Bài 15: Chuyển các câu sau từ thì HTHT sang thì QKĐ sao cho có nghĩa không thay đổi. 1. We have learned English for 10 years. 2. It has been a long time since we last met. 3. Ms.Ann hasn't taken part in any voluntary programs for 4 years. 4. I haven't met my family since last Christmas. 5. How long have you lived here? 6. The volunteers have provided free food and fresh water to homeless people since yesterday. 7. The doctor has quitted his job in the local hospital and moved to the central hospital for 2 days. 8. The children haven't had a long vacation since last year. 9. They haven't visited their parents for 3 month. 10. It has been 2 years since we broke up. (Làm đi đúng và chính xác mình vote 5 sao và chọn là câu trả lời HN.) *20₫ đấy nhé

`Đáp` `án:`

1. We started learning English 10 years ago.

2. We haven't met for a long time.

3. The last time Ms. Ann took part in some voluntary programs was 4 years ago.

4. The last time I met my family was last Christmas.

5. When did you move here? / When did you start living here? 

6. The volunteers started providing free food and fresh water to homeless people yesterday.

7. The doctor quitted his job in the local hospital and moved to the central hospital 2 days ago.

8. The last time the children had a long vacation as last year.

9. The last time they visited their parents was 3 months ago.

10. We haven't broken up for 2 years. 

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Các công thức đổi HTHT - QKĐ

Loại 1: 

S + has/have + not + V3/ed + for/since + time 

→ S + last + V2/ed 

→ The last time + S+ V2/ed + was + time + ago

→ It is / has been + time + since + S+ (last) + V2/ed 

Loại 2: 

How long + has/have + S+ V3/ed?

→ When + did + S + V1?

→ How long is it + since + S+ V2/ed ?

→ How long ago + did + S + start / begin + to V / Ving? 

Loại 3:

S + has/have + V3/ed + for/since + time 

→ S + started / began + to V / Ving 

→ It is / has been + time + since + S+ V2/ed 

Loại 4: 

S + has/have + not/never + V3/ed + ... before

→ This/It is the first time + S+ has/have+ V3/ed

Loại 5:

When + did + S + last + V1?

→ When + was the last time + S + V2/ed?