Tom asked his father ,''when will you come back?''改为间接引语

问题描述:

Tom asked his father ,''when will you come back?''改为间接引语

Tom asked his father when would you come back.

Tom asked his father when he would go back.

Tom asked his father when to come back .

Tom asked his father ,when would he come back?
请做参考吧!

一楼的答案从句语序及标点均不对.二楼的答案中come应改为go.
Tom asked his father when he would go back.