名词性从句
名词性从句一.什么是名词性从句？在主句充当名词通常能够充当成分的从句，叫名词性从句。
主语从句，宾语从句，表语从句，同位语从句。
What I need is a new desk.He said that he will leave for Beijing next week.His question is when the sports meet will take place.He told me a lie that he had learned five foreign languages.从以上例句中，可以看出名词性从句没有先行词。
同位语从句的情况待后面解释。
不同的从句在以后的讲解中我们会逐渐熟悉。
二．连接词。
1.That 不充当任何成分，没有任何意思，只起连接作用。
发生了这场事故是你的错。
That the accident happened is your fault.I had no idea that you were here.以上两句中，that 不可省略，只能在宾语从句中省略。
如果省略的话，句子的意思不清，句子成分也不明。
2.whether, if ( 不做句子成分，有意思，有连接作用)The question is whether the book is worth reading.Whether the pollution can be controlled depends on the effect we will make.以上两句不能用if代替whether.If 只能用于宾语从句，但不能用于介词宾语从句。
He didn’t make sure if (whether)he would take p art in the party.Everything depends on whether we have enough experience.3.连接代词或连接副词（所有疑问代词和疑问副词都可以转为连接