怎样区分定语从句和名词性从句, 专业人士回答! ! !

定语从句和名词性从句如何区分？~

最关键的一点：名词性从句包括主语从句、宾语从句、表语从句和同位语从句，这些从句分别在整个句子中作主语、宾语、表语和同位语。而定语从句在整个句子中作定语，起修饰作用。

具体用法如下：

名词从句
名词从句有四类：宾语从句、主语从句、表语从句、同位语从句。例如：
宾语从句：I don’t know where he will go.
主语从句：Where he will go is unknown.
表语从句：The problem is how we can get so much money.
同位语从句：We all feel sorry about the news that he failed in the game.
下面几点是学习名词从句要加以注意的：
1． whether和if都可以引导宾语从句表达“是否”意，（即引导宾语从句时if和whether
可以互换）但以下几种名词从句要用whether（不用if）引导：
（1） 引导主语从句，且在句首时。例：Whether he has won the tennis is not known.(但 It is not known whether/if he has won the tennis).
（2） 引导表语从句时。例The problem is whether he can get a job.
（3） 引导同位语从句时。例：I have no idea whether he will come.
（4） 介词后的whether从句。例：I worry about whether I hurt her feelings.
2． 位于句首引导主语从句的that不可忘。
例如：That he got the first place in the competition surprised all of us.
3． 在“It is suggested/proposed/ordered/a pity/no wonder/necessary/strange/…＋
that从句”结构中，that从句谓语有时用（should）do这样的虚拟语气形式。
例如：It is suggested that we(should) improve the relations between us.
It is a pity that one(should) stay in one place all one′s life.
It is strange that she should have failed to see her own shortcomings（缺点）.
4． 在“The reason why…is that…”句式中that不要误为because.
例如：The reason why he didn′t go to school yesterday is that he was ill.
5． 名词从句中that,what用法比较：
引导名词从句的that是连词，在句中无成份，无意义，而what是连接代词，what＝the thing(s) that.
例如：It was told in yesterday′s newspaper that what the students had done was praised by the factory.
I know that he will study.
I know what he will study.
That he works hard at his lessons is known to us all.
What he works hard at is known to us all.
All I ask is that you should tell the truth./He is not what(＝the person that)he
used to be.他和以前大不相同了。
6． where在名词从句中的使用特点：
where在名词从句中有时可以变为“the place where”,有时可以变为“介词＋the place where” 形式。例如：
主从：Where(＝The place where)she has gone is still unknown.
宾从：Would you please tell me where(＝the place where) Mr Smith lives?
表从：Your dictionary remains where(＝in/at the place where)you put.
同位从：Have you any idea where(＝of the place where) she is spending her holidays?
7． 无论是哪种名词从句都是陈述语序。例如：
I know where he lives./Please tell me what her name is.
当一个特殊疑问句本身就是陈述语序（即“主＋谓＋（宾）”或“主＋系＋表”结构），将其变为间接引语（即宾语从句）时，无需改变语序。例如：
What′s the matter with him? She asked me what was the matter with him.
Who looks after your grandfather? He asked me who looked after my grandfather. ===========================================================================
定语从句

一、 定语从句与引导词
定语从句是在复合句中修饰某一名词或代词的从句。被修饰的名词或代词叫做选行词，
而引导定语从句的词叫引导词，有关系代词和关系副词两类。
懂得什么样的先行词后用什么样的引导词是学好定语从句的关键。
1． 关系代词有：that,which,who,whom,whose,在定语从句中作主语、宾语中表语，whose 作定语。代人的有：who,whom,whose,that；代物的有：that,which,whose.例如：
The man who helped you is Mr White.(who代人，在定语从句中作主语)
That is the person(whom/who/that) you want to see.(whom,who,that代人，在定语从句中作宾语，可省略)
I′m not the fool(that) you thought me to be.(that代人，在定从中作表语)
A dictionary is a useful book which(＝that) tells us the meaning of words(which或that代物，在定从中作主语)
2． 关系副词有：when(指时间)，where(指地点),why(指原因)，在定语从句中作状语。
例如：Would you suggest a time(when) we can have a talk?(when可省略)
The house where they live is not very large./This is the reason why he did not came to the meeting.
注意：不是表时间的先行词都用when引导定从，不是表地点的先行词都用where引导定从。例如：We′ll visit the factory which(＝that) makes radios.
(which或that在定从中作主语，where不可用主语，故不可用)
They still remember the happy days(which/that) they spent in Beidaihe.
(which或that在定从中作spent的宾语，when不可作宾语，故不可用)

