4/ "Does your brother live in London, Peter?" Jane asked

--> Jane asked Peter if his brother lived in London.

5/ "What are you doing now?" Jim asked his sister

--> Jim asked his sister what she was doing then.

6/ "Did you enjoy the party last night?" My classmate asked me

--> My classmate asked me if I had enjoyed the party the previous night.

4. Jane asked Peter if his brother lived in London.

Câu tường thuật dạng yes/no question `->` if + S + V(lùi thì)

Hoặc whether S + V(lùi thì) or not.

5. Jim asked his sister what she was doing then.

Câu tường thuật có từ để hỏi (what, when, how,...)

wh- question + S + V(lùi thì)

now `->` then 

6. My classmate asked me if I had enjoyed the party the night before.

Câu tường thuật dạng yes/no question `->` if + S + V(lùi thì)

Hoặc whether S + V(lùi thì) or not.

last night `->` the night before