A. Transformation

1. We haven't seen her since Christmas Day

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

3. It has rained for an hour

4. The last time we visited our grandparents was two months ago

5. I began studying English three years ago

6. It's nearly five years since my brother last saw his best friend

7. How long have you learned French?

8. Jane is the same height as her elder sister

9. Those houses are larger than these houses

10. My backpack is different from yours