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同位语从句和定语从句的区别
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【区别】：
主语从句：简单地说就是一个句子是主语。引导主语从句的关联词有从属连词、疑问代词、疑问副词、缩合连接代词、缩合连接副词等。例句：What
I
say
is
right.我说的都是对的。如果是动词作主语的话要加上to或者-ing。
宾语从句：在句子中起宾语作用的从句叫做宾语从句.宾语从句分为三类:动词的宾语从句,介词的宾语从句和形容词的宾语从句。连接词一般都是that(指事务或人),which（指事）,who（指人）。
例句：The
teacher
told
the
children
that
the
sun
is
round.这里需要注意时态。因为太阳是圆的是不可争的事实，所以主句的动词用is。
还有就是注意虚拟语气。
定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，所以又称为形容词性从句。关系代词有that,
which,
who,
whom,
whose,
as等，绝对没有what；关系副词有where,
when,
why等。that引导的定于从句要跟同位语从句要区分。定于从句记住一定是要做成分的，而同位语从句不做成分。
eg:Is
he
the
man
who/that
wants
to
see
you?
他就是想见你的人吗？（who/that在从句中作主语）
状语从句可分为：时间状语从句；地点状语从句；原因状语从句；条件状语从句；目的状语从句；让步状语从句；比较状语从句；方式状语从句；结果状语从句。状语的位置比较灵活，可以位于句首、句末或句中。enough用作状语修饰形容词和副词时必须后置。由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。
eg:While
John
was
watching
TV,
his
wife
was
cooking.时间状语从句
表语从句：用作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大都一样。表语从句一定要用陈述语序。不可以用if，而用whether
连接表语从句(as
if
例外）。位于句首时要用whether。that在表语从句中不可以省掉。
eg:The
question
is
when
he
can
arrive
at
the
hotel.
同位语从句是名词性从句中的主要从句之一，它一般跟在某些名词后面，用以说明该名词表示的具体内容。可以跟同位语从句的名词通常有news，idea，fact，promise，question，doubt，thought，hope，message，suggestion，words（消息），possibility等。引导同位语从句的词通有连词
that，whether，连接副词
how,when,where等。（注：if,which
不能引导同位语从句。）
不懂请追问，(*^__^*)
嘻嘻~~
望采纳，祝开心~！！！
宾语从句同位语从句定语从句怎么区分
同位语从句前面是名词
宾语从句前面是动词
同位语从句
一、在复合句中用作同位语的从句叫同位语从句。它一般跟在某些名词后面，用以说明该名词表示的具体内容。如：
I heard thenews that our team had won．我听到了我们队获胜的消息。
I had no idea that you were here．我不知道你在这里。
二、可以跟同位语从句的名词通常有news，idea，fact，promise，question，doubt，thought，hope，message，suggestion，words（消息），possibility等。如：
I’ve come from Mr. Wang with a message that he won’t beable to see you this afternoon．
我从王先生那里来，他让我告诉你他今天下午不能来看你了。
三、英语中引导同位语从句的词通有连词 that，whether，连接副词 how, when, where等。（注：if, which 不能引导同位语从句。）如：
l have noidea when he will be back．我不知道他什么时候回来。
He mustanswer the question whether he agrees to it or not.
他必须回答他是否同意这样一个问题。
宾语从句
一定义 : 在复合句中起宾语作用的从句叫做宾语从句.
二种类 :
1 由that引导的宾语从句－－－当从句是陈述句时，用that引导宾语从句．在口语和非正式文体中， that可以省略
I know ( that ) you like English .
He told me ( that ) he would go there next week .
2 由whether / if 引导的宾语从句－－－当从句是一般疑问句，选择疑问句或反意疑问句时，用whether / if引导宾语从句,并且要把疑问的语序变为陈述的语序．一般情况下，whether / if可以替换
3 由特殊疑问词引导的宾语从句－－－当从句是特殊疑问句时，要用特殊疑问词引导宾语从句，并且要把疑问的语序变为陈述的语序．
He asked them why they hadn't finished their homework .
