Ex2: Change the following sentences into passive voice
1 Mr Tuan delivered the speech yesterday.
->the speech was delivered by Mr Tuan yesterday .
2 You should turn off the computer at night.
->the computer should be turned off at night.
3 Someone has stolen my bike.
->my bike has been stolen.
4 She did this exercrise two days ago.
->this exercrise was done two days ago.
5 she will buy this house.
-> this house will be bought (by her).
6 The workers will build my house next week.
->my house will be built by the workers next week.
7 He has looked this door.
->this door has looked by him.
8 last night the visitor ate all the cakes.
-> all the cakes were eaten by the visitor last night.
9 Tom and Bill painted the fence over there.
->the fence over there were painted Tom and Bill.
10 You must finish your homework before 9 o'clock.
-> your homework must be finished before 9 o'clock.
11 No one helped her to solve that problem.
->she wasn't helped to solve that problem.
12 Jane doesn't drink tea very often.
->tea isn't drunk by Jane very often.
13 People speak English all over the world.
->English is spoken all over the world.
14 I haven't seen him for 3 months.
-> He hasn't been seen for 3 months
15 You have to give the book back.
->the book has to be given back.