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 + V3/ed + for/since + time 

--> S + started / began + to V / Ving 

--> It is / has been + time + 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. Lan hasn't washed her hair for two days.

2. It has rained since I came home.

3. They haven't watched a horror film since July.

4. She has lived in this town since 2010.

5. I haven't learned new words for some weeks.

6. Our teacher has never given us homework before.

7. He hasn't seen a car accident before.

8. My father hasn't gone to the beach since he was 50.

`color{orange}{~LeAiFuRuiHuiBao~}`