which能引导名词性从句吗？和what有什么区别？

Question

which做成分吗？我是说在名词性从句里..

Answer 1

1L的例子貌似不是宾语从句。which 可以引导名词性从句，它与waht一样要在从句中充当成分。但是要根据具体意思来使用。what 与which 的一般区别为 当指代没有范围的事物时用what,指代有范围的事物时用which。
例如：I don't know what you want to choose
I don't know which one you want to choose from the three jobs

—“Why did you go to the wrong class, Mr. Wang”
—“Well, I forget _______ I was supposed to go to.”
A. which the room B. which room C. what was the room D. what room was it
此题选B

Answer 2

名词性从句包括主语从句、表语从句、宾语从句、介词宾语从句、同位语从句、宾语补语从句、形容词补语从句
which在宾语从句中较常见，例如：This is my house in which there are many beds . 这个时候which 一般是要和介词连用的，做状语。