定语从句的概念及用法是什么
来源:才华咖 本文已影响3.16W人
来源:才华咖 本文已影响3.16W人
关系代词在定语从句中作主语时,从句谓语动词的人称和数要和先行词保持一致。下面是本站小编给大家整理的定语从句的概念及用法简介,希望能帮到大家!
定语从句的概念定语从句是由关系代词和关系副词引导的从句,其作用是作定语修饰主句的某个成分,定语从句分为限定性和非限定性从句两种。状语从句分为时间状语从句,结果状语从句,让步状语从句,原因状语从句,条件状语从句以及行为方式状语从句。名词从句包括主语从句,宾语从句,表语从句和同位语从句及there be句型。
定语从句用法在复合句中,修饰名词或代词的从句叫定语从句,被修饰的名词或代词叫先行词,引导定语从句的.有关系代词who,whom,whose,which,that等和关系副词where,when,why等,关系代词和关系副词在定语从句中担任句子成份。
1.由who引导的定语从句中,who用作主语,如:This is the boy who often helps me.
2.由whom引导的定语从句中,whom用作宾语,如:The man whom you are waiting for has gone home.
3.由whose引导的定语从句中,whose用作定语,如:Do you know the girl whose skirt is white?
4.由which引导的定语从句中,which用作主语或谓语动词的宾语或介词的宾语,如:
The room in which there is a machine is a work shop.
The river which is in front of my house is very clean.
This is the pen which you want.
注意:
(1)whom,which用作介词宾语时,介词可放在whom、which之前,也可放在从句原来的位置上;但在含有介词的动词固定词组中,介词只能放在原来的位置上。如:He is the very person whom we must take good care of.
(2)引导非限制性定语从句时,必须用关系代词which,不用that,如:I have lost
my bag,which I like very much.
(3)关系代词在句中作主语时,从句的谓语动词的人称和数必须和先行词保持一致。
5.由that引导的定语从句中,that可以指人或物,在从句中作主语或谓语动词的宾语,但不能放在介词后面作介词宾语,如:
The book that I bought yesterday was written by Lu Xun.?
注意在下面几种情况下必须用that引导定语从句。
(1)先行词是不定代词all,few,little,much,something,nothing,anything等,如:
All that we have to do is to practise English.
(2)先行词被序数词或形容词最高级所修饰,如
The first letter that I got from him will be kept.
(3)先行词被all,any,every,each,few,little,no,some等修饰,如
I've eaten up all the food that you gave me.
(4)先行词被the only,the very,the same,the last修饰时如
He is the only person that I want to talk with.
(5)先行词既有人又有物时,如:
They talked about persons and things that they met.
(6)当句中已有who时,为避免重复,如:Who is the man that is giving us the
class?
6.由when,where,why引导的定语从句,如:
I don't know the reason why he was late.
This is the place where we have lived for 5 years.
I'll never forget the day when I met Mr Li for the first time.
注意:先行词是表示地点时,如果从句的谓语动词是及物的,就用that(which),如果从句的谓语动词是不及物的,就用where引导。This is the house Which/that he has lived in for 15 years.(Where he has lived for 15 year.)
7.限制性定语从句和非限制性定语从句
(1)限制性定语从句是句中不可缺少的组成部分,主句和从句之间不用逗号分开。引导非限制性定语从句的关系代词有who,whom,whose,which,of which等,这些关系代词都不能省略。
(2)非限制性定语从句是对主句先行词的补充说明,没有这种从句,不影响主句意思的完整,一般用逗号把主句和从句分开,关系代词用which,不用that;指人时可用who,如:I have two brothers,who are both students.
8.如何简化定语从句
(1).定语从句简化为形容词或形容词短语作后置定语。如:
My grandfather lives in a village that is far away from here.
→My grandfather lives in a village far away from here.我祖父住在离这儿很远的一个村子。
This is a book that is worth reading.
→This is a book worth reading.这是一本值得看的书。
(2)定语从句简化为现在分词或现在分词短语作前置或后置定语。
The man who is standing under the tree is our English teacher.
→The man standing under the tree is our English teacher.
站在树下面的那个人是我们的英语老师。
I saw the house that was burning at that time.→I saw the burning house at that time.
当时我看到那房子在燃烧。
(3)定语从句简化为过去分词短语作后置定语。
I like to see the films which are directed by Zhang Yimou.→I like to see the films directed by Zhang Yimou.我喜欢看张艺谋导演的电影。
She is the girl who was praised at the school meeting.→She is the girl praised at the school meeting.她就是在校会上受表彰的那个女孩。
(4)定语从句简化为不定式作后置定语。
He is always the first person that comes to school.→He is always the first person to come to school.他总是第一个到校。
The report which will be given tomorrow is important to us.→The report to be given tomorrow is important to us.明天要作的报告对我们很重要。
(5)定语从句简化为what从句。
I couldn't remember the words that he said.→I couldn't remember what he said.
我记不得他说的话。
定语从句结构定语从句公式
定语从句=先行词+关系词+从句
先行词
指被定语从句修饰的名词、代词或句子。
一般先行词出现在定语从句的前面。
关系词
关系词常有3个作用:
①连接作用,连接主句和定语从句。
②指代先行词。
③在定语从句中担当成分。
注:关系代词有主语、宾语、定语之分。一般who做主语或其宾格形式的whom做宾语(whom作宾语时可省略),whose作为定语(whose不可省略)。关系代词在从句中作主语,宾语,定语等,关系副词在从句中作地点状语(where),时间状语(when),原因状语(why)。
定语
定语用来限定、修饰名词或代词,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、动名词表示的)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、从句作定语时则放在所修饰的词之后,作后置定语。
被定语从句修饰的名词、代词称为先行词。如“the girl”,“the book”
如:She is the girl who likes singing. 她就是那个喜欢唱歌的女孩。
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