2) he ought to be more careful

3) this must John's car

4) he can't be her brother

5) he wasn't able to swim when he was five

6) he might win the race

7) you mustn't play in the garden

8) they needn't to repair the car

9) would you want another drink

10) they can't eat so much

11) shall i open the window?

12) She could still be at work

13) would you want my help with that

14) She can't be the woman Who spoke to me