英语主语从句和同位语(精讲精练)
英语句子成分主语谓语宾语表语定语状语补语同位语讲解[整理版]
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英语句子成分主语谓语宾语表语定语状语补语同位语讲解[整理版]主语从句即一个句子作主语如:what he said is true. what he said是一个句子具备最短的句子所应有的主语(he)和谓语动词(said)。
又应有what引导词所以做从句，又Is 是大句子中的谓语动词，在主句中，所以其前的成分为主语，主语是一个句子，叫做主语从句。
宾语从句和主语从句同理，事不过宾语从句是在谓语动词后的句子，谓语后的成分是宾语。
如: He said that the girl is beautiful. that the girl is beautiful为宾语从句，做动词said后的宾语。
表语从句依然如此，只是动词为系动词或感官动词，动词后为表语从句。
如:He is who I am looking for. who I am looking for. 为表语从句，做系动词is的表语。
前几种句子均为名词性从句，引导词指人用who whose whom,指物用which，what。
其中which有范围 what没范围。
连接副词有:when where why how四种。
如:I don't know where he is going.(宾从)定语从句为形容词性从句，即一个句子像一个形容词，修饰一个名词或代词，而被修饰的词在句子前面，叫做先行词。
如:The girl who wears a red coat is my classmate. 其中who wears a red coat 是定语从句，修饰the girl, 所以the girl为先行词，主句为The girl is my classmate。
定语从句引导词指人和名词性从句相同，who whose whom;指物只用which，没有what;that 即指人又指物。
关系副词没有how 即 when,where,why.如: The year when I arrived there is 2000. (when I arrived there为从句)状语从句考点比较简单，记住他引导词的意思就行了，如时间是when while 等，地点是where wherever,原因是why 结果because等就可以了英语主谓宾表定状补成分精简讲解一(主语:主语(subject) 是一个句子的主题( theme)，是句子所述说的主体。
高中 同位语从句详细讲解与练习(附答案)
同位语从句讲义1．定义：用作同位语的从句叫做同位语从句。
2.用法：同位语从句的先行词多为fact, news, idea, thought, question, reply, report, remark等，关联词多用从属连词。
如：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。
Where did you get the idea that I could not come?你在哪儿听说我不能来？Early in the day came the news that Germany had declared war on Russia.德国已对俄国宣战的消息一大早就传来了。
注：同位语从句偶尔由从属连词whether引导。
如：I have no idea whether he’ll come or not.我不知道他是否来。
连接代词who, which, what和连接副词where,when, why, how亦可引导同位语从句。
The question who should do the work requires consideration.谁该干这项工作，这个问题需要考虑。
W e haven’t yet settled the question where we are going to spend our summer vacation.到哪儿去度暑假，这个问题我们还没有决定。
It is a question how he did it.那是一个他如何做了此事的问题。
1．that引导的同位语从句与定语从句之区别?that引导的同位语从句that引导的定语从句句法功能上that只起连接从句的作用，无意义。
在从句中不充当句子成分。
不可省。
that替代先行词在从句中不仅起连接作用，还充当一个句子成分。
主语从句与同位语从句详解
【主语从句】主语从句是指在句子中做主语的从句。
引导主语从句的词有连词that，whether；连接代词who，what，which以及其强调形式whoever，whatever，whichever；连接副词when，where，how，why等。
例如：That she was able to come made us very happy．Whether she will come or not is still a question．What we need is more time．Where she has gone is a mystery．在主语从句中，为了保持句子的平衡，我们常常把主语从句后置，而以形式主语it代替。
例如：That he misunderstood me is obvious．通常说成：It is obvious that he misunderstood me．When the plane is to take off has not been announced．通常说成：It has not been announced when the plane is to take off．引导主语从句位于句首的连词不能用if，可以使用whether。
例如：If he comes or not doesn’t matter．应该为：It doesn’t matter if he comes or not．或Whether he comes or not doesn’t matter．that引导的主语从句放在句首时，that不能省略。
例如：That he was chosen made us very happy．注意这种结构构成的一些常见句型，如：It is said / reported that …．据说/据报道……。
It must be pointed out that …．必须指出的是……。
名词性从句详解及练习
各类从句详解英语从句可以分为名词性从句、定语从句和状语从句三大类：下面我们逐一进行说明：一、名词性从句（主语从句、表语从句、宾语从句、同位语从句）主语从句、表语从句、宾语从句和同位语从句在复合句中的充当的成分和其名称相同，分别作主句的主语、表语、宾语和同位语。
上述这四种从句均被称为名词性从句。
