"How much do you think it will cost?" he said to me -> He asked me

`=>` He asked me how much I thought it would cost 

`-` Câu tường thuật -> lùi thì (HTĐ -> QKĐ)

*Trong câu có sự biến đổi gồm: think -> thought; will -> would

`-` Câu tường thuật với WH - question có cấu trúc sau:

`=>` S + asked + (O) + Wh - question + S + V lùi thì ...