6. It is known that cars pollute the environment

Cách đổi sang passive voice:

Ex:

People know that cars pollute the environment

-> ta thay thế people/they + V bằng it is+V3/-ed nếu động sau people/they ở thì hiện tại

People know -> It is known 

-> sau đó viết lại mệnh đề that + S+V-> that cars pollute the environment

-> It is known that cars pollute the environment

Chú ý:

People knew , nghĩa là ở thì quá khứ

-> People knew -> It was known 

do đó:po

People knew that cars polluted the environment

-> It was known that cars polluted the environment

7. It is believed that the robber has worked im the bank

8. It is believed that she is an honest person

9. It is thought that the president will arrive soon

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