所有的名词性从句均不能用逗号分开，并且它们都用相同的关联词，关联词如下：①主从连词：that (无意义), whether (是否), if (是否)（在句子中不充当任何成分）②连接代词：who (谁), whom (谁), whose (谁的), what (什么), which (哪一个)③连接副词：when (什么时候), where (什么地方), how (怎样), why (为什么)主从连词只起连接作用，连接代词和连接副词除了起连接作用外，还充当从句某一个成分。
另外，可以用whatever, whichever, whoever, who(m)ever等连接代词引导名词性从句，来加强语气。
下面分别对各种名词性从句进行介绍（一）主语从句（subject clause）在主句中用作主语的主谓结构称之为主语从句。
例如：That he will come to the discussion is certain.他来参加讨论是确定的。
That the moon moves round the earth is well known to all of us.月球绕地球转动，这是我们大家都熟知的。
When the meeting is to be held has not yet been decide.会议什么时候召开还没有决定。
主语从句放在句首，句子常常显得比较笨重，因此通常可以把it放在句首，作形式主语，而将主语从句放在后面。
例如上面的句子可以分别改写为：It is certain that he will come to the discussion.It is well known to all of us that the moon moves round the earth.It has not yet been decide when the meeting is to be held.下面再举一些例句：What they are after is profit.他们追求的是利润。
03 同位语从句-中考英语总复习 重点语法精讲精练(全国通用)
同位语从句一．什么是同位语？Linda, my English teacher, is very beautiful.I will never forget him, a great leader and thinker.I put my favorite desk, that brown one, in the most outstanding place of this house.以上句子中标红的部分均为同位语。
所谓同位语，是对前面的名词进行解释说明，与前面的名词指的是同一事物或人，一般前后都用逗号隔开。
1.名词作同位语Mr. Wang, my child’s teacher, will be visiting us on Tuesday. 王先生，我孩子的老师，星期二要来看我们。
2. 短语作同位语I, the oldest girl in the family, always had to care for the other children. 我，作为家里最大的女孩，老得照料家中的其他孩子。
3.直接引语作同位语But now the question comes to their minds, “Did she die young because she was a clone?”但是现在他们不得不思考这样的问题：“多莉早死是因为它是一只克隆羊吗？”4.句子作同位语The girls were surprised at the fact that ocean ships can sail up the Great lakes.巨大的海轮可以开到五大湖，让表姐妹俩感到吃惊。
二．什么是同位语从句？上述第四种情况用句子对前面的名词做进一步解释，说明其内容叫做同位语从句。
三．同位语从句的连接词有哪些？引导同位语从句的词语通常有连词 that，whether，连接代词（what, which, who, whose）和连接副词(when, where, why, how)等。
名词性从句学案(语法精讲-主语从句、宾语从句、表语从句、同位语从句)+经典习题(含答案)
名词性从句名词性从句〔主语、表语、宾语、同位语从句〕（一）主语从句1．定义：用作主语的从句叫做主语从句。
2．构成：关联词+简单句3．引导主语从句的关联词有三类：(1) 附属连词that。
如：That they were in truth sisters was clear from the facial resemblance between them.很明显，她们确是亲姐妹，她们的脸型很相似。
(2) 附属连词whether。
如：Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。
(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词where, when, how, why。
如：What she did is not yet known. 她干了什么尚不清楚。
解释：1．主语从句能用it作形式上的主语。
常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。
如：It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。
如：It’s a pity that we can’t go. 很遗憾我们不能去。
C.It+seem, happen等不及物动词及短语+that从句。
如：It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。
英语句子成分主语谓语宾语表语定语状语补语同位语讲解
英语主谓宾表定状补成分精简讲解一．主语：主语(subject) 是一个句子的主题( theme)，是句子所述说的主体。
它的位置一般在一句之首。
可用作主语的有单词、短语、从句乃至句子。
1．名词作主语。
A tree has fallen across the road. (倒下横在)Little streams feed big rivers. ( 小河流入大江。
)2．代词用作主语。
You’re not far wrong. (你差不多对了)。
He told a joke but it fell flat. (他说了个笑话，但没有引人发笑)3．数词用作主语。
Three is enough. 三个就够了。
Four from seven leaves three. 7减4余3。
4．名词化的形容词用作主语。
The idle are forced to work. 懒汉被迫劳动。
Old and young marched side by side. 老少并肩而行。
5．副词用作主语。
Now is the time. 现在是时候了。
Carefully does it. 小心就行。
6．名词化的介词作主语。
The ups and downs of life must be taken as they come.7．不定式用作主语。
To find your way can be a problem.你能否找到路可能是一个问题。
It would be nice to see him again.8．动名词用作主语。
