1. He hasn't gone abroad before.

2. She has driven for 1 month.

3. We have eaten since it started to rain.

4. I haven't had my hair cut since I left her.

5. She hasn't kissed me for 5 months.

6. We haven't met her for a long time.

7. How long have you had it ?

8. I haven't had such a delicious meal before.

9. The last time I saw him was 8 days ago.

10. It is monday since I last took a bath.

1. This is the first time I have seen him
=>I have never seen him before. 
The first time : lần đầu tiên
Never ...before : chưa bao giờ trước đây
2. I started / begun studying English 3 years ago. 
=> I have studied English for 3 years.
3. I last saw him when I was a student
=> I haven't seen him since I was a student.
Last : lần cuối
Since : từ khi
4. The last time she went out with him was two years ago
=> She hasn't gone out with him for two years.(
5. It's ten years since I last met him.
=> I haven't met him for ten years . 
6. When did you buy it ? 
=> How long have you bought ? 
when : thì dùng quá khứ đơn
How long : thì dùng hiện tại hoàn thành

$\textit{Minz}$

1)  He hasn’t  gone abroad before

Cấu trúc

S + have/has + not + P2 + before = This is the first time + S + Ved

2) She has driven for a month

3)  We have eaten since it started to rain.

Cấu trúc 

(S + started / began + V_ing / to-V = S + have P.P / have been + V_ing)

4 I haven't had my hair cut since i left her

Cấu trúc

S+ last+ved/v2 viết lại với hiện tại hoàn thành

5 She hasn’t kissed me for 5 months

6 We haven't  met for a long time

Cấu trúc

It's + thời gian + since+S+V+O=S+have/has+not+V(P2)

7 How long have you had it

Cấu trúc

When + did + S + V? = How long + have/has + S + P2?

8 I haven’t had such a delicious meal before

Cấu trúc

This is the first time .... Hiện tại hoàn thành = S + have/has + not + V( HTHT) + O + Before

9  The last time I saw him was 8 days ago

10 It is for 2 days since I last took a bath.

( Vì hôm nay là thứ 4 nên đã 2 ngày không tắm. Tuy nhiên số ngày sẽ thay đổi )

$@chienbinhkieuhanh$