1. Animals used to be killed by them ( By them có hay không cx đc )
2. The cat wanted to be fed by the children
3. I am made to work hard all day 
4. The meeting have to be cancelled by them ( By them có hay không cx đc )
5. The floor needs cleaning ; the floor needs to be cleaned 
6. The house doesn't need painting
7. I am let to choose my favourite job
8. Their children were made to study all the subjects at school
9. Only vegetables were used to be eaten by me
10. Our house had to be sold because of lacking money
Cấu trúc chung : O + be + P2

1, animals have been killed

2. the cat is wanted to be fed by the children.

3. I was made me work 

4. the meeting have to be canceled.

5. the floor needs to be cleaned

 the floor needs cleaning

6. the house doesnot need to be painted