$1.$ I have known her for a long time.

→ Công thức: S + have/ has + VpII.

Cụm từ for a long time được dùng trong câu khẳng định.

$2.$ They have bought a new house in April.

→ In đi với tháng, mùa, năm

$3.$ My family has been here since Christmas.

→ Since + mốc thời gian.

$4.$ We haven't seen each other since 10 years.

$5.$ How long have you ever visited Ha Long Bay?

→ Have you ever: cấu trúc câu hỏi phổ biến trong Tiếng anh dùng để hỏi từ khoảng thời gian bạn sinh ra cho đến bây giờ bạn đã làm việc đó chưa.

$6.$ I have written a letter for 2 hours.

→ For + khoảng thời gian

1. I / know / her / a long time

$\rightarrow$ I have known her for a long time.

2. They / buy / new house / April

$\rightarrow$ They have bought the new house in April.

3. My family / be / here / Christmas

$\rightarrow$ My family has been here since Christmas.

4. We / not see / each other / 10 years

$\rightarrow$ We haven't seen each other for 10 years.

5. How long / you ever / visit / Ha Long Bay ?

$\rightarrow$ How long have you ever visited in Ha Long Bay?

6. I / write / letter / 2 hours

$\rightarrow$ I have written a letter for 2 hours.