Smoking is bad for you. Watching a film is pleasure,but making one is hard work.9．名词化的过去分词用作主语。
The disabled are to receive more money. The deceased died of old age.10.介词短语用作主语。
同位语和主语和名词性从句详解
同位语从句是名词性从句（主语从句、表语从句、宾语从句、同位语从句,介宾从句）中的主要从句之一，从句作同位语表示与之同位的名词（短语）的实际内容，它的作用相当于名词，对前面的名词（短语）加以补充说明或进一步解释，相当于一个表语从句，它们之间的关系是同位关系，即主表关系。
类型：1、名词作同位语：Mr Wang,my child’s teacher,will be visiting us on Tuesday.2、句子作同位语：The girls were surprised at the fact that ocean ships can sail up the Great lakes.巨大的海轮可以开到五大湖，让女孩们感到吃惊。
3、直接引语作同位语：But now the question comes to their minds，“Did she die young because she was a clone?”但是现在他们不得不思考这样的问题：“多莉早死是因为它是一只克隆羊吗？”用法：1、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（一般的“抽象”名词都可用）。
I’ve come from Mr wang with a message that he won’t be able to see you this afternoon．2、英语中引导同位语从句的词通常有连词that，whether，连接代词what，who。
连接副词how,when,where等。
（注：if,which 不能引导同位语从句。
）He must answer the question whether he agrees to it or not.3、有时同位语从句可以不紧跟在说明的名词后面，而被别的词隔开叫做间隔同位语从句。
主语从句、表语从句、同位语从句练习五篇范文
主语从句、表语从句、同位语从句练习五篇范文第一篇：主语从句、表语从句、同位语从句练习主语从句1.________ they are most interested in is how they can produce more and better cars.A.ThatB.WhatC.WhatD.That 2.________ we'll go camping tomorrow depends on the weather.A.IfB.WhetherC.ThatD.Where 3.________ makes mistakes must correct them.A.WhatB.ThatC.WhoeverD.Whatever 4.________ surprised me most was that such a little boy of seven could play the violin so well.A.ThatB.WhatC.ThatD.When 5.________ we go swimming every day ________ us a lot of good.A.If …doB.That …doC.If …doesD.That…does 6.It ________ Bob drives badly.A.thinks thatB.is thought whatC.thought thatD.is thought that 7.It's uncertain ________ the exhibition will be hold in Shanghai.A.ifB.thatC.whetherD.how 8.________ the boy didn't take medicine made his mother angry.A.ThatB.WhatC.HowD.Which 9.________ we can't have seems better than that we have.A.WhatB.WhoC.ThatD.whose 10._______ you don't like him is none of my business.A.WhatB.WhoC.ThatD.Whether表语从句1.The question is _______ we will have our sports meet next week.A.thatB.ifC.whenD.whether 2．The reason why he failed is _______ he was too careless.A.becauseB.thatC.forD.because of 3.Go and get your coat.It's _______ you left it.A.whereB.thereC.there whereD.where there 4.The problem is _______ to take the place of Ted.A.who can we getB.what we can getC.who we can getD.that we can get5.What I want to know is ______ he likes the gift given by us.A.thatB.ifC.whetherD.不填 6.The reason is _______ I missed the bus.A.thatB.whenC.whyD.what 7.That is _______ we were late last time.A.thatB.whenC.whyD.what 8.She looked _______ she were ten years younger.A.thatB.likeC.asD.as though 9.---I feel sick!