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 

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55. They haven’t written to each other for five years.

56. I last met my aunt when I was 10 years old.

57. They have studied English since they were in grade 3.

58. He has read books for two months.

`color{orange}{~LeAiFuRuiHuiBao~}`