4 由形容词引导的宾语从句－－－当主句的谓语动词是由”be+形容词”构成的系表结构做谓语时，用形容词引导宾语从句
I am sorry ( that )I am late .
He is very glad ( that ) you'll help him .
谁能帮我解答一下定语从句英语
名词从句、定语从句
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.
名词从句考点分析
1．They want to know ______ do to help us. (NMET)
A. what they can B. how they can C. how can they D. what can they
析：此题要选陈述语序项，故应排除C、D。又因how they can do不完整，do后无宾
语，故也应排除，只有A项既是陈述语序，且what they can do完整正确地表达出“他
们能做些什么”这一意思，故答案为A。
2．His teacher ______ he ______ bright and ______ he was worth teaching.
A.didn’t think;was;that B.thought;was;whether
C.didn’t think;was;× D.thought;wasn´t;×
析：观察题目，可知think后跟有and连接的两个并列宾语从句，这时前一个宾语从句
的引导语that可以省略，但引导后一宾语从句的that不可省略，据此，可排除C、D
两个选项。若选B项，全句意思不通，而选择A项可表达“他的老师认为他不聪明，不
值得教”这一意思，且语法结构无误，故可定A是正确答案。
3．______ is done cannot be undone.
A.How B.That C.What D.Where
析：do一般作及物动词使用，从题干看，需选一词作主语（逻辑上是done的宾语）。
而A.How,D.Where均是副词，不能作主语，故应排除。B项that一词只能在定语从句
中作主语，不能在主语从句中作主语，也应排除。只有选what(＝the thing that),才
能正确表述“凡是做的不可不做”这一意思。
4．Take care ______ you don´t make mistakes in the coming exam.
A.of that B.about that C.for what D.that
析：take care是“注意”、“当心”意，后面可跟that引导的宾语从句来表达“当心
不要…”意思，据此，该题应选D。
5．To his surprise,the umbrella was not ______ he had put.
A.which B.where C.the place D.that
析：观察题干，was not后是表语，根据where在表语从句中相当于in/at the place where,
将其置于空白处则可表达“伞不在他当初放的地方”这一意思，而C选项缺少词，不可
选。A、D项皆不合用。
6．______ we can´t get seems better than ______ we have.
A.what;what B.what;that C.that;that D.that;what
析：此题显然是要表达“我们得不到的东西似乎比我们得到的东西好。”这一意思，即
“A seems better that B”结构，根据what＝the thing(s) that这一特点，将其置
于两空白处正好可以表达出前者比后者好这一意思，故答案为A。
7．______ we’ll go camping tomorrow depends on the weather.
A.If B.Whether C.That D.Where
析：此题depends前的主语从句是一个不肯定的内容，在句首表“是否”意时，只能用
Whether,不可用If。故答案为B。
8．______ they are most interested in is ______ they can produce more and better
cars.
A.That;how B.What;how C.What;what D.That;that
析：is前面是一个主语从句，要表达“他们最感兴趣的（东西）”这一意思，只能选what
填入空白;is是表语从句，显然只有选how才能表达“如何生产更多更好的汽车”，故
答案为B。
9．He made a suggestion that the English test ______ until next Wednesday.
A.will be put off B.be put off C.will put off D.put off
析：suggestion,order,adivce等词后的同位语从句谓语要用（should）do的形式，且
该句中test与put off为被动关系，故选B。
10．I don´t think ______ he said something like that is right.
A.that B.what C.whether D.when
析：此句think后是一宾语从句，这个宾语从句的主语在is之前，它是一个被动句。
因为he said something like that已经含有主、谓、宾、状等成分，只有选不表意义，
不做成分的that才合适，故选A。
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引导和不用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.
定语从句考点分析
1． The best work ______ Luxun wrote and ______ I have read has been made into a film.
