21. It took her 20 minutes to come here. It take sb time to do sth
- She spent 20 minutes coming here. Spend time doing sth
22. It is the first time they have chatted with me. It is the first time + S + have/has + V2
- Never before have they chatted with me. Never before + have/has + S + V3/ed
23. He lives on the farm. / He used to live on the farm. (Đề sai, usually thì HTĐ, không thể có động từ-ed) S + Vs/es + O / Used to do sth
- He doesn't live on the farm anymore. Not do sth anymore
24. How long have you started Iearning / learnt English? Begin/Start doing sth
25. He has played this game since 2019. S + have/has + V3/ed + since + time
26. They haven't sit in this room for 3 weeks. Have/Has + V3/ed + for + time
- The last time they sit in this room was 3 weeks ago. The last time + S + V3/ed + was + time + ago
- It is 3 weeks since they Iast sit in this room. It is + time + since + S + last
27. We haven’t read this this book since October. S + have/has + V3/ed + since + time
- The last time we read this book was in October. The last time + S + V3/ed + was + time + ago
- It is October since we last read this book. It is + time + since + S + last