1. Was the book found by your brother, wasn't it ?

-> bị động ở quá khứ, dạng tag question

2. I would like Lan to be given a nice present. 

-> active voice: would like so to do sth

-> passive voice: would like so to be done (by so)

3. He doesn't like to be asked stupid questions

->active voice: like so to do sth

->passive voice: like to be done (by so)

4. Have your name written on this piece of paper

->act. v. : Do sth-> write sth

->pass. v. :Have sth done->Have sth written

5. She hates being stared at

->hate so doing sth

->hate being done

6. Will she be invited to your wedding party?

->invite sb to sth

->sb be invited to sth

7. Has the window of the laboratory been mended ?

->sb mend sth

->sth be mended (by sb)

8. How many games have been played by the team?

->Sb do sth

->sth be done (by sb)

9. Who is being kept in the room?

-> bị động hiện tại tiếp diễn

->sb be keeping sb else

-> sb else being kept by (sb)

10. By whom were the children looked after for you?

->sb look after sb else

-> sb else be looked after (by sb)

11. She has been heard  to sing this song many times

->Sb hear sb else do sth

->sb else be heard to do sth (by sb)

12. Let them be told about it

->let so tell so else

->let so else be told