which引导的定语从句

在定语从句中，which和that在指代事物时，一般可以互换使用。在非限制性定语从句中则不能用that，要用which。which引导的定语从句可以修饰前面的整个主句。

例句说明

1、A shop should keep a stock of those goods which sell best.

商店应存有最畅销的货物。

2、This is the family which is planning to move to the city

这是要搬进城里的一家。

3、This is a reason which we must not forget.

这是我们不能忘记的一个原因。

4、When deep in thought, which he often was, he would forget all around him.

他常常陷入沉思，这时他就会忘掉周围的一切。

5、He bought a book, which was written by LuXun, and which he decided to give to his friend.

他买了本鲁迅写的书，他决定送给朋友。

6、There is a special parasite which gives rise to the itch.

有一种特别的寄生虫会导致皮炎。

7、He told a story which moved us deeply.

他讲了一个使我们深受感动的故事。

8、In the presence of so many people he was little tense, which was understandable.

在那么多人面前他有点紧张，这是可以理解的。

which可以引导定语从句，修饰表示事物的先行词，在定语从句中充当主语、宾语或者表语。例如： He was reading a book， which was about war. 他正在读一本关于战争的书。（关系代词which在修饰book的定语从句中充当主语。）

which引导的非定语从句：

which引导非限定性定语从句时有一个特殊用法，即它所引导的非限定性定语从句修饰主句中更多的部分甚至整个主句（这时被定语从句所修饰的“先行词”要作广义理解）， which仍在定语从句中作主语、宾语或表语。

例如：He set free the birds happily， which was a celebration for his success. 他开心地把鸟放了，这是对他成功的一种庆祝。