什么类型的名词可以用which

"Which" 通常用于引导定语从句，它可以用在以下类型的名词之前：

1. 可数名词单数：用于指代前面提到的特定可数名词单数形式。

e.g., The book which you gave me is fascinating.

2. 可数名词复数：用于指代前面提到的特定可数名词复数形式。

e.g., The cars which are parked outside are expensive.

3. 不可数名词：用于指代前面提到的特定不可数名词。

e.g., The water which flows in rivers is pure.

4. 集合名词：用于指代前面提到的特定集合名词。

e.g., The members which make up the committee are all experts.

5. 专有名词：虽然通常不用which引导，但在某些情况下也可以。

e.g., The United Nations, which was founded in 1945, is an international organization.

当"which"引导的定语从句中包含有介词时，"which"的位置会有所不同，通常会放在介词之后：

e.g., The book (that/which) I read last night was interesting. (这里which可以替换成that)

e.g., The book (that/which) I read with my friend was interesting. (这里which会变成with which)

"which"也可以用于某些非限定性定语从句中，这时它通常位于逗号之后：

e.g., She has many friends, which makes her popular.