Must – mustn’t – can – can't – could – needn’t – will – won’t
1. Dogs ………………… fly.
2. You ………………… wear a coat, it's quite warm.
3. Students ………………… be quiet when they write the test!
4. I ………………… go to school tomorrow because I am ill.
5. ………………… you open the window, please?
6. You ………………… drive fast. It's dangerous!
7. When he was fifteen he ………………… run fast but he can't now.
8. She's a famous ballerina. She ………………… dance very well.
9. She ………………… dance at the party because her leg was broken.
10. If you go to bed so late every day, of course you ………………… feel tired.
11. Your father is sleeping. You ………………… be noisy.
12. Birds ………………… fly.
13. If you don't study, you ………………… do very well in the test.
14. He is late; he ………………… run to school.
15. We ………………… book a table in the restaurant. John has already booked one for us.
16. Lions ………………… sing.