1. We haven't seen her since last Christmas day.

2. This is the first time I ate this kind of food.

3. It has rained for an hour.

4. The last time we visited my grandfather was two months ago.

5. I began studied English three years ago.

6. It's the first time when my brother last seen his best friend nearly five years ago.

7. How long have you learnt English ?

8. We have lived here for fifteen years.

9. She hasn't visited me for five years.

10. I haven't written to my uncle since last July.

11. We have become close friend long time ago.

12. Minh has collected stamps since 2000.