6. The last time they visited me was 5 months ago.

- S+ has/have not PII+ for+ khoảng thời gian.= The last time+ S+ V2+ was+ thời gian+ ago.

7. Classes will be held in places like restaurants or supermarkets.

- Câu bị động thì tương lai đơn: will be PII.

- by them bỏ vì they là đại từ nhân xưng.

8. If Peter didn't have a lot of homework, he would go to the party.

- Câu điều kiện loại 2 diễn tả hành động trái ngược với hiện tại: If+ S1+ V2, S2+ would+ V...

9. Minh has collected stamps since 2010.

- Chuyển đổi từ quá khứ đơn-> hiện tại hoàn thành: S+ started/ began+ to V+ in+ thời gian-> S+ has/have PII+ since+ mốc thời gian.

10. This is the most romantic story I have ever seen. 

- S+ has/ have never PII such+ (a/an)+ adj+ N....-> This is the adj_est/ most + adj+ S+ has/have ever PII.

1 The last time they visited me was five years ago. ( The last time + quá khứ đơn + was + thời gian + ago ).

2 Classes will be held in places like restaurants or supermarkets. ( Câu bị động tương lai: S + will + be + Vpp )

3 If Peter didn’t have a lot of homework, he would go to the party.

4 Minh has collected stamps since 2010. ( S + have/has + Vpp + since + mốc thời gian ).

5 This is the most romantic story that I have seen.