i am sad（ because my mother is illl)(括号部分提问) ying tian asked his teacher how he could play th

题目

i am sad（ because my mother is illl)(括号部分提问) ying tian asked his teacher how he could play th
ying tian asked his teacher how he could play the violin well(改为直接引语）
i should (do my homework)括号部分提问)
i don't know what to do(改为含有宾语从句的复合句

答案

Why are you sad?
Ying Tian asked his teacher,"How can I play the violin well?"
What should you do?
I don't know what he wanted me to do.