Cấu trúc câu bị động đặc biệt (câu bị động kép):

People/they + think/say/suppose/believe/consider/report…..+ that + clause
⟶ It+ to be + thought/said/ supposed/believed/considered/reported…+ that + clause hoặc
⟶ S + to be + thought/ said/supposed… + to + V-inf (khi 2 vế cùng thì)

⟶ S + to be + thought/ said/supposed… + to + have + v3/ed (khi 2 vế khác thì)

1.people know that cars pollute the evironmet

It is known that cars pollute the environment.

Cars are known to pollute the environment.

2.peole belive that the robber has worked in the bank.

It is believed that the robber has worked in the bank.

The robber is believed to have worked in the bank.

3.many people believe that she is an honest person.

It is believed that she is an honest person.

She is believed to be an honest person.

4.they think that the president will arrive soon.

It is though that the president will arrive soon.

The president is though to arrive soon.

5.they say that he has passed the final exam with the best result.

It is said that he has passed the final exam with the best result.

He is said to have passed the final exam with the best result.