Cách chuyển câu QKĐ -> HTHT:
- When did+ S + V-bare ..?= How long is it since S + V-qk..?
- The last time +S+ V-qk +was +tgian +(ago)
= S +last +V-qk...
= S+ have/ has +(not)+ P2 ...+for/since + khoảng tgian/ mốc tgian..
= It's +tgian +since+ S +(last) +V-qk..?
- S + started/ began + to-V/ V-ing ...
S + have/ has + P2 +for/since + khoảng tgian/ mốc tgian..
4.The Times was first printed two hundred years ago.
=>.It is two hundred years since The Times was first printed
5.I last saw her 5 years ago.
=> .It’s 5 years since I last saw.……..
11.My parents have been working in this factory for over 20 years.
=>Over 20 years ago since my parents worked in this factory……..
12.He has been working in this factory for 15 years.
=>.He started…to work in this factory 15 years ago…
14.We have been learning English for one year.
=>.We began learning English one year ago
15.I have been studying business administration in London for 2 years
=>.I beganstudying business administration in London 2 years ago.
40.When did he start working for the company?
=>How long ..is it since he started working for the company...?