1 I have learnt English for 10 years.

2 She hasn't mether aunt since she was 8 years old.

3  I haven't been to Ho Chi Minh City for 2 years.

4 She has studied ballet since she was five.

5 I have read the book since last night.

6 He hasn't sent me postcards since he was in France. 

7  She has been writing the report for 45 minutes.

8 He began teaching the children in S.O.S village 2 years ago.

9  I haven't eaten eel soup since I was in Vietnam.

10 He has had the car for two weeks. 

`<=>` S + began/started + Ving + O + time: Ai đó bắt đầu làm gì từ khi nào.

`<=>` S + have/has + Vpp + O + time: Ai đó đã làm gì được bao lâu.

`1.` I have learnt English for `10` years.

`2.` She hasn't met her aunt since she was `8` years old.

`3.` I haven't gone to Ho Chi Minh City for `2` years.

`4.` She has studied ballet since she was `5.`

`5.` I have read the book since last night.

`6.` He hasn't sent me postcards since he was in France. 

`7.` She has written the report for `45` minutes.

`8.` He began to teach the children in `S.O.S` village `2` years ago.

`9.` I haven't eaten eel soup since I was in Vietnam.

`10.` He has had the car for two weeks. 

`-------------`

`@`S + started/began + to V/V-ing + time + ago `|` when + clause

`=` S + have/has + P2 + for + time `|` since + clause

`@`S + last + Ved/V2 + time + ago `|` when + clause

`=` S + have/has not + P2 + for + time `|` when + clause