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. It is ages since I went to an Indian restaurant.

2. When did Helen and Robert get married? 

3. How long have you worked for this company?

4. It's ages since I last had a Chinese meal.

5. I didn't wear glasses until recently.

6. The last time I went to the cinema was two months ago.

7. Steve has learned the violin for a month.

8. Since hearing the result, Mary has felt more confident.

9. Nancy hasn't come here since 1996.

10. We haven't had a conversation for a long time./ We haven't talked for a long time.

11. He has lived in Hanoi since he was 9 years old.

12. I have worked for this company for three years.

13. This is the first time I have eaten Indian food.

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