Các công thức đổi HTHT - QKĐ

Structure 1: 

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 

Structure 2: 

How long + has/have + S+ V3/ed?

--> When + did + S + V1?

--> How long is it + since + S+ V2/ed ?

Structure 3:

S + has/have + V3/ed + for/since + time 

--> S + started / began + to V / Ving 

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

Structure 4: 

S + has/have + not/never + V3/ed + ... before

--> This/It is the first time + S+ has/have+ V3/ed

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1. She has lived in Da Lat for 4 years.

2. My son has studied English since he was young.

3. This is the first time I have ever eaten this kind of food.

4. This is the most beautiful girl Lan has ever seen.

5.  She has never read this book before.

6. My sister has learnt for 2 years.

7. My brother hasn't had his car repaired since I left him.

8. How long has he had it?

9. The last time I saw my grandmother was 6 months ago.

10. He last took a bath on Monday.

11. She hasn't lived a different city for six months.

12. She hasn't bought fast foods in KFC for 2 years.

13. How about going to the market to buy some fresh vegetables.

How about + Ving?đưa ra ý kiến, đề nghị

14. Why don't we go to the cinema this weekend.

Why don't we + V1? đưa ra ý kiến, đề nghị

15. Don't forget raise your knees high when you jog on the spot.

remember (nhớ) = not forget + to V: (đừng quên)

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