3. don't have to
4. doesn't have to
5. mustn't
6. don't have to
7. mustn't
8. mustn't
9. don't have to
10. doesn't have to
3.don't have to 4.doesn't have to 5.mustn't 6.don't have to 7.mustn't 8.mustn't 9.don't have to 10.doesn't have to
