Choose the most suitable form.

1. He asked us if he may/is able to make a suggestion.

2. You can/must read this book, it’s really excellent.

3. She mustn't/couldn't have overslept. Three alarm clocks had been set the night

before to wake her up.

4. The fireman was able to/could introduce his hand through the narrow opening

and open the door; otherwise the child couldn't have been/weren't able to come

out.
5. In this season you mustn't/don't need to water the flowers every day; it's raining

quite often.

6. She was very obstinate. She would/should never do what her parents told her.

7. I must/dare not ask her to wait anymore. She's been here for two hours.

8. You wouldn't/shouldn't open that letter. It's for father.

9. You may/can be older than her but you look twice as good.

10. This needn't/can't be the building grandpa described; he said it was big, this one

is hardly bigger than a house.

11. I did my best but the car can't/won't start.

12. I could help/could have helped you if only you had asked me to.

13. There used to/would be a supermarket at this corner.

14. I might/should go now; it's getting late​