2011英语四级语法讲义大全：定语从句一

一、定语从句

1．定语从句三步：第一找出先行词；第二看先行词在定语从句中的语法功能（做主语、宾语或状语）；第三选择合适的关联词。

2．定语从句在选择关连词that 与which时，常常容易出错，所以应记住什么时候只能用that，什么时候只能用which.

（1）．只能用 that 的情况归纳4种：即先得词被序数词最高级修饰过；先行词为all 、everything、nothing等不定代词；先行词同时是人和物并列时；最后先行词分别被the only 、the very the same、the last 修饰。请看下列四组例句，注意其先行词：

①．The first thing that we should do is to work out a plan .

②．I t almost seemed as if the good man were trying to teach us all that he knew at this lesson .

③．Later my father and Mr.Crosset talked for about half an four of things and persons that they  remembered in school.

④．This is the very dictionary that I want to find .

（2）．只用which is 情况有两种情况：一是非限制性定语从句，关连词要用which；二是做介词宾语时只能用which。请看下列两组例句：

I said nothing , which made him more angry .

I have the book about which you are talking .