27. You don't need to water the tree every day (It + is/was + not necessary + for s.one to do s.th = S.one + do/does/did + not + have to/need + to do s.th)

28. There is less soup in my bowl than there is in yours (chén bạn nhiều hơn chén tôi `->` chén tôi ít hơn chén bạn; so sánh ít hơn danh từ: S + V + less + N + than + S2 (+ V)

29. What is the price of the yellow dress? (Hỏi giá: How much + do/does/did + S + cost? = What is/was + the price of + S?)

30. Don't forget to post this letter for me (Remember = Don't forget; forget to do s.th: quên việc cần làm)