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 + not/never + V3/ed + ... before

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

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1. It's the first time we have met such a kind person.

2. Is this the first time you have ever traveled to Thailand?

3. I have not seen my father for 10 years.

4. How long have you learned Vietnamese?

5. I have not gone to the cinema with my friends for nearly 8 months.

`color{orange}{~MiaMB~}`