英语语法：I have no idea what you are talking about.请问what从句是作句子成

英语语法：I have no idea what you are talking about.请问what从句是作句子成 I had no idea what you are talking about.这句话what前面为什么不加介词,比如 请问是What are you talking about还是What is you talking about? I have no idea what do you You have no idea what I feel I really have no idea what I shall talk about. what are you talking about 请问What were you talking about?和What are you talking about?有何 what are you doing tomorrow?i have no ().what about you?i 'm I have no idea what this word means.是宾语从句吗? I have no idea what has happened to him为什么是同位语从句 what are you doing tomorrow?i have no ().what about you?