`1,` I haven’t watched “The Twilight Saga” series for `5` years

`2,` How long has our teacher task us with a market research project ?

`3,` The last time I met him was `3` days ago

`4,` She has worked as a recruiter for `3` months

`5,` He has played ice hockey since he was `6` years old

`6,` I last went to Ha Nam `2` years ago

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           Chuyển QKĐ `->` QKHT

`@` S + began/started + V-ing/to V + ... + t/gian + ago

`->` S + have/has + P2 + ... + for + t/gian

`@` S + last + V2/ed + ... + t/gian + ago

`->` S + have/has + not + P2 + ... + for + t/gian

`->` The last time + S + V2/ed + ... + was + t/gian

`@` When + did + S + start/begin + to V/V-ing ... ?

`->` How long + have/has + S + P2 ... ?

-Đáp án:

1. I haven't watched"The Twilight Saga" series for 5 years.

2. How long has our teacher tasked us with a market research project?

3. The last time I met him was 3 years ago.

4. She has worked as a recruiter for 3 months.

5. He has played ice hockey since was 6 years old.

6. I last went to Nam Ha 2 years ago.

7. I have never seen such a professional gamer before.

-Giải thích:

1.Cấu trúc: The last time+S + V_ed/V2...+was + Khoảng thời gian + ago.

-> S+ have/has + not +V_ed/V3...+ for + Khoảng thời gian.

2.Cấu trúc:When + did + S + V_inf...?

-> How long + have/has +S + V_ed/V3...?

3.Cấu trúc:S+last + V_ed/V2....+khoảng thời gian + ago

-> The last time + S + V_ed/V2...+ was + khoảng thời gian + ago.

4.Cấu trúc:S + started+ V_ing....+ Khoamhr thời gian + ago.

-> S + have/has+ V_ed/V3 + for + khoảng thời gian.

5.Cấu trúc:S+ began+V_ing...+when+Mệnh đề quá khứ đơn.

-> S+ have/has +V_ed/V3 + since + mệnh đề quá khứ .

6.Cấu trúc:It is + Khoảng thời gian + since+ mệnh đề quá khứ đơn.

-> S+ last + V_ed/V2...+khoảng thời gian + ago.

7.Cấu trúc:This is the first time+ S + have/has + V_ed/V3...

-> S + have/has + never+ V_ed/V3...+before.