`1,` This factory wasn't built by the Germans during the Second World War.

`-` Câu bị động qkđ: S `+` was/were `+` V-ed/V3…(by `+` O) 

`2,` This house and these cars are going to be painted by the Greens for Christmas Day.

`-` Câu bị động của tương lai gần: S `+` tobe `+` going to be `+` V3/V-ed …. (by `+` O) 

`3,` The cats had been fed by Ann before she went to the cinema.

`-` Câu bị động qkht: S `+` had `+` been `+` V3/V-ed… (by `+` O) 

`4,` The pollution problems have been discussed by the students since last week.

`-` Câu bị động HTHT: S `+` have/has `+` been `+` V3/V-ed..(by `+` O) 

`5,` Has the most valuable painting in the national museum been stolen by the thieves?

`+` Thể nghi vấn: Have/Has `+` S `+` been `+` V3/V-ed..(by `+` O) ?

`6,` The new president will be interviewed on TV. 

`-` Câu bị động của TLĐ: S `+` will `+` be `+` V3/V-ed..(by `+` O) 

${\text{Lưu ý: }}$

`+` Các đại từ bất định như somebody, nobody, people,..  không dùng by + O. 

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