11. She said she couldn't find her umbrella.

12. Tom said his friend was coming to visit him the following week.

13. Mrs. and Mr. Black said they had to overcome that difficulty.

14. The boy said to the neighbor he was going on holiday the next day.

15. The teacher told his class to finish all the exercises before next week.

16. Peter said he enjoyed looking at himself in the mirror.

17. Nam said he was told to be at school before 7 o'clock.

18. Lan told Mrs. John she would be very busy the next day.

19. They said their students would have a meeting the following week.

20. Phong said his parents were very proud of his good marks.

=>
11. She said that she couldn't find her umbrella.
12. Tom said that his friend was coming to visit him the following week.
13. Mrs and Mr Black said that they had to overcome that difficulty.
14. The boy said to the neighbor that he was going on holiday the following day.
15. The teacher told his class that they would have to finish all those exercises before the following week.
16. Peter said that he enjoyed looking at himself in the mirror.
17. Nam said that he was told to be at school before 7 o'clock.
18. Lan told Mrs John that she would be very busy the following day.
19. Thye said that their students would have a meeting the following week.
20. Phong said that his parents were very proud of his good marks.
Câu tường thuật -> lùi thì
Can't -> couldn't
HTTD -> QKTD
Must -> had to
Will -> would HTĐ -> QKĐ