2018年高中士兵考军校-英语知识点汇总（三十四）

　　定语从句中宜用which而不宜用that 的情况：

　　①当关系代词的前面有介词时。

　　1.A zoo is a park in which many kinds of animals are kept for exhibition.

　　2.Is this the room in which Mr. White lives？

　　②在非限制性定语从句中。

　　1.Crusoe's dog， which was are now very old， became ill and died 。

　　2.More and more people are beginning to learn English， which is becoming very popular in our country. （which指代主句）

　　③在一个句子中有两个定语从句，其中一个定语从句的关系代词用了that， 另一个宜用which 。

　　1. Let me show you the novel，that I borrowed from the library which was newly open to us.

　　2. At the station I bought some magazines that might help me to pass the time on the train and which I could pass on to others when I finished them.

　　④当关系代词后面带有插入语时。

　　1. Here's the English grammar which， as I have told you， will help improve your English.

　　⑤先行词本身是that， 宜用which 。

　　What's that which she is looking at？

　　⑥先行词是those+复数名词。

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