二、限制性定语从句与非限制性定语从句
限制性定语从句和主句之间不用逗号分开，修饰主句中的某一个名词或名词词组或代
词；非限制性定语从句常用逗号和主句隔开，可以修饰主句中的某一个词，也可修饰整个句子。非限制性定语从句不能用that引导，引导非限制性定语从句的关系词不能省略。非限制性定语从句例：Li Ping′s father, who works in a factory, is an engineer./He tore up my photo, which made me very angry.(which指代主句内容，因前后两句是因果关系，此时which不可换为as。)
He is good at physics, as is known to us all.＝As is known to us all, he is good at physics.(as指代主句内容，在as is known/believed, as we all know/believe这类结构中as不可换为which)

三、 只用that引导和不用that引导的场合
1． 只用that引导的场合
1） 当先行词既包括人又包括物时：He talked about the men and the books that attracted him.
2） 指物的先行词被any, every, only, very, all, no等修饰时：These are the very points that interest me./That′s the only watch that I like most.
3） 指物的先行词被序数词或形容词最高级修饰时：The first step that we are to take is very difficult./This is the second card that he gave me.
4） 先行词是指物的不定代词all,little,few,much,及everything,anything,nothing等时：There is still much that can be done about it./Have you got everything that you need?
5） 先行词是who时：Who that have seen him does not like him?
2． 不用that的场合如下：
1）非限制性定语从句中 Last night ,I saw a very good film,which was about the Long
March .
2）介词放在关系代词之前时 This is the man from whom I learnt the news
3）句中出现了that，或先行词是that时 I have found that which I was looking for.

四、“介词＋关系代词”用法
1． 介词的确定应依据定语从句中短语的习惯性搭配，例如：Who is the girl with whom you just shook hands?(shake hands with…是习惯性搭配)
2． 介词常受先行词的制约（即介词和先行词的搭配），例如：He built a telescope through which he could study the skies.(through which 即through the telescope)
3． 当关系代词作“动词＋介词”固定短语的宾语时，此时因定短语中的介词不能拆开移到关系代词前。例如：This is the watch which you′re looking for./He is a kind of man whom you can safely depend on.

五、几个名词后的引导词
1. situation后常用where,in which引导定语从句：Can you imagine a situation where/in
which you can use the word?
2. way(方式，方法)后常用in which或that或how引导定语从句，也可省略：Do you know the way(in which/that/how) he worked out the problem?
3. “the same＋名词”，“such＋名词”，“as＋名词”后通常用as引导定语从句。
例如：I have the same dictionary as you(have)./Such a book as you bought is not worth buying.

名词性从句包含：主语从句,宾语从句,表语从句,同位语从句.从句中的that只起引导作用,没有意义,也不做任何成分.宾语从句中常省略.whether、if引导名词性从句起引导作用,还有意义“是否”的意思,但不充当成分；不能引导定语从句.疑问词引导名词性从句,疑问代词what,which,who做主语,宾语,表语；疑问副词where,when,why,how在从句中做状语.前面不一定有名词；what不能引导定语从句.
定语从句属于形容词性从句,作用相当于形容词.其中出现的名词叫做先行词,that,which,who,whom,whose叫做关系代词,指代先行词,在从句中要充当成分,这就是区分它和名词性从句的关键.where,when,why叫做关系副词,在从句中做状语.
例如：You should hand in all that you have.（定语从句）
You should hand in what you have.（宾语从句）
It is an honor that she was chosen as the monitor.（主语从句）
We heard it that she would get married.（宾语从句）
The king’s decision that the prisoner would be set free surprised all the people.（同位语从句）
The king’s decision is that the prisoner would be set free.（表语从句）

首先了解一下你提出的这两个从句的含义及作用：
定语从句：充当定语，起修饰的作用，为了把句子表达得更加清晰明确，去掉它句子仍然完整。如：
This is the sentence (which i want to give to you as an example).这个就是我想要给你当做例子的句子。
如果去掉括号内的内容（即定语从句部分），句子仍然是完整的，只是去掉之后，主句的意思不是特别清晰了。
而名词性从句，在主句中充当名词的作用，能充当主语、宾语、表语、同位语、介词宾语等，相当于是一个实词，去掉它的话，主句就不完整了。因此根据它在句子中不同的语法功能，名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句；
因此，你提出的问题应该也可以理解为：定语从句和宾语从句的不同，或者它与同位语从句、主语从句、表语从句或同位语从句的不同。
举两个例子：定语从句和宾语从句
He lives in the house （which is red）. （定语从句）
Can you tell me（ which house he lives in?）（宾语从句）
试着去掉从句部分，是不是句子就不完整了？
仅供参考！

