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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