2011英语四级语法讲义大全：定语从句一

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一、定语从句
2 b' F4 R( K6 g1．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 ~7 p% ?9 U4 ]1 U# T1 }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.
/ I& h$ ?, n, p" Y3 @" Z- I7 ]（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 .
- n3 ?6 F3 N! a1 C' j1 v③．Later my father and Mr.Crosset talked for about half an four of things and persons that they  remembered in school.
  c% W$ D; w( a/ A7 q6 S④．This is the very dictionary that I want to find .
. M% @, O0 l7 `（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 .