`1`. He said to his friends that he had to go home then.

- Câu tường thuật với câu trần thuật : S + said to/told + O + (that) + S  + V (lùi thì).

- I -> he ; must -> had to ; now -> then

`2`. She told me that she would come and see me as soon as she could.

- I -> she ; will -> would ; you -> me ; can -> could

`3`. Tom said John wanted to come there but he wasn't very well.

- Câu tường thuật với câu trần thuật : S + said (that) + S  + V (lùi thì).

- Hiện tại đơn -> Quá khứ đơn : S + Ved/ V2 ; S + was/ were + (not) + ...

`4`. Hoa said she had to wear uniform when she was at school.

- I -> she ; have to -> had to ; Hiện tại đơn -> Quá khứ đơn

`5`. Nam told Ba that he could speak English and French fluently.

- I -> he ; can -> could

`6`. Mr Thanh said to me that Mrs Quyen would come to san Francisco the next day.

- tomorrow -> the next day/ the following day/ the day after

`7`. Mrs Vui said the washing machine was broken.

- Bị động thì hiện tại đơn -> Bị động thì quá khứ đơn: S + was/ were + Vpp + (by O).

`8`. Susan asked Lan is Hoi An was an ancient city in VN.

- Câu tường thuật với Yes/No-questions: S + asked/ wanted to know/ wondered/... + (O) + if/whether + S + V (lùi thì)

- Hiện tại đơn -> Quá khứ đơn

`9`. Miss Ngan asked me if Phong Nha cave was in Quang Binh province.

- Hiện tại đơn -> Quá khứ đơn