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: 

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

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

------------------------------------------------------------------

2. This is the first time I have spoken to a foreigner.

3. This is the first time he has been here.

4. It's four years since Robert and Catherine got married.

5.

- It's six months since Mary last met her uncle.

- The last time Mary met her uncle was six months ago.

6.  

- It's two months since I last visited my grandparents.

- The last time I visited my grandparents was two months ago.

7. I have never tasted such a delicious cake before.

8. This is the first time she has seen a real tiger.

`color{orange}{~MiaMB~}`