21. My dad gave up _________ (drink) alcohol 3 years ago.
22. We should learn English hard in order to _____________ (study) abroad.
23. Linh ______________ (not come) back yet.
24. Our dads should give up smoking so as to ____________ (live) healthily.
25. So far, we ______________ (be) at home for 3 months.
26. Huy’s mother ______________ (already know) his crush.
27. If I ______(be) you, I would stop littering rubbish.
28. If I were your mom, I ______________ (buy) you a big gift on this Children’s Day.
29. Tam (already know ) _____________ my mother
30. He said that he ( be) ________ a plumber.
31. If I ______(be) a doctor, I would help Covid 19 patients.
32. If she were India’s Prime Minister, she _____________ (order) city lockdown for at least 20 days.
33. While I _________________(run) home, I caught a rain.
34. While she ________________(cook), I ________________(clean) the floor.
35. By the time I got home, my mother ______________(cook) dinner. It’s so wonderful.
21. drinking ( give up + Ving: từ bỏ )
22. study ( in order to + Vinf: để mà -> chỉ mục đích )
23. hasn’t come ( yet: hiện tại hoàn thành )
24. live ( so as to + Vinf: để mà = in order to Vinf )
25. have been ( so far: hiện tại hoàn thành )
26. has already known ( already: hiện tại hoàn thành )
27. were ( if 2: If + S1 + V2/ed, S2 + would + Vinf )
28. would buy ( if 2: If + S1 + V2/ed, S2 + would + Vinf )
29. has already known ( already: hiện tại hoàn thành )
30. was ( câu trần thuật nên lùi thì )
31. were ( if 2: If + S1 + V2/ed, S2 + would + Vinf )
32. would order ( if 2: If + S1 + V2/ed, S2 + would + Vinf )
33. was running ( hành động đang diễn ra trong quá khứ: quá khứ tiếp diễn, hành động xen vào: quá khứ đơn )
34. was cooking – was cleaning ( hai hành động xảy ra cùng lúc trong quá khứ chia quá khứ tiếp diễn )
35. has cooked ( by the time + quá khứ đơn, quá khứ hoàn thành )