Odpowiedź:
4.1 They should have finished the project last week, but they didn't.
4.2. You didn't have to buy bread. Mum has already bought one.
4.3. I had to sign the contract last Friday.
4.4. We were not allowed to cross the border as we didn't have valid passports.
4.5. Shall I carry this suitcase for you?
5.1. You should have not leave your bike outside the shop. That's why it got stolen.
5.2. When I was at ballet school, I was supposed to practise for a few hours a day.
5.3. Phew! We made it on time so we don't need to worry.
5.4. Fortunately it was Sunday, so Claire didn't need to go to work.
5.5. I ought have taken a taxi yesterday.
