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1. 定语的定义定语用来限定、修饰名词或代词的,是对名词或代词起修饰、限定作用的词、短语(动词不定式短语、动名词短语和分词短语)或句子,汉语中常用“……的”表示。主要由形容词担任,此外,名词,代词,数词,分词,副词,不定式以及介词短语也可以来担任,也可以由一个句子来担任。单词作定语时通常放在它所修饰的词之前,作前置定语。短语和从句作定语时则放在所修饰的词之后,作后置定语。
定语从句是指在一个句子中作定语的句子,定语从句要放在所修饰的词后。
如:1) The man who lives next to us is a policeman.
2) You must do everything that I do.
上面两句中的man和everything是定语从句所修饰的词,叫先行词,定语从句放在先行词的后面。
引导定语从句的词有关系代词that, which, who(宾格whom, 所有格whose)和关系副词where, when、why
关系词常有三个作用:1、引导定语从句;2、代替先行词;3、在定语从句中担当一个成分。
2. 定语从句中关系代词与关系副词的选择1. 明确关系代词,关系副词在定语从句中的不同作用
关系代词which , that , who在定语从句中作主语或在及物动词或介词后作宾语
关系副词when , where, why在定语从句中作状语,即定语从句中不缺主语、宾语,只缺时间、地点或原因状语
2. 分析句子结构,明确句法成分
关系词在从句中作宾语还是作状语,关键取决于从句中的谓语动词。如果定语从句中谓语动词是及物动词,应观察其后有无宾语。如果没宾语,则应考虑使用能充当宾语的关系代词which或that。如果句子中有宾语,就考虑关系副词when或where等。
3.定语从句的三种功能定语从句在句中相当于一个形容词,起定语的作用,修饰说明名词、代词或主语的全部内容。通常在被修饰的词语(即先行词)之后,由“关系词”引导。定语从句的三种功能:
1.连接功能:连接从句,引导一个定语从句
2.指代功能:指代先行词
3.语法功能:在定语从句中充当句子成分
4. 关系代词的用法(1) 如果先行词是all, much, anything, something, nothing, everything, little, none等不定代词,关系代词一般只用that,不用which。例如:
All the people that are present burst into tears.
(2) 如果先行词被形容词最高级以及first, last, any, only, few, mush, no, some, very等词修饰,关系代词常用that,不用which, who,或whom。例如:
This is the first composition that he has written in English.
(3) 非限制性定语从句中,不能用关系代词that,作宾语用的关系代词也不能省略。例如:
There are about seven million people taking part in the election, most of whom are well educated.
(4) which还有一种特殊用法,它可以引导从句修饰前面的整个主句,代替主句所表示的整体概念或部分概念。在这种从句中,which可以作主语,也可以作宾语或表语,多数情况下意思是与and this 相似,并可以指人。例如:
He succeeded in the competition, which made his parents very happy.
(5) 如果作先行词的集体名词着眼于集体的整体,关系代词用which;若是指集体中的各个成员,则用who。
(6) 先行词有两个,一个指人,一个指物,关系代词应该用that。例如:
The boy and the dog that are in the picture are very lovely.
(7) 如果先行词是anyone, anybody, everyone, everybody, someone, somebody,关系代词应该用 who 或whom,不用 which。例如:
Is there anyone here who will go with you?
"介词+关系代词"是一个普遍使用的结构
(1) "介词+关系代词"可以引导限制性定语从句,也可以引导非限制性定语从句。"介词+关系代词"结构中的介词可以是 in, on, about, from, for, with, to, at, of, without 等,关系代词只可用whom或 which,不可用 that 。
(2) from where为"介词+关系副词"结构,但也可以引导定语从句。例如:
We stood at the top of the hill, from where we can see the town.
(3) 像listen to, look at, depend on, pay attention to, take care of等固定短语动词,在定语从句中一般不宜将介词与动词分开。例如:
This is the boy whom she has taken care of.
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