yes

• No

I wil ........ speak to her tomorrow

I wil ........ speak to her tomorrow