He's___ as a "bellyacher"—he's always complaining about something.
A. who is known B. whom is known
C. what is known D. which is known.
请问这道题为什么不能选择A,答案解析是“is 后的连接词既连接引导表从,又要在从句中作主语,只有what”。who不是也可以引导表从吗?
这个表语从句为名词性关系分句,what=that which. who不能引导名词性关系分句,只能引导名词性疑问分句。所以用who是错误的。
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