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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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1. The last time I went to a concert was over a year ago.

2. I haven't really enjoyed myself since your birthday party.

3. My father hasn't seen his brother for nearly 20 years.

4. Tom has gone to Scotland since last Friday.

5. How long is it since you rode a bike?

6. I haven't gone swimming since I was in France.

7. It's weeks since you last tidied up this room.

8. He hasn't been in touch with me for three weeks.

9. Mr. John last visited France in 1990.

10. It's three weeks since it last rained.

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

`color{orange}{~LeAiFuRuiHuiBao~}`