---I think it is _______ you are doing too much.A.whyB.whenC.whatD.because 10.The reason why he hasn't come is ______.A.because his mother is illB.because of his mother's being illC.that his mother is illD.for his mother is ill同位语从句rmation has been put forward ____ more middle school graduates will be admitted into universities.A whileB thatC whenD as 2.The news ____ he was kidnapped surprised us greatly.A.whatB.thatC.whyD.when 3.His suggestion ____ the meeting be delayed wasturned down.A.whichB.thatC./D.it 4.I have no idea ____ he will start.A.whenB.thatC.whatD./5.I've come from the government with a message ____ the meeting won't be held tomorrow.A.ifB.thatC.whetherD.which 6.The thought ____ he might fail in the exam worried him.A.whenB.whichC.whatD.that 7.The order ____ the prisoner be set free arrived too late.A.whichB.whetherC.thatD.what 8.He often asked me the question ____ the work was worth doing.A.whetherB.whereC.thatD.when9.The other day, my brother drove his car down the street at ____ was thought a dangerous speed.A.asB.whichC.whatD.that10.The nurses are trying their best to reduce the patient'sfear ____ he would die of the disease.A.thatB.asC.of whichD.which第二篇：表语从句练习1.The question is ________ we will have our sports meet next week.A.that B.if C.when D.whether2．The reason why he failed is ________he was too careless.A.because B.that C.for D.because of 3.Go and get your coat.It’ s ________you left itA.whereB.thereC.there whereD.where there 4．The problem is _________to take the place of TedA.who can we getB.what we can getC.who we can getD.that we can get 5.What I want to know is ______ he likes the gift given by us.A.that B.if C.whether D.不填6.The reason is_________I missed the bus.A.that B.when C.whyD.what 7.That is __ ___ we were late last time.A.that B.when C.whyD.what8.She looked _________ she were ten years younger.A.thatB.likeC.asD.as though 9.—I felt sick!--I think it is _______ you are doing too much.A.why B.when C.what D.because 10.The reason why he hasn’t come is ___________.A.because his mother is ill B.because of his mother’s being ill C.that his mother is ill D.for his mother is ill 11.—He was born here.--That is _______ he likes the place so much.A.that B.what C.why D.how 12.That is ______ Lu Xun once lived.A.what B.where C.that D.why13．_______your father wants to know is________ getting on with your studies.A.What;how are you B.That；how you are C.How；that you are D.What；how you are 14.The troubleis__________we are short of tools.A.what B.that C.how D.why that15.America was __________was first called ―India‖ by Columbus.A.what B.where C.the place D.there where16.China is becoming stronger and stronger.It is no longer_________.A.what it used to be B.what it was used to beingC.what it used to beingD.what it was used to be17.________he really means is ________he disagrees with us.A.What … that B.That … whatC.What … whatD.That … what 18.The energy is ________ makes the cells able to do their work.A.that B.which C.whatD.such19.—I drove to Zhuhai for the air show last week.—Is that_____ you had a few days off？（NMET1999）A.why B.what C.when D.where.I had neither a raincoat nor an umbrella ____I got wet through.（1998 上海）A.It’s the reason B.That’s whyC.There’s whyD.It’s how21.See the flags on top of the building? That was ______ we did this morning.（06 全国）A.when B.which C.where D.what22.---Are you still thinking about yesterday’s game?