1. could not, should
2. has to
3. must
4. has to, needn't, may
5. would you like to
6. should, shouldn't, could
7. could
8. would you like to
1. could not, should
2. has to
3. must
4. has to, needn't, may
5. would you like to
6. should, shouldn't, could
7. could
8. would you like to