1: Samuel has kept a diary since 1997
2: We have learned English for 5 years
3: I have lived in Ho Chi Minh city since I was 8
4: She started teaching the children in this remote village 5 months ago
5: The last time he wrote to me was in April
6: She last had a swim 5 years ago
7: They haven't talked to each other for 2 months
8: She hasn't seen her elder sister since 1999
9: It's years since she wrote to me
10: It's 10 years since Robert and Catherine were married
11: They haven't cleaned their room for 2 months
12: John hasn't had his hair cut for over 6 months
13: It's the first time we've ever eaten this kind of food
14: I've never seen this film before
15: He hasn't gone abroad before
