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. 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.

9. I haven't talked to him since his birthday.

10. They haven't worked in the garden for three months.

11. The children have slept since 9.00.

12. Mai has written her lesson for two hours.

`color{orange}{~LeAiFuRuiHuiBao~}`