1. I have known her since more than 10 years.

2. I haven't eaten anything since lunchtime.

3. Have you lived in this town for a long time?

4. Jill has been a good friend since we were at school together.

5. Have you seen Jack since the party last week?

CẤU TRÚC THÌ HTHT:     

- Câu khẳng định

Cấu trúc: S + have/ has + PII.

- Câu phủ định

Cấu trúc: S + haven’t/ hasn’t + PII.

- Câu nghi vấn

Q: Have/Has + S + PII?

A: Yes, S + have/ has.

      No, S + haven't / hasn't.

 DẤU HIỆU NHẬN BIẾT

just, recently, lately: gần đây, vừa mới

- already: rồi

- before: trước đây

- ever: đã từng

- never: chưa từng, không bao giờ

- yet: chưa (dùng trong câu phủ định và câu hỏi)

1. I have known her since more than 10 years.

2. I haven't eaten anything since lunchtime.

3. Have you lived in this town for a long time?

4. Jill has been a good friend since we were at school together.

5. Have you seen Jack since the party last week?