=>
29. Mai is the youngest in the group.
-> so sánh nhất the adj-est
30. I asked them where they were going for their holidays.
-> câu tường thuật dạng WH questions: asked sb + từ để hỏi + S V(lùi thì, HTTD -> QKTD)
31. The luggage is so heavy that she can't carry it.
-> so adj that: quá...đến nỗi
32. If he weren't tired, he could score some goals.
-> câu đk loại 2: If S V2/ed, S would/could V
33. I suggest taking the train./I suggest that we should take the train.
-> suggest Ving ~ suggest that S should V: đề nghị, đề xuất
34. He asked me why I didn't go with him.
-> câu tường thuật: asked sb + từ để hỏi + S V(lùi thì, HTĐ -> QKĐ)
35. Lan used to stay up late when she was young.
-> used to V: đã từng
36. Do you spend 3 hours doing this task?
-> spend time Ving ~ take sb time to V
37. If I have enough money, I will/can buy this bike. (câu này viết với điều kiện loại 2 hợp lí hơn: If I had enough money, I could/would buy this bike)
-> câu đk loại 1: If S Vs/es, S will/can V
38. Because I'm not tall, I can't play basketball.
> because S V: bỏi vì
39. It is interesting to learn English.
-> it is adj to V
40. The question hasn't been answered yet.
-> bị động HTHT have/has (not) been V3/ed