=>
1. The poem was written by Clement Clarke Moore in 1823.
-> bị động QKĐ was/were V3/ed
2. You should send Christmas cards a week before Christmas Day.
-> bị động chuyển sang chủ động S should V
3. The children said that they were waiting for the school bus.
-> câu tường thuật (lùi thì, HTTD -> QKTD)
4. This machine hasn't been used for years.
-> bị động HTHT have/has (not) been V3/ed
5. It is impossible to grow roses in such poor ground.
-> it is adj to V
6. Recycled plastic is used to make toys and utensils.
-> bị động HTĐ is/am/are V3/ed
7. She asked me to turn off all the lights when I went out.
-> asked sb to V : yêu cầu ai làm gì
8. I haven't played tennis since 1990.
-> chuyển QKĐ sang HTHT, S have/has (not) V3/ed, since + mốc thời gian
9. Jane told me that she would give me her phone number so that I could call her.
-> câu tường thuật (lùi thì, will -> would/can -> could)
10. Would you mind not smoking in the kitchen?
-> would you mind (not) Ving? : bạn có phiền (không)..?