30. People say that early Egyptian and Greek sailors used carrier-pigeons.
`=>` It is said that early Egyptian and Greek sailors used carrier-pigeons. ( HTĐ )
31. People saw him steal your suicase.
`=>` He was seen to steal your suicase. ( QKĐ )
32. Mr. Adam used to drink a lot of wine.
`=>` A lot of wine used to be drunk by Mr. Adam. ( QKĐ )
33. She was cooking dinner when we dropped in to see her.
`=>` Dinner was being cooker by her when we dropped in to see her. ( QKTD )
34. He phoned me after he had finished the oral test.
`=>` I was phoned by him after he had finished the oral test. ( QKĐ )
35. They will have used a lot of robots in factories by 2020.
`=>` A lot of robots will have been used in factories by 2020. ( TLHT )
36. Did people make jeans two hundred years ago?
`=>` Were jeans made two hundred years ago? ( QKĐ )
37. I had a boy polish my shoes every Monday.
`=>` My shoes were polished by a boy every Monday.
38. Clear up the house at once.
`=>` Let the house be cleared up at once.
*) Cấu trúc bị động của câu mệnh lệnh: Let + object + be + PII
39. We are going to open the new restaurant tomorrow.
`=>` The new restaurant is going to be opened tomorrow. ( tương lai gần )
40. They are going to have a mechanic repair their car.
`=>` Their car is going to be repaired by a mechanic. ( tương lai gần )
41. When will they pull this old building down?
`=>` When will this old building down be pulled down ? ( TLĐ )
