定语从句
定语从句(Attributive
Clauses)在句中做定语,修饰一个名词或代词,有时也可以修饰部分或整个句子。
被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后,由关系词(关系代词或关系副词)引出。
关系代词有:who,
whom, whose, that, which, as。
关系副词有:when,
where, why, how。
关系代词和关系副词放在先行词和定语从句之间,起连接作用,同时又可做定语从句的一个成分。当关系代词做宾语时可以省略。
定语从句中的谓语动词必须在人称上和数量上和先行词保持一致。
定语从句分为限制性定语从句和非限制性定语从句。
1 、关系代词引导的定语从句
1) who, whom, that 这些词代替的先行词是人的名词或代词,在从句中所起作用如下:
Is he the man who/that wants to see you?(who/that在从句中作主语)
He is the man whom/ that I saw yesterday.(whom/that在从句中作宾语)
2) whose 用来指人或物,(只用作定语,若指物,它还可以同of which互换),例如:
Please pass me the book whose (of which)
cover is green.
3) which, that 它们所代替的先行词是事物的名词或代词,在从句中可作主语、宾语等,例如:
A prosperity which / that had never been
seen before appears in the countryside.(which / that在句中作宾语)
The package (which / that) you are carrying
is about to come unwrapped. (which / that在句中作宾语)
关系代词that和which 都可以指物,that 和Who 都可以指人,其用法区别:
不用that的情况:
a) 在引导非限定性定语从句时
(错)The tree, that is four hundred years old, is very famous here.
b) 介词后不能用
We depend on the land from which we get our
food.
c) 多用who 的情况
①关系代词在从句中做主语
A friend who helps you in time of need is a
real friend.
②先行词为those,
people 时
Those who were either fools or unfit for
their offices could not see the cloth.
③先行词为all,
anyone, ones, one 指人时
One who doesn't work hard will never
succeed in his work.
④在There be句型中
There is a stranger who wants to see you.
⑤在被分隔的定语从句中
A new teacher will come tomorrow who will
teach you German.
⑥在有两个定语从句的句子中,其一用who,其二用that,但若先行词后接两个以上的并列定语从句时,后一个必须重复前一个关系代词。
The student who was praised at the meeting
is the monitor that is very modest and studies very hard.
There is a teacher
who is always ready to help others and who enjoys what he do
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