1. This car has been bought by Nina

2. The thief has been found by the police

3. Her pen has been found

4. The reports have been finished by me

5. These pencil cases have been bought by Nina

6. These newspapers haven't been bought by Nina

7. These reports have been typed for 2 hours

8. My dogs have been taken care of by my father

9. Has computer science been studied by your brother since June?

10. This movie hasn't been seen by my mother

QKĐ: S + was/ were + PP + (by O)

QKTD: S + was/ were + being + PP + (by O)

QKHT: S + had + been + PP + (by O)

HTĐ: S + am/ is/ are + PP + (by O)

HTTD: S + am/ is/ are + being + PP + (by O)

HTHT: S + have/ has + been + PP+ (by O)

TLĐ: S + will be + PP + (by O)

TLG: S + is/ am/ are + going to + be + PP + (by O)

S + modal verb (should, must, have to, can,...) + be + PP + (by O)