1.凡是直接引语改为间接引语——即变成宾语从句后一律要用陈述语序.
2.推而广之,名词性从句即宾语从句,表语从句,主语从句等一律用陈述语序.
3.对主语提问时指对句子的主语提问,而你句的例子还原后都是对宾语提问.you did What,are you doing What
4.如 Jack is my friend.
Who is your friend?
I know Who is your friend.
看下面的变化：
Jack is my friend.
Who is Jack
I know who Jack is
.