1. The streets haven't been cleaned this week.
2. He has his car serviced last week.
3. The time machine will be shown to the public when it's finished
4. Our dog bit the postman
5. Susan may know the address
6. Joanna might not have received my message.
7. She can't have done it on purpose
8. He needn't have brought the umbrella along
9. You should come to the party because it was the most interesting.
10. You must have had a good time at the party
11. You shouldn't leave the window open last night
12. You needn't go to so much trouble