A.which;that B.that;× C.×;that D.×;×
析：如果两个定语从句并列，关系代词作宾语时前一句的可以省略，但后一句的不可省略，故应选C。
2． It was in 1969 ______ two Americans got to the moon by space ship.
It was 1969 ______ two Amerians got to the moon by space ship.
A.when B.which C.that D.×
析：第一句是强调时间in 1969,强调结构是“It was＋强调部分＋that句”，故应选C。第二句It是表时间的，先行词1969在从句中作状语，故选A。
3． Is this the house ______ Shakespeare was born?
A.at which B.which C.in which D.at where
析：观察题目，空白处只有填in which或where才能表达“这是莎士比亚出生的房子吗？”这一意思，故答案为C。
4． Is this house ______ Shakespeare was born?
A.where B.which C.in which D.at which
析：将此句变为陈述句；This house is ______ Shakespeare was born.显然is后是一表语从句，只有选where(＝the place where)才能表达“这是莎士比亚的出生地”这一意思，故答案为A。
5． In the dark street,there wasn’t a single person ______ she could turn for
help.
A.to whom B.of whom C.from whom D.that
析：“介词＋关系代词”要考虑短语搭配或与先行搭配，这道题短语turn to有关，故
应选A。
6． The two things ______ they felt very proud were Jim´s gold watch and Della´s
hair.
A．about which B.of which C.in which D.for which
析：涉及be/feel proud of短语，故答案为B。
7． Have you ever asked him the reason ______ may explain his being late.
A.why B.that C.for which D.what
析：此题易误选A、C，因为先行词是the reason,但细观察分析，定语从句缺少主语，所以答案是B。注意what不能引导定语从句。
8． Farming is difficult ______ there is no rain.
A.where B.in place C.that D.the place where
析：因为difficult是形容词，故其后不是定语从句。这儿的空白处应填引导状语从句where(＝in the place where),全句表达“在没有雨水的地方耕种困难”。这一意思，可见答案为A。
9． We need the same machine ______ in your factory.
A.which is being used B.as is being used
C.that is being used D.as it is being used
析：根据“the same＋先行词”后跟as引导定语从句的原则，可知答案为B。
10．______ the people,not things ______ are most important.
A.There are;who B.Those are;that C.It is;that D.It was;who
析：仔细观察分析题目，可知只有C构成强调句才有成立。当我们要检验视其为强调
句的判断是否正确时，只要将“It is (或was)…that”这三个词去掉，剩下部分读
起来正确无误，则证明判断是正确的，反之是错误的。此题如不填“It is…that”
三词，句子是The people,not things are most important.语义完整正确，说明选
C是对的。
定语从句和同位语从句的区别举例
定语从句与同位语从句的区别
1．定语从句是形容词性的,其功能是修饰先行词,起限定作用.
而同位语从句等同于它所修饰的名词,是名词性的,其功能是对所修饰的名词作补充说明.同位语从句一般跟在名词fact,hope,idea,news,doubt,suggestion,information,opinion,decision,discovery,truth,promise,statement,problem,rule等的面.
They were all very much worried over the fact that you were sick.对你生病这件事,他们都很焦虑.（同位语从句）
Where did you get the idea that I could not come 你在哪儿听说我不能来?（同位语从句）
I have no idea whether he'll come or not.我不知道他是否来.（同位语从句）
It is a fact (that) you can't deny.这是一个你不能否认的事实.（定语从句）
It is a fact that she has done her best.她尽了最大的努力,这是事实.（同位语从句）
2．在定语从句中,that代先行词,在从句中不仅起连接作用,还充当某个句子成分,在作宾语时通常可省略.
而在同位语从句中,that只起连接主句和从句的作用,无意义,在从句中不充当句子成分,一般不可省.
The news (that) we heard spread all over the school campus.
我们听到的消息传遍了校园.（定语从句）
The news that Mr.Li will be our new English teacher is true.
李先生将是我们的新英语老师这个消息是真的.（同位从句）
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