只要看看结构就清楚了：定从必定放在一个名词之后，因为它是修饰该名词的；名称性从句前面没有名称，在句中做主、表、宾或同位语。

---

余庆县15968577781： 名词性从句与定语从句的区别 - ？
检云天麻： 最大的区别就是,名词性从句本身就是名词性的,而定语从句是修饰性的,定语从句如果从句中去掉的话,剩下的部分依然是一个结构完整的句子.

余庆县15968577781： 定语从句与名词性从句的区别 - ？
检云天麻：[答案] 首先你要分清句子的基本成分:主谓宾状语是修饰谓语的,定语修饰主语或宾语当一个词修饰不了主、宾的时候,我们就用一个句子来修饰它们呢,这个就是定语从句.也就是整个句子都作定语.而名词性从句,是整个句子充当了主语...

余庆县15968577781： 如何区别名词性从句和定语从句? - ？
检云天麻：[答案] 名词性从句包含:主语从句,宾语从句,表语从句,同位语从句.从句中的that只起引导作用,没有意义,也不做任何成分.宾语从句中常省略.whether、if引导名词性从句起引导作用,还有意义“是否”的意思,但不充当成分;不能引导定语从句.疑问...

余庆县15968577781： 怎样区分名词性从句和定语从句?详解 - ？
检云天麻： 名词性从句就是句子有了名词的性质,可以当名词用;定语从句就句子可以当形容词用,当定语.引导名词性从句的有that whether 和 疑问词,其中that whether 不做主要成分.定语从句的引导词有 关系代词that which who whom whose 关系副词有 when how why where 等 还有一些复合的 what 等 .需要注意的是,定语从句的关系代词一定要是所引导句子里的主语 表语 宾语 ,而关系副词只当从句里的状语.

余庆县15968577781： 定语从句和名词性从句怎样区分 - ？
检云天麻： 名词性从句包含:主语从句,宾语从句,表语从句,同位语从句.从句中的that只起引导作用,没有意义,也不做任何成分.宾语从句中常省略.whether、if引导名词性从句起引导作用,还有意义“是否”的意思,但不充当成分;不能引导定语从句....

余庆县15968577781： 定语从句与名词性从句的区别? - ？
检云天麻： 定语从句有定语的功能,在句子里修饰名词的句子即为定语从句;名词性从句分为主语从句(在句中作主语),宾语从句(在句中作宾语),表语从句(跟在系动词后作表语),同位语从句(在句中作同位语)

余庆县15968577781： 怎么区分名词性从句和定语从句 - ？
检云天麻： 名词性从句包括:主语从句,宾语从句,还有同谓语从句主要看从句在句子中充当什么成分,如果从句在主语(或宾语)的位置上那么就是名词性的如果修饰先行词的,就是定语从句

余庆县15968577781： 英语语法 名词性从句和定语从句的区别 - ？
检云天麻： 原发布者:幽暗杰少定语从句与名词性从句的区别定义区分•1.定语从句:修饰某一名词或者代词的从句叫定语从句.定语从句一般紧跟在它所修饰的先行词之后.•2.定语从句:名词性从句就是在句中可以充当名词的成分的部分是一个句子....

余庆县15968577781： 英语名词性从句和定语从句的区别 - ？
检云天麻： 两句话就可以解决所有问题,概念清晰后才可以做进一部的细分.1、名词从句:句子中某一部了少了一个名词性的成份,用了一个句子来代替它,这就是名词从句2、定语从句:从句做了定语修饰先行词,名词或代词.因为英语中没有这样的单...

余庆县15968577781： 浅析如何区分定语从句和名词性从句 - ？
检云天麻： 定语从句和名词性从句从来都是高中英语学习中的重点和难点,很多学生也在这两个从句上束手无策.特别是在湖北省高考改革之后,完成句子的出现更加突显了掌握好这两大从句的重要性.在我看来,要想把握好从句,一定要从句子结构分析...