`1.` I haven't eaten this cake before

`-` Cấu trúc: S + have/has + Vpp + ... 

`2.` It's age since he last chatted with his classmates through the internet

`-` Cấu trúc: It's + thời gian + since + S + Ved/Vc2 + ...

`3.` Is this the first time you have played a computer game ?

`-` Cấu trúc: S + have/has + Vpp

`4.` We haven’t each other for 10 years

`-` Cấu trúc: S + have/has + Vpp + ... 

`5.` It's over 20 years since he last came back to his home village.

`-` Cấu trúc: It's + thời gian + since + S + Ved/Vc2 + ... 

1. This is the first time I have eaten this cake.

`=>`I haven't eaten this cake before.

Cấu trúc : It's the first/second/last time S + have+has +VPII.

2. He hasn’t chatted with his classmates through the Internet for ages.

`=>`It's ages since he last chatted with his classmates through the Internet.

-Thì hiện tại hoàn thành

3. Have you ever played a computer game before?

`=>`Is this the best computer you have ever had?

Câu hỏi có phải lần đầu tiên (thì hiện tại hoàn thành)

4. The last time we met each other was ten years ago.

`=>`We haven't met each other for 10 years

Cấu trúc : It's the first/second/last time S + have+has +VPII.

5. He hasn’t come back to his home village for over 20 years now.

`=>`It's over 20 years since he last come back to his home village

Viết lại câu thì hiện tại hoàn thành với :

since: mốc thời gian

for: khoảng thời gian

`#knguy`