33: Columbus discovered America in 1492.

--> America  was discovered by Columbus in 1942

Đây là câu bị động của thì Qúa Khứ Đơn

Cấu trúc:   S(vật) + was/were + Vp2 +(byO)

34:Could I have a look at your homework?

--> Would you mind if i had a lot of home work?

Would you mind if i + V past

35: A bridge has been declared unsafe. It was built only 2 years ago.

--> A bridge which was built 2 years ago is has been declared unsafe

A bridge→chỉ vật→dùng which

36: It is his bad habit to leave the door open after coming in.

--> He is always leaving the door open after coming in.

Dùng be always V-ing để phàn nàn về 1 thói quen, hành động xấu 

33. Columbus discovered America in 1492. --> America……………………………………………………………………………

→ America was discovered by Columbus in 1492.

Câu bị động thì QKĐ, dấu hiệu: in 1492

Cấu trúc: S + was/were + V_ed/3 + (by O)

34.34. Could I have a look at your homework? if……………………………………………………………?

→ Would you mind if I had a look at your homework?

Cấu trúc: would you mind + S + V_ed/2 + .......

35. A bridge has been declared unsafe. It was built only 2 years ago.

→ A bridge has been declared unsafe. It was built only 2 years ago. 

A bridge which was built 2 years ago is has been declared unsafe A bridge→chỉ vật→dùng which

36:It is his bad habit to leave the door open after coming in.

It is his bad habit to leave the door open after coming in.
→  He is always leaving the door open after coming in.
Dùng be always V-ing để phàn nàn về 1 thói quen, hành động xấu