1. The last time we saw her was on Christmas day

⇒ We haven't seen her since Christmas day

2. I haven't eaten this kind of food before

⇒ It is the first time I have ever eaten this kind of food

3. It started raining an hour ago

⇒ It has rained for an hour

4. We haven't visited my grandfather for two months

⇒ The last time we visited my grandparents was two months ago

5. I have studied English for three year

⇒ I started studying English three year ago

1 . We haven't seen hết since Christmas day

( * hết của bạn là gì đấy ???? )

2 . This is the first time I've ever eaten this kind of food

3 . tại ninh là gì hả bạn ????

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

5 .  I started studying English three years ago

p/s : * Chỉnh lại lỗi chính tả giùm mik nhé