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Cấu trúc chuyển đổi câu QKĐ à HTHT và ngược lại
in + mốc time
when S + V2/ed + O
since + mốc time
since + S + V2/Ved + O
- It’s + time + since + S + last + V2/ed + O
- The last time + S + V2/ed + … + was + khoảng time + ago.
Ex: a. I last visited my grandparents 6 months ago.
è I haven’t visited my grandparents for 6 months.
è It’s 6 months since I last visited my grandparents.
è The last time I visited my grandparents was 6 months ago.
I last read that book when I was at my friend’s home.
è I haven’t read that book since I was at my friend’s home.
- This is the first time + S + have/ has + V3/ed + O
- S + hasn’t/ haven’t + V3/ed + O + before
- S + has/ have + never + V3/ed + O + before
Ex: This is the first time I have watched this film.
è I haven’t watched this film before.
è I have never watched this film before.
in + mốc time.
since + mốc time.
Ex: I began learning English in 2020.
è I have learnt/learned English since 2020.
- When + did + S + Start/ begin + to Vo/ Ving …?
- How long + have/ has + S + V3/ed + …?
- How long + is it/ has it been + since + S + V2/ed + …?
Ex: When did you begin to learn English?
è How long have you learnt English?
è How long has it been since you learnt English?