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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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2. How long have you studied English? 

3. It's five months since she last celebrated her birthday.

4. The last time we ate out was a month ago.

5. She moved to Da Nang five years ago.

6. Mr Nam has taught English at Da An secondary school for 4 years.

7. Quang has never herded the buffaloes before. 

8. The last time I visited my grandparents was three months ago.

9. I started working in this company at least 10 years ago. 

10. I have not talked to Hoa for 3 months. 

11. When did you start living in this house? 

12. The last time we went to the concert was over a year ago.

13. We haven't seen our grandfather for two years.

14. It is 10 years since he last came back to his hometown.

15. My father has not seen my uncle for nearly twenty years.

16. It is 9 months since she last went out with him.

17. When did you buy this bicycle?

18. When did Nam collect coins? 

19. How long has she worked here?

20. When did you last sing this song? 

21. How long is it since he last talked to you? 

`color{orange}{~MiaMB~}`