1. I need to get up at 7 o'clock tomorrow.

2. I could speak foreign languages.

3. I can't play musical instruments.

4. I may speak when you were two years old.

5. I shouldn't return home late at night

6. I have to help parents.

7. I need to study hard.

8. I must take exams two times a year.

9. I have to go to the university every day.

10. I mustn't smoke.