开头用宾语从句?听起来很奇怪啊.如果要用从句开头,那就是主语从句.除非是很不正规的口语中的用法.
(What he dislikes) is (that he know nothing about it.) 前一个括号是主语从句,后一个括号是表语从句.
I want to know (when we can have lunch.) 宾语从句