chuyển sang hiện tại hoàn thành

Type 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 

Type 2: 

S + has/have + V3/ed + for/since + time

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

--> It is/ has been + time + since + S+ V2/ed

Type 3: 

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

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

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13. I have never eaten such a delicious pancake in my life before.

14. It's 30 minutes since she went to school.

15. I have not seen Lucy since my last birthday party.

16. This is the first time he has read a good self-help book. 

17.

Jane last came back to her country 5 years ago.

Jane has not come back to her country for 5 years.

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