1. May
2. don't have to
3. can't have
4. has to
5. may
6. need
7. should
8. need to
9. must have
10. mustn't
1. May
2. don't have to
3. can't have
4. has to
5. may
6. need
7. should
8. need to
9. must have
10. mustn't