6,we haven't met 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 the first time i have taken a bath since Monday
11,Samuel has kept a diary since 1997
12,we have learned EL for 5 years
13,i have lived in HCM city since i was 8
14,she started teach the children in this remote village 5 months ago
15,the last time he wrote was april
16,she last had a swim was 5years ago
17,the haven't talked to each other for 2 months
18,she hasn't seen her elder sister since 1999
19,it's year since she last wrote to me
20,it's ten years since Robert and Catherine were married
II,
1,arrested
2,went - has come
3,has already bought
