19. Minh said to me: "You are my best friend" → Minh told me that I was his best friend.

20. John said to his mother: "I don't know how to do this exercise". → John told his mother that he didn't know how to do that exercise.

21. "I have left my watch at home so I don't know the time" said the man. → The man said that he had left his watch at home so he didn't know the time.

22. He said to me: "I don't know you returned so I don't come to see you". → He told me that he didn't know I had returned so he didn't come to see me.

23. Our teacher said to us: "The earth goes around the sun". → Our teacher told us that the earth goes around the sun.

24. Our teacher told us: "New York is bigger than London" → Our teacher also told us that New York is bigger than London.

25. Bill said: "I can do this exercise now." → Bill said that he could do that exercise then.

26. she said: "My brother won't let me take his car → She said that her brother wouldn't let her take his car.

27. "I don't love you any more", Eric said to his girlfriend. → Eric told his girlfriend that he didn't love her anymore.

28. She said, "I go to the cinema today." → She said that she went to the cinema that day.

29. He said, "I am going to write a test tomorrow." → He said that he was going to write a test the following day.

30. You said, "I will do this for him." → You said that you would do that for him.

31. She said, "I am not hungry now."→ She said that she wasn't hungry then.