1. He said to her that she was his friend (hiện tại đơn sang quá khứ đơn)
2. John said to his mother that he didn't know how to do that exercise (hiện tại đơn sang quá khứ đơn, "this" sang "that")
3. Paul said that he had to go home then ("must" sang "had to", "now" sang "then")
4. John said that he had finished studying his lesson (hiện tại hoàn thành sang quá khứ hoàn thành)
5. The tourists said that they were having a wonderful time there (hiện tại tiếp diễm sang quá khứ tiếp diễn, "here" sang "there")
6. Tom said that his teacher wanted to have a talk with me the following morning (hiện tại đơn sang quá khứ đơn, "tomorrow morning" sang "the following morning")
7. Tom said that he was visiting the museum the following day ("tomorrow" sang "the following day")
8. He said to me that he had sth to show me (câu này mk nghĩ là "show me" ko phải "show to me"
9. He said they would wait until he came back ("will" sang "would")
10. He said to me I could keep that one if I liked ("can" sang "could")
11. Paulo said that he wanted to buy a gift for his father
12. The man informed us that the store wasn't going to open on New Year’s Day
13. She said that she had spent a summer there in that village (quá khứ đơn sang quá khứ hoàn thành)
14. The students said that they would be sitting for their exams the following Monday ("will" sang "would", "next Monday" sang "the following Monday")
15. The nurse said to the Doctor that the patient in that room had not obeyed his orders
16. Mr. Brown said to Susan that the house would seem so empty without her and Tim
17. David told me if she had known the truth, she would have been happy
18. The manager said to John that he had to finish the work by 5 o'clock
19. Our teacher said that The Second World War had broken out in 1939
20. Mother said that she thought it wouldn't rain the following day
CHÚC BN HỌC THẬT TỐT!