定语从句的种类及用法

定语从句的种类及用法
定语从句的种类及用法

定语从句的种类及用法
2种.限制性和非限制性定语从句
1、 定语从句在句中修饰某个名词或代词,被定语从句修饰的词叫先行词.定语从句需用下列关联词：
关系代词 关系副词
起连词作用,本身做从句的主语、宾语、表语或定语 起连词作用,本身在从句中作时间、地点或原因状语
who,whom,that,whose,which,as when,where,why
2、 掌握以上关系代词、关系副词的含义及使用时,要特别注意以下几点：
1） 指人时宜用who 的情况：
a.当先行词是 one,ones,anyone 或 those 时,关系代词用 who.
Anyone who goes there will be punished.
b.在there be 开头的句子中.
There’s a beautiful girl who came to see you this morning.
c.先行词后有一个较长的定语.
I met a foreigner in the city last week who could speak Chinese well.
d.在非限定性定语从句中.
She has a brother,who worked at that factory ten years ago.
2) 指物时宜用 that 的情况：
a.当先行词为 all,much,little,few,none,something,anything,everything,nothing 等不定代词时.All that can be done has been done.
b.当先行词既指人又指物时.
He spoke of the men and the thing (that) he had seen abroad.
c.当先行词被序数词或形容词的最高级修饰时.
This is one of the best films that I have ever seen.
d.当先行词被 the very,the only,the last,any,every 等修饰时.
This is one of the very book that I am looking for.
e.当先行词是疑问词 who,what,which 时.
Who that has such a home doesn’t love it?
f.关系代词在从句中作表语.
Mary is no longer the girl that she used to be.
3) 只能用 which 不能用 that 的情况.
a.引导非限定性定语从句修饰某物或整个句子.
Bruce went towards the fire,which was still smoking.
Tom came back late,which made his parents very angry.
b.关系代词作介词的宾语.This is the house in which Lu Xun once lived.
4) 关系代词 as 和which都能引导非限定性定语从句代表整个句子的内容,as
引导的从句可位于句首或句末,which引导的定语从句则不能位于句首.
Which you know,he is a good man.(×)
As you know,he is a good man.(√)
6)关系副词when,where,why其含义相当于on which,in which for which等,可以互换：
The day when /on which I met him first was May 1st.
I don’t know the reason why /for which he didn’t come.
7)whose指物时,可以与of which等结构互换,但应注意与冠词的位置关系：
This is the book the cover of which / of which the cover / whose cover is blue.
8)有时可用代替关系副词.在口语中常省略.
This is the reason (why / for which / that) he came late.
9)先行词是专有名词、整个句子或世界上独一无二的物质名词时,一般用非限定性定语从句修饰.The sun,which gives us light and heat,is very big.
10)在先行词和定语从句之间有无逗号有时会引起名义的变化：
He said nothing that made her angry.他没说使她生气的话.
He said nothing,which made her angry.他一言不发,这使她很生气.
3、 定语从句与强调结构
It is the place where they lived before.
It is in the place that they lived before.
第一个句子为定语从句,where指代the place,在定语从句中作状语,第二个句子为强调结构,强调in the place,that没有意义,把放回后面句子,句子意思完整.
Where is it that he found the lost watch?(强调句型,强调疑问副词where.)
Where is the watch he found yesterday?(定语从句,that指代the watch.)
4、 定语从句中的先行词
Is this book the one that you bought yesterday?
Is this the book that you bought yesterday?
第一个句子中,this book是主句的主语,the one是先行词.在第二个句子中this是主句的主语,the book是先行词.一定要避免出现：Is this book that you bought yesterday?
5、 定语从句与同位语从句
定语从句相当于形容词,它对先行词起修饰、描述或限制作用,而同位语从句则相当于名词,对其前面的词给予说明或作进一步解释,即说明该词所表示的具体内容.例如：
The news that we heard is not true.(定语从句)
The news that he won the prize is not true.（同位语从句）
另:在“have no idea ＋从句”结构中,其从句都作idea的同位语.例如：
I have no idea when she will be back.

