1. It is ten years since I last went to Ho Ch Minh city.

2. Despite being tired, he tried to help me with my homework.

3. It was an expensive car that I can't afford it.

4. I haven't been to New York before.

5. Hung accused her sister of damaging his camera.

6. It wasn't until this summer that we had holidays.

7. Had you not studied hard, you would have failed the exam.

8. Mai is the pretier of the two girls.

9. I've never seen such a good film before.

10. There are over 800 students in my school.

11. That plan is said that to have crashed into the mountains.

12. She tries to learn English well with a view to communicating with foreigners. 

13. I have taught English for 3 years.

14. Lan is the most intelligent in my class.

15. This exercise was so difficult that we couldn't do it.

16. Had you not helped me, I couldn't have passed the exam.

17. I asked Nga when she would come back.

18. This house hasn't been bought.

19. She wouldn't have gotten wet if she had taken an umbrella.

20. He shouldn't buy that house.

1. I haven't gone to Ho Chi Minh city for ten years.

Cấu trúc :

S + last + Ved + time+ ago : Lần cuối cùng làm gì

=> S + have/ has +not+ for + time

=> It’s + time+ since + S + last + Ved.

=> The last time + S + V ed+ was + time + ago.

2. Tired as he was, he tried to help me with my homework.

Cấu trúc :

Although/Though S + V + O, S + V + O = Despite/In spite of N/V-ing, S  + V + O.
=Adj + as/though + S tobe, S + V + O ( Mặc dù…nhưng…).

3. It was such an expensive car that I couldn't afford it.

Cấu trúc: 

It + is/ was + such + (a/an) + adj + N + that + mệnh đề (quá ... đến nỗi mà...)

Dịch nghĩa: Chiếc ô tô quá đắt đến nỗi mà tôi không thể có đủ tiền để mua nó.

4. I haven't been to New York before.

Cấu trúc : 

This is the first time + S + have/has + Vp2: Lần đầu làm gì

=> S +have/has + never + Vp2 + before

=> S+ have/has not + Vp2 + before

5. Hung accused her sister of damaging his camera.

Cấu trúc :

accuse sb of sth: buộc tội ai về việc gì

6. It was not until this summer that we had some holidays.

Cấu trúc :

It was not until...that + mệnh đề (mãi cho đến khi... thì)

7. Had you not studied hard, you would have failed the exam.

Cấu trúc đảo ngữ câu điều kiện loại 3:

Had + S + (not) Vp2 …., S + would have + Vp2...

8. Mai is the prettier of the two girls.

So sánh hơn với cụm từ "of the two + N":

S + be + the + hình thức so sánh hơn + of the two + N(s).

9. I've never seen a better film than this film.

Hoặc I've never seen such a good film.

nghĩa: Đây là bộ phim hay nhất mà tôi đã từng xem.

=> Tôi chưa bao giờ xem một bộ phim nào hay hơn bộ phim này. (Tôi chưa bao giờ xem một bộ phim hay như vậy.)

10. There are over 800 students in my school.

11.That plane is said to have crashed into the mountains.

Câu bị động với các động từ như: say; think;...

CĐ: S1 + say (S) + that + S2 + V...

BĐ: It is said that + S2 + V.../ S2 + to be + said + to V/ to have PP. (to have PP nếu động từ ở mệnh đề sau trước "thì" so với mệnh đề trước)

12. She tries to learn English well with a view to communicating with foreigners. 

Cấu trúc:

with a view to + Ving: nhằm làm gì, với ý định làm gì, với hi vọng làm gì 

13. I have taugh English for three years.

14. Lan is the most intelligent person (student) in my class.

So sánh nhất với tính từ dài : the + most + adj...

15. This exercise was so difficult that we couldn't do it.

Cấu trúc:

so...that...(quá...đến nỗi mà ): S + V + so + adj/adv + that + Clause

16. Had you not helped me, I couldn't have passed the exam.

Cấu trúc đảo ngữ câu điều kiện loại 3:

Had + S + (not) Vp2 …., S + would have + Vp2...

17. I asked Nga when she would come back.

Câu hỏi gián tiếp : S + asked+Wh_+ S + V (lùi thì) .....

18. This house hasn't been bought.

19. She wouldn't have got wet if she had taken an umbrella.

20. He shouldn't have bought that house.

Cấu trúc :

should have + Vp2 : lẽ ra đã nên

=> shouldn't have Vp2 : lẽ ra đã không nên