1. I have to study this weekend.

2. You mustn't feed the animals in the zoo.

3. I must make my bed every morning. I must help my parents at home.

4. You should do exercise every day.

5. You shouldn't listen to loud music.

6. You don't have to help me now.

7. They have to study hard if they want to pass their exams.

8. You mustn't use your mobile phone in class.

9. She doesn't have to wear a uniform at school.

10. You shouldn't eat fast food.