定语从句
A、The Attributive Clause
(介词 preposition、关系代词 relative pronoun、关系副词 relative
adverb)
定语从句: 在复合句中修饰某一名词或代词的从句叫定语从句。被
定语从句修饰的词叫作先行词，定语从句放在先行词的
后面，定语从句可以由关系代词 that、which、who(宾
格whom、所有格 whose)和关系副词 where、when、why
引导；关系代词在定语从句中作主语或宾语，关系副词
在定语从句中作状语，它们在复合句中起连接主从句的
作用。
一、 关系词的选用
1、当先行词是人时，用关系代词 who、whom、that 引导定语从
句，如：
The foreigner who/that visited our school yesterday is
from Canada.(作从句主语，不能省略)
The person (who/whom/that) you just talked to is Mr.
Green. (作从句宾语，可以省略)
2、当先行词是物时，用关系代词 which、that 引导定语从句，
如：
They planted the trees which/that didn’t need much
water. (作从句主语，不能省略)
The fish (which/that) we bought were not fresh. (作从
句宾语，可以省略)
3、当从句主语与先行词（可以是人也可以是物）存在从属关系
时，用关系代词 whose
I know the boy whose article is very good.
I live in a house whose windows face the south.
