11.He used to play tennis better than now ( Used to + V )

12.It took me 20 minutes to walk to school ( S + take + time + to do sth )

13.She said that she was working for a big company ( Câu trần thuật : S + said + S + V [ lùi thì ] )

14.They have to check somebody on the roof ( Have to + V )

15.They have played tennis for five years ( Thì HTHT , Đặc điểm nhận dạng : for )

`#  TCV`

=>

11. He used to play tennis better than he does now.

-> used to V : đã từng

12. It took me 20 minutes to walk to school.

-> take sb time to V ~ spend time Ving

13. She said that she was working for a big company.

-> câu tường thuật, lùi thì (HTTD -> QKTD)

14. They are going to have the roof checked.

-> have sth V3/ed

15. They have played tennis for 5 years.

-> chuyển QKĐ sang HTHT, S have/has V3/ed, for + khoảng thời gian