从句按其在主句中的句法功能可分为三类，即名词性从句、形容词性从句(即定语从句)和副词性从句(即状语从句)。引导从句的词称作关联句。
名词性从句包括主语从句、表语从句、宾语从句和同位语从句。引导这些名词性从句的关联词包括:
从属连词that, if, whether;
连接代词who, whoever, whom, whomever, which, whichever, wh...

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从句按其在主句中的句法功能可分为三类，即名词性从句、形容词性从句(即定语从句)和副词性从句(即状语从句)。引导从句的词称作关联句。
名词性从句包括主语从句、表语从句、宾语从句和同位语从句。引导这些名词性从句的关联词包括:
从属连词that, if, whether;
连接代词who, whoever, whom, whomever, which, whichever, what, whatever, whose;
连接副词where, when, why, how。
其中, 从属连词只起连接作用, 在从句中不充当任何句法成分,而连接代词和连接副词既起连接作用, 在从句中又充当一定的成分.
That Owen should have married his cousin is not at all surprising.
The fact is that he didn't go to the dinner party.
I don't know if he will attend the meeting.
Have you heard the news that Mary is going to marry Tom?
你听说玛丽要和汤姆结婚的消息了吗?(that引导同位语从句)
[提示]
1. 在含有主语从句的复合句中, 为保持句子平衡, 常用it作形式主语,而将真正的主语从句置于句末.
It's well known that water is indispensable to life.
2. 为保持句子平衡, that引导的宾语从句也常用it代替, 而将真正的宾语从句置于主句句末。这常常出现在主句有形容词或分词作宾语补足语的情况下。
He made it quite clear that he preferred to live here.
3. 从属连词whether和if都作“是否…”解, 但if不可引导主语从句和表语从句。whether可与or(not)连用, 而if不可以。
I don't know whether (if) she is at home.
Whether she comes or not makes no difference.
4. that和what引导名词性从句的区别: that在从句中不充当成分,而what在从句中充当一定的成分, 如主语、表语、宾语等。that可省略, what则不可省。
He always means what he says.
She suggested (that) he do it at once.
5. 同位语从句大多由从属连词that引导, 常跟在下列名词后面,如fact, idea, opinion, news, hope, belief等, that不可省，一般用来解释说明这些名词的具体含义和内容。
We are familiar with the idea that all matter consists of atoms.
The news that we are invited to the conference is very encouraging.
如何判断各类从句呢？
答：
1．分析句子结构以区分从句的种类。遇到一个复合句，首先要分析其句子结构，看从句在整个句子中起什么作用，那么它就是什么从句。
2．分析引导词的句法作用以区别从句的种类。that这个词既可引导同位语从句，又可引导定语从句，这种两种从句从形式和结构上看特别相似，如何区分呢？区分 that引导的是同位语从句还是定语从句的方法是，看that在从句中是否充当句子成分，若that在从句中不充当任何成分，则为同位语从句；若that 在从句中充当主语或宾语，则为定语从句。
3． 根据被修饰词来判断从句的种类。定语从句常常修饰一些具有实际意义的名词，如：the film；the student；the book；a house等等。而同位语从句常常修饰一些表示抽象概念的名词，如fact、idea、promise、truth等，用来说明这些名词所表示的具体内容。状语从句在句子中常用来修饰谓语动词。
4．根据从句前词的词性来判断从句的种类。宾语从句分两种：动词的宾语从句、介词的宾语从句。宾语从句前肯定是动词或介词。定语从句是用来修饰名词或代词的，所以其前一定是一个名词或代词。
5．根据上下文意义和结构形式上区分从句的种类。如so that即可引导目的状语从句，又可引导结果状语从句，如何区分呢？主要从以下两点来区分。 ①根据上下文意义判断。“以便……”表示目的，是目的状语从句，“以致于……”，“结果……”表示结果，是结果状语从句。 ②从结构形式上来分辨。so that前有逗号，为结果状语从句，反之，则为目的状语从句。有时，so that前无逗号，这里要看从句中有无can、could、may、might、will、would、should 等情态动词，如果有，则多是目的状语从句，若没有，则多是结果状语从句。

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