1. A song was sung by her
2. bị động r đó bạn
3. I was hit 
4. The bus was stopped by us
5. My car was stolen by a thief
6. He was not let go
7. The prize was not won by her
8. Their beds were not made by them
9. They were not told by me
10. Were they told by you
11. Was the letter sent by him