间接引语Why do you know Tom did't go to school?中语法和语意上哪里有问题?

问题描述:

间接引语Why do you know Tom did't go to school?中语法和语意上哪里有问题?

why do you know that Tom didn't go to school?
貌似不是间接引语吧,就是一个特殊疑问句.