Modals
1. - I got D in English literature because I didn`t read “The White Fang”.
- I could have helped/must have helped you if you asked me to.
2. You needn`t have watered/shouldn`t have watered the flowers . I`ve already done it.
3. - I did so badly in my writing test! – Well, you should have studied/might have studied harder then!
4. Linda should be here by now. I don`t understand why she`s not here yet! – She might have missed/must have missed her bus. It`s not like her to be late.
5. Kate, could/may you go out to the blackboard?
6. You may be/maybe right, but let me have a look at your project first.
7. You shouldn`t/mustn`t smoke in the library. It`s prohibited.
8. I didn`t have enough money to pay the bus fee, so I had to/must walk home.
9. If you want to lose some weight, you should/must eat more vegetables.

2. needn`t have watered3. should have studied4. must have missed5. could6. may be7. mustn`t8. had to9. should