....................

37. It is 20 years since he last was back to his hometown.
S + HTHT + for + khoảng thời gian
= It is + khoảng thời gian + since + QKĐ
38. My homework needs finishing/needs to be finished before going out with my friends.
   Bị động với động từ khuyết thiếu need: S (vật) + need V-ing/need to be + V3/ed + O
39. She asked me if my father worked there.
   Câu gián tiếp:
- Không có từ để hỏi `->` if
- Lùi thì: HTĐ `->` QKĐ
- Đổi ngôi: your `->` my 
- here `->` there
40. I wish I were able to go with you.
   Ước điều không có thật ở hiện tại: S + wish + S + V2/ed (QKĐ)
   be chia là were với tất cả các ngôi

37. It is over 20 years since he last was back to his hometown.

S + has/have + not + V3/ed + for/since + time 

--> S + last + V2/ed 

--> The last time + S+ V2/ed + was + time 

--> It is / has been + time + since + S+ (last) + V2/ed 

38. My homework needs finishing before going out with my friends.

need + Ving 

need + to be + V3/ed 

--> bị động

39. She asked me if my father worked there.

S + asked / wanted to know / wondered + (O) + if/whether + S +V (lùi thì)

HTĐ --> QKĐ

here --> there 

40. I wish I were able to go with you.

S + wish(es) + S + were ... : ước ở hiện tại

`color{orange}{~LeAiFuRuiHuiBao~}`