1. Fill in must or mustn't.
1. You look pale. I think you ... see the doctor.
2. It's very slippery outside. You ... run there.
3. You ... throw litter on the pavement.
4. Children ... look neat and clean at school.
5. You ... make noise in the library.
6. You ... brush your teeth before going to be
7. You ... fasten your seatbelt in a car.
8. Children ... watch TV a lot.
9. You ... light a fire in the forest.
10. You ... be friendly to other people.
Make questions!
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1. You look pale. I think you must see the doctor.

2. It's very slippery outside. You mustn’t run there.

3. You mustn’t throw litter on the pavement.

4. Children must look neat and clean at school.

5. You mustn’t make noise in the library.

6. You must brush your teeth before going to be

7. You must fasten your seatbelt in a car.

8. Children mustn’t watch TV a lot.

9. You mustn’t light a fire in the forest.

10. You must be friendly to other people.

1. You look pale. Must you see the doctor?

2. It's very slippery outside. Must you run there?

3. Must you throw litter on the pavement?

4. Must children look neat and clean at school?

5. Must you make noise in the library?

6. Must you brush your teeth before going to bed?

7. Must you fasten your seatbelt in a car?

8. Must children watch TV a lot?

9. Must you light a fire in the forest?

10. Must you be friendly to other people?