`16`. If his bike hadn't broken, he wouldn't have come to school late.

`->` Câu điều kiện loại 3: If + S + had + PII, S + would + have PII.

`17`. If my mom didn't help me, I couldn't finish the work on time.

`->` Câu điều kiện loại 2: If + S + Ved/V2, S +would + V.

`18`. If she didn't overeat, she could sleep easily.

`->` Giải thích giống câu 17.

`19`. Would you mind if I used your bike for a while ?

`->` Would you mind if + S + Ved/V2 ?

`20`. Do you like the flowers which stand in the vase near the window ?

`->` Đại từ quan hệ "which" chỉ vật

`21`. How many times have you been made to iron his clothes ?

`->` Câu bị động thì hiện tại hoàn thành: S + have/has been PII + (by + O).

`->` Câu bị động với "make sb do sth": S + be + made to do sth.

`22`. Did the fence need cutting by you ?

`->` Need + Ving = Need to be PII: cần bị làm gì

Viết lại câu điều kiện lùi thì

ĐK loại I -> lùi thành Đk loại II

ĐK loại II -> lùi thành Đk loại III

Cấu trúc:

đk loại II: S + V2/ed ..., S would V (bare) ...

đk loại III: S + had V3/ed ..., S would have V3/ed...

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đại từ quan hệ, who, whom dùng cho con ng ; which dùng cho vật

16. If his bike had not broken, he would not have come yo school late.

17. If it had not been for my mom's help, I can't fonish the work on time.

18. If there weren't overeating , she would sleep easily.

19. Would you mind if I use your bike for a while?

20. Do you like the flowers which stand in the vase near the window?

21. How many you were made (to) iron his clothes?

make sb do sth = sb be made (to) do sth

22. Did the fence need to be cut (by you)?

need to be V3/ed = need V_ing : cần đc làm gì