6. She said that she had been very tired

7. She told Ben to be careful

8. She said that she would get herself a drink

9. He wondered me that why I hadn't phoned him

10. He said that he couldn't drive them home

11. She asked Peter if he preferred tea or coffee

12. She asked me where I had spent my holidays the year before

13. He advised her not to go too far

14. He wanted to know if I had been shopping

15. He told me not to make so much noise

Giải thích

Câu trần thuật: 

-Câu hỏi Yes/No_question: S asked/wondered... sb IF clause

-Câu hỏi Wh_question: S asked/wondered... sb Wh clause

Câu mệnh lệnh/nhắc nhở...:

S told/asked/reminded/... sb (not) to V

Lùi thì: QKĐ, HTHT > QKHT

            QKHT > QKHT

            HTHTTD > QKHTTD

            HTĐ > QKĐ

            will/can... > would/could...