$\text{1.}$ Some of my books have been taken away . 

→ Bị động thì HTHT : S + has/have + been + Vpp  + ( by O ) 

$\text{2.}$ The engine of the car has to be repaired . 

→ Bị động của ĐT khuyết thiếu : S + modal verb + be + Vpp + ( by O ) 

$\text{3.}$ The window was broken and some pictures were taken away by the boys.

→ Bị động thì Quá Khứ Đơn : S + was/were + Vpp + ( by O ) 

$\text{4.}$A lot of money is spent on advertising everyday.

→ Bị động thì Hiện Tại Đơn : S + is/am/are + Vpp + ( by O ) 

$\text{5.}$ This room may be used for the classroom.

→ Bị động của ĐT khuyết thiếu : S + modal verb + be + Vpp + ( by O ) 

$\text{6.}$ A story is going to be told by the teacher.

→ Bị động thì TLG : S + is/am/are + going to be + Vpp + ( by O ) 

$#Keisha$

1.Somebody has taken some of my books a way

=> Some of my books have been taken away by somebody

2.They have to repair the engine of the car.

=> The engine off the car have to be repaired

3.The boys broke the window and took away the pictures

=> The window was broken and some money was taken away by the boys.

4.People spend a lot of money on advertising everyday

=> People spend a lot of money on advertising everyday

5.They may use this room for the classroom

=> This room may be used for the classroom

6.The teacher is going to tell the story

=> A story is going to be told by the teacher.