1 I've been having swimming lessons and now I can / could swim really well.
2 Please could / should I use your mobile phone? Mine doesn't have any power.
3 Sam could / ought to get a job instead of complaining about having no money.
4 Okay, yes - you can / should leave five minutes early today,
5 Do you think I must / should tell Michael the truth about what happened?
6 I can't / couldn't read until I was five years old.
7 I'm sorry, but you can't / couldn't leave your car there.
8 If you want to pass the exam, you can / ought to do some revision.
9 I know John lived in Tokyo, but I don't think he can/ may speak Japanese.
10 Tracy can / could sing really well now that she's had a few lessons.
