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15. My teacher said (that) I should read these books.

16. Her classmate said (that) Lan was the most intelligent girl in our class.

17. They told us (that) their friends would get the award for their highest scores.

18. He said (that) he would go to school by bus the next day.

19. My grandparents said (that) we would travel around the world by plane.

20. Phong said (that) he needed to learn more vocabulary.

21. Lan said (that) she had to do more grammar exercise.

22. Tinh said (that) Lien might go shopping with her friends.

23. The girls said (that) they ought to finished their homework that night.

24. The leader of the group said (that) they would play with their best to win the prize for their sc-hool.

25. His brother said (that) he could use his brother's computer that day.

26. The coach said (that) the players had to train harder for the next match.

27. Tam's sister said (that) Tam ought to helped she to clean the house.

28. Hoa's parents said (that) they would visit Hoa that summer.

29. Mai said (that) she couldn't go to the movies with Nam.

30. Mary told her friend (that) she would expect to see her friend next Wednesday.

Giải thích cách làm:

Công thức câu Reported speech: - S + say(s)/said + (that) + S + V.

                                                      - S + told + O + (not) to-infinitive.

Các thay đổi từ câu Trực tiếp -> Gián tiếp:

will -> would

can -> could

must/ have to -> had to

may -> might

here -> there

now -> then/ at that moment

today/ tonight -> that day/ that night

tomorrow -> the next day

next week -> the following week

yesterday -> the previous day/ the day before

last week -> the week before

ago -> before

Chúc bạn học tốt!!!