(2003北京春)---Oh, that’s _____.A.what makes me feel excited B.wha teverI feel excited about C.how I feel about it D.when I feel excited23.What surprised me was not what he said but ______ he said it.（2004湖北）A.the way B.in the way that C.in the way D.the way which 24.-I drive to Zhuhai for the air show last week.-Is that __you had a few days off?(NMET1999)A.why B.when C.what D where 25.The question is ____it is worth visiting.A.if B.as if C.whether D.how 26.This is _____it happened.A.what B.whenC.thatD.how 27.This is ____ the city lies.A.which B.what C.whereD.when 28.He was ill.That is ____he didn’t comeyesterday.A.when B.why C.how D.that 29.That was ___ I was thirteen I entered the No.1 Middle School.A.because B.why C.how D when 30.The problem is ____we can master modern science and technology in a short time.A.if B.that C.what D.how 31.–Doesn’t Mr.Smith live on this street?-No.This is ____Mr.Brown lives.A.which B.where C.how D.that 32.The reason why he has been such a success is ____he never gives up.A.what B.where C.how D.that 33.–what is that building?-___the gar den equipment is stored A.that’s where B.There is in which C.the building is D.That’s the building which 34.Our village is no longer ____over twenty years ago.A.what was itB.what it wasC.the village what wasD.what was the village 35.___you are the first one here.A.it seems that as if B.it seems as if that c.it seems as if D.It seems that as though 36.My hope is ___he will become a doctor in the future.A.if B.whether C.that D.what 37.it was ___they were used as an advertisement for the shop.A.because B.which C.what D.if 答案：1-5DBACC6-10ACDDC11-15CBDBA16-20AACAB21-25DAAAC26-30DCBAD31-35BBABC36-37CA 2第三篇：浅议同位语从句浅议同位语从句夏文华（河北省迁安市教师进修学校邮政编码：064400）摘要：同位语从句是中学阶段比较常见的语法现象，为了使学生更好地理解并掌握这一语法现象，本文从同位语从句的含义、正确运用同位语从句的引导词以及同位语从句和定语从句的区别等几个方面对同位语从句进行了探讨和分析。
高考英语专项复习：主语从句讲解及练习(附答案)
主语从句讲解及练习主语从句一、概述：在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。
二.主语从句主要有三类：（1）由连词that引导的主语从句:引导词that无含义,在句中不做成分,不可以省。
例如：That you will win the medal seems unlikely.你想获得奖牌看起来是不可能的。
That you are so indifferent bothers me.你如此冷淡使我很烦恼。
That she survived the accident is a miracle.她在事故中幸免于难简直是奇迹。
（2）用连词whether 引导的主语从句:whether有含义(是否),在句中不做成分,不可以省。
例如：Whether she is coming or not doesn’t matter too much.她来不来都无关紧要。
（3）用连接代词引导的主语从句(在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分).例如：What you need is more practice.你所需要的是更多的训练。
What I want to know is this. 我想知道的就是这事。
Whatever we do is to serve the people.我们无论做什么都是为人民服务。
（4）连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。
)eg:Where we should leave it is a problem.When they will come hasn’t been made pubic.他们什么时候来还不知道。
同位语和主语和名词性从句详解
同位语从句是名词性从句（主语从句、表语从句、宾语从句、同位语从句,介宾从句）中的主要从句之一，从句作同位语表示与之同位的名词（短语）的实际内容，它的作用相当于名词，对前面的名词（短语）加以补充说明或进一步解释，相当于一个表语从句，它们之间的关系是同位关系，即主表关系。
类型：1、名词作同位语：Mr Wang,my child’s teacher,will be visiting us on Tuesday.2、句子作同位语：The girls were surprised at the fact that ocean ships can sail up the Great lakes.巨大的海轮可以开到五大湖，让女孩们感到吃惊。
3、直接引语作同位语：But now the question comes to their minds，“Did she die young because she was a clone?”但是现在他们不得不思考这样的问题：“多莉早死是因为它是一只克隆羊吗？”用法：1、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（一般的“抽象”名词都可用）。
