1. They said that they were very tired.
2. He said to me that he was going to my house.
3. He said to Mary that he would take her to his house.
4. The mother asked her son if he was sorry for what he did.
5. She asked if I wanted to buy any second-hand books.
6. They said that they could go to the airport by taxi.
7. He asked Hong if she would have time to play regularly.
8. My mother said to me that I worked very hard.
9. He said that they had a lift but very often it didn't work.
10. She asked Son why he didn't like pop music.
11. He said that he was going to Brighton the next day.
12. Mary asked Margaret if she was hungry.
13. He asked Thao if she went to school every day.
14. The teacher asked me if I could answer that question.
15. My mother told me to write those lessons carefully.
16. Susan said that they would have to go now.
17. I asked his mother if he went to work by bus.
18. Minh asked Hong if her brother could swim.
19. He told me not to forget to turn off the lights.
20. My mother asked if the food was good.
21. Hoa said to Binh that she had something to show him.
22. He said to me that he would come with me as soon as he was ready.
23. The son said that he was going away the next day, mom.
24. He asked if they taught music.
25. He said to me that he didn't think my father liked him.
26. She said to Nam that she would wait until he came.
27. My brother said that he must write some letters then.
**Giải thích:**
- Trong câu gián tiếp (indirect speech), chúng ta thường thay đổi thì của động từ, đại từ và một số từ chỉ thời gian hoặc địa điểm để phù hợp với ngữ cảnh.
- Ví dụ, "I am" trở thành "he was", "tomorrow" trở thành "the next day", và "you" có thể trở thành "he" hoặc "she" tùy thuộc vào người nói.
- Câu hỏi được chuyển thành câu khẳng định hoặc câu hỏi gián tiếp, và các từ hỏi như "why", "if" được sử dụng để giữ nguyên ý nghĩa.