$\text{1.}$ The shirt was bought by her yesterday.

$\text{→}$ Câu bị động thì QKD: S + was/ were + Ved/ P2 + (by)

$\text{2.}$ The boy's homework has been finished by him.

$\text{→}$ Câu bị động thì HTHT: S + have/ has + been + Ved/ P2 + (by)

$\text{3.}$ The market was rebuilt last year.

$\text{4.}$ The English grammar was explained by our English teachers this morning.

$\text{5.}$ These postcards were sent to us by our friends last Christmas.

$\text{6.}$ The fridge is going to be moved into the living room.

$\text{→}$ Câu bị động thì TLG: S + be + going to be + Ved/ P2 + (by)

$\text{7.}$ Many famous plays were written by Shakespeare.

$\text{8.}$ Some money has been collected for the project by the children.

$\text{9.}$ The meeting will be organized in September.

$\text{→}$ Câu bị động thì TLD: S + will be + Ved/ P2 + (by)

$\text{10.}$ The suspect hasn't been arrested by the police yet.

$\text{11.}$ I will be helped with the project by her.

=>
1. The shirt was bought by her yesterday.
2. The boy's homework has been finished.
3. The market was rebuilt last year.
4. The English grammar was explained by our teachers this morning.
5. These postcards were sent to us by our friends last Christmas.
6. The fridge is going to be moved into the living room.
7. Many famous plays were written by Shakespeare.
8. Some money has been collected for the project by the children.
9. The meeting will be organized in September.
10. The suspect hasn't been arrested by the police yet. 
11. I will be helped with the project by her.

Bị động QKĐ : S was/were V3/ed (by O).

Bị động HTHT : S have/has been V3/ed (by O).

Bị động TLĐ : S will be V3/ed (by O).

is/am/are going to V -> is/am/are going to be V3/ed