Here are the reported speech transformations for the sentences provided:

17. The woman said that she had to go home then to make dinner.
18. Jim said that he would tell my mother he hadn't seen me.
19. She said that I was really a good friend of hers, Billy.
20. He said that he was going to town with his sister.
21. He said that he had gone to Dalat.
22. They said that they were students in that school.
23. Hai said to Trang that he loved her.
24. She said that they had finished their work.
25. She told me that she wanted to speak with me.
26. He said that he liked his uncle.
27. He told me that he would be there with me the next day.
28. The plumber told Mrs. Thu that she had to pay him ten thousand dong.
29. My mother told me that I should do my homework every day.
30. She said to her that she wanted her to go with her the following week.

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