1. Samuel has kept a diary since 1997.
2. We have learnt English for 5 years.
3. I have lived in HCM 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 swam 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 ten years since Robert and Catherine married.
11. They haven't deaned their room for two weeks.
12. John has had his hair cut for 6 months.
13. When did you last ride a bicycle?
14. When did he last write to you?
15. How long is it since he talked to you?
16. How long is it since you telephoned him?
17. It's the first time we've eaten this kind of food.
18. I have never seen this film before.
