`5.` Lien told to her brother that he ought to clean his room.

`***` Câu tường thuật với statements:

S + said to sb that/told to sb that + S + V (lùi thì)

`-` Đổi ngôi: you `->` he, your `->` his

`6.` The teacher asked me where my father worked.

`***` Câu tường thuật với WH- ques:

S + asked/wondered/wanted to know + WH- + S + V (lùi thì)

`-` Lùi thì: HTĐ `->` QKĐ

`-` Đổi ngôi: your `->` my

`7.` A tourist asked me how far it was from HCM City to Vung Tau.

`-` Lùi thì: HTĐ `->` QKĐ

`-` Dùng 'asked me' nếu câu không nói đến người được hỏi cụ thể, hoặc không dùng tân ngữ 'me' cũng được.

`8.` Tam's friend asked him how long he would stay in England.

`-` Lùi thì: will `->` would

`-` Đổi ngôi: you `->` he

`9.` She asked Ba why he collected waste paper.

`-` Lùi thì: HTĐ `->` QKĐ

`-` Đổi ngôi: you `->` he

`5` .Lie told her brother he ought to clean his room 

`->` ought to `+` V-inf : phải làm gì

`->` lùi thì : your `->` his 

`6` .The teacher asked me where my father worked

`->` lùi thì : HTĐ `->` QKĐ

                   your `->` my

`7` .A tourist asked how far it was from HCM city to Vung Tau

`->` lùi thì : HTĐ `->` QKĐ

`8` .Tam's friend asked him how long he would stay in England 

`->` lùi thì : will `->` would

`9` .She asked Ba why he collected waste paper

`->` lùi thì: HTĐ `->` QKĐ

---------------------------------------------------------------

`->`  trần thuật câu hỏi

`-` S `+` asked/wondered/wanted to know `+` if/whether `+` S `+` V(lùi thì)

`-` S `+` asked/wondered/wanted to know `+` wh-q `+` S `+` V(lùi thì)