`1 .` The last time we saw her was on Christmas day .
`->` We haven't seen her since Christmas day.
`2 .` The last time she visited me was five years ago.
`->` She hasn't visited me for five years.
`3 .`The last time she took a bath was on Monday.
`->` I haven't taken a bath since Monday.
` 4 .` The last time she visited me was five years ago 
`->` She hasn't visited me for five years.
` 5 .` We haven't visited my grandfather for two months 
`->` The last time we visited our grandfather was two months ago.

`->` Giải thích cấu trúc viết lại câu :

S + last + V2 + time+ ago

`<=>`  S + have/ has + not + for + time.

`<=>`  It’s + time + since + S + last + V2.

`<=>` The last time + S + V2 + was + time + ago.

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

2. She hasn't visited me for 5 years.

3. She hasn't taken a bath since Monday.

4. She hasn't visited me for 5 years.

5. The last time we visited my grandfather was 2 months ago.

Chúc bạn học tốt :3

# Yumi