2. He has to pay a great amount of money for his education.
3. The teacher said they could all go home.
4. We could not do all this work.
6. Now he is to continue his education.
9. Nick might have left his exercise book at home.
12. I may come to him any day I like.
13. You must do something about it.
14. He has to pay a great amount of money for his education.
15. Nick cannot go to school today.