1,we have learnt english for 2 years
2,we have taught english in this school for 5 years
3,she has teached in this school for 5 years
5,I started learning english 2 years ago
4,i started living in Hue when i was a 11 years old gril
6,she started teaching in this school 6 years ago
7,she has never came here since yesterday
8,they has bougt that house since 1990
9,i have not seen her for 3 years
10,he has not spoken F for 2 years
11,he has not met her since last summer
