Do you know ?
A. what he happened
B. what the matter is with him.
C. what happened to him
D. what did he happened
网友回答
A. what he happened
B. what the matter is with him.
(答案→)C. what happened to him
D. what did he happened
解析：英语宾语从句中一般为陈述语序。句意：你知道他发生了什么事吗？happen只能用于sthhappened to sb句型，故选项AD结构错误。特殊疑问句What is the matter with him?本身即为主系表结构，what是句子主语，故变为宾语从句时，语序不变，选C。