I’ve come from Mr wang with a message that he won’t be able to see you this afternoon．2、英语中引导同位语从句的词通常有连词that，whether，连接代词what，who。
连接副词how,when,where等。
（注：if,which 不能引导同位语从句。
）He must answer the question whether he agrees to it or not.3、有时同位语从句可以不紧跟在说明的名词后面，而被别的词隔开叫做间隔同位语从句。
从句语法详讲：主语从句、表语从句、状语从句、定语从句、同位语从句
《高中英语语法详细讲解》主语从句（3-5）、同位语从句（5-9）、表语从句（9-12）、定语从句（12-22）、非限制性定语从句（22-24）、状语从句（24-37）一、名词性从句百科名片在句子中起名词作用的句子叫名词性从句 (Noun Clauses）。
名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，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。
名词性从句高考热点透视1. ___ is a fact that English is being accepted as an international language. (NMET 1995)A. ThereB. ThisC. ThatD. It答案D。
当名词从句在句中作主语时，为避免句子头重脚轻，常用it作形式主语置于句首，而将真正的主语从句放在句尾。
此时it只起先行引导作用，本身无实义。
此句也可以改写为：That English is being accepted as an international language is a fact.2．A computer can only do ____ you have instructed it to do．（NMET2001）A．how B．after C．what D．when答案C。
从句子结构可知，句子的空白处应该填引导宾语从句的连词，做主句谓语动词do的宾语，同时该连接词还是从句中的do的宾语，因此，此处的连接词应该用what。
3. He asked ____ for a violin．（MET1992）A. did I pay how muchB. I paid how muchC. how much did I payD. how much I paid答案：D。
宾语从句相当于特殊疑问句，句子语序要用陈述语序。
完整版)高中-同位语从句详细讲解与练习(附答案)
完整版)高中-同位语从句详细讲解与练习(附答案)同位语从句是用作同位语的从句，通常用于解释或说明先行词。
常见的先行词有fact、news、idea、thought、n、reply、report、remark等。
连接同位语从句的从属连词多为that，有时也可以用whether。
例如：They were all very worried that you were sick。
这件事让他们都非常担心。
I have no idea whetherhe'll come or not。
我不知道他是否会来。
除了that之外，连接代词who、which、what和连接副词where、when、why、how也可以引导同位语从句。
例如：The n who should do the work requires ___。
谁该干这项工作，这个问题需要考虑。
___ where we are going to ___。
我们还没有决定去哪里度暑假的问题。
同位语从句与定语从句的区别在于，同位语从句只起连接从句的作用，没有实际意义，且不能省略连接词that。
而定语从句则起到限定作用，可以用关系代词who、which、that等引导，且连接词可以省略。
例如：The book that ___。
我昨天买的那本书很有趣。
同位语从句是指在复合句中作为同位语的从句，一般紧跟在某些名词后面，用以说明该名词表示的具体内容。
比较常用的名词有news，idea，fact，promise，n，doubt，thought，hope，message，n，words（消息），possibility等。
例如，I heard the news that our team had won.（我听到了我们队获胜的消息。
）同位语从句的引导词包括连词that，whether，连接代词和连接副词等。
在某些名词后面的同位语从句要用虚拟语气，如demand。
wish。
主语从句,同位语从句
主语从句1．定义：用作主语的从句叫做主语从句。
2．构成：关联词+简单句3．引导主语从句的关联词有三类：(1) 从属连词that。
如：That they were sisters was unknown to anyone.她们是姐妹这件事好象没任何人知道。
(2) 从属连词whether。
如：Whether he’ll come here isn’t clear.他是否会来这里还不清楚。
(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词where, when, how, why。
如：What she did is not yet known. 她干了什么尚不清楚。
How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚。
Whoever comes is welcome. 不论谁来都欢迎。
Wherever you are is my home ---- my only home. 你所在的任何地方就是我的家----我唯一的家。
解释：1．主语从句能用it作形式上的主语。
常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。
如：It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
It is probable that he told her everything. 很可能他把一切都告诉她了。
B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。
英语专业四级主语从句和同位语从句
3. The news ____ he was kidnapped surprised us greatly. A. what B. that C. why D. when
A. Whoever B. However C. Whatever D. Whenever
4. Whether that is a good solution depends
on__A__
.
