`11`. She asked me how much the dictionary cost.

- Lùi thì : hiện tại đơn `->` Quá khứ đơn $(+)$ S + Ved/ V2

`12`. The policeman asked the little boy what his name was.

- Tính từ sở hữu : your `->` his

- Lùi thì : Hiện tại đơn `->` Quá khứ đơn $(+)$ S + was/ were + ...

`13`. Paul asked Mary when she would get back from London.

- Đổi ngôi : you `->` she

- Lùi thì : will `->` would

`14`. They asked him how he had got into the house.

- Đổi ngôi : you `->` he

- Lùi thì : Quá khứ đơn `->` Quá khứ hoàn thành

`15`. She asked Trung how long it took to get to Dalat.

- Lùi thì: Hiện tại đơn `->` Quá khứ đơn

* Câu tường thuật với WH-question : S + asked/ wanted to know/ wondered/... + (O) + WH-word + S + V (lùi thì)

`-` Tường thuật NV ( Wh ) :

`=>` S + asked + O + wh + S + V ( lùi thì )

`-` HTĐ `->` QKĐ : S + Ved / V2 `-` S + was / were + adj / n

`-` QKĐ `->` QKHT : S + had + VpII 

`-` TLĐ `->` TLTQK : S + would + V

`11`.She asked me how much the dictionary costed

`12`.The policeman asked the little boy what his name was

`13`.Paul asked Mary when she would get back from London

`14`.They asked him how he had got into the house

`15`.She asked Trung how long it took to get to Dalat

`\text{# TF}`