`11`/ The window should be opened.

`12`/ The little boy has to looked after.

`13`/ The house is cleaned everyday.

`14`/ The shops is opned at 7 a.m .

`15`/ The letter has not been sent yet.

`16`/ Houses was used to built of straw and mud.

`17`/ The room has not been decorated yet.

`18`/ Computers is used in all kinds of works.

`19`/ This kind of car is made a long time a go

Nhắc sơ:

Khi gặp thì passive voice ( thì bị động )

+ )S + to be + v / 3 + O.

-  ) S + to be + not + v/ 3 + O.

?  ) To be + S + v / 3 + O?

11)The window should be opened.

12)The little boy has to be looked after.

13)The house is cleaned every day.

14)The shops are opened at 7a.m

15)The letter hasn't been sent yet.

16)Houses used to be built of straw and mud

17)The room hasn't been decorated yet.

18)Computers are used in all kinds of work.

19)This kind of car was made a long time ago.

Câu bị động thì hiện tại hoàn thành: S1+have/has(not)been+Vpii+by+S2.

Câu bị động với thì used to:S1+used to/ wasn't/weren't used to+Vpii+by+S2