A. how you look at it B. you look at it
C. that you look at it D. what you look at it
析：the sports meeting will be held on time意义不完整，应加" 是否"的含义才能表达the problem的全部内容，因此应用whether 引导同位语从句。
练习
1. Information has been put forward ____ more middle school graduates will be admitted into universities. A. while B. that C. when D. as
8.He often asked me the question ____ the work was worth doing. A. whether B. where C. that D. when
主语从句
连 that, whether
词
如果充当主语的成分 是一个句子，那么这
初中英语同位语从句、主语从句及表语从句
初中英语同位语从句、主语从句及表语从句同位语从句，主语从句和表语从句一、同位语从句1.同位语：当两个指同一事物的句子成分放在同等位置时，一个句子成分被用来说明或解释另一个句子成分，前者就叫做后者的同位语。
这两个句子成分多由名词或代词担任。
同位语通常放在其说明的名词或代词之后。
eg:We have two children, a boy and a girl.eg:We ,the chinese people , are determinded to build China into a powerful an prosperous country.2.同位语从句：与先行词（名词或代词）同位或等同的从句叫做同位语从句。
同位语从句的先行词多为fact, news, idea, opinion, thought, suggestion, promise, word(消息), message, request, order, proposal, plan, question等，多由连接代词that引导。
eg:The fact that the money has gone doesn’t mean it was stolen.eg:The hope that he may recover is faint.3.同位语从句的引导词及特点：1）连接代词that 引导的同位语从句中，that只起连接作用,不充当句子的成分。
2）连接代词who, which, what和连接副词where, when, why, how引导的同位语从句中，其引导词在句子中起连接作用即将主句与从句连接起来，且要在从句中充当成分。
3）从属连词whether, if引导同位语从句中，whether, if只起连接作用，不在句子中充当成分，也不替代先行词。
注：连接代词与连接副词，关系代词与关系副词的区别如下：连接代词和连接副词是引导同位语从句的，其在句子中起连接作用即将主句与从句连接起来，且要在从句中充当成分（that除外）；关系代词与关系副词是引导定语从句的，其在句子中除了具备与连接代词和连接副词同等的作用外，即起连接作用（连接主从句），在句子中充当成分，而且还要替代先行词。
必考点04 主语、表语与同位语从句(解析版)
必考点04 主语、表语与同位语从句题型一主语从句【解题技巧提炼】在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用,这类从句又可分为主语从句、宾语从句、表语从句和同位语从句。
所以充当主语的从句叫主语从句。
主语从句的常用引导词有：（1）连接词that;（2）连接词whether;（3）连接代词:what, who, which, whom, whose,whatever, whoever, whomever, whichever等;（4）连接副词:when, where, how, why, whenever, wherever 等。
一、that引导的主语从句1.that引导主语从句时只起连接作用,在句子中不作任何成分,也无任何意义。
that引导主语从句时通常不能省略,尤其是位于句首时。
*That he will win the medal seems unlikely.他似乎不大可能获得奖牌。
2.有时为了平衡句子结构,用it充当形式主语,而将that从句置于后面。
*It is certain that she will do well in her exam.毫无疑问,她考试成绩会很好。
3.主语从句中常用it作形式主语的句型有:(1)It+be+形容词(clear, obvious, true, possible, certain, important, necessary, strange, natural, likely, surprising, vital等) + that从句*It is obvious that he has done what he can to help you.很明显,他已经尽了最大努力来帮助你。
(2)It+be+名词(词组)(a pity, a shame, an honour, a fact, no wonder, no surprise等) + that从句*It’s an honour that we have been invited to the party.很荣幸我们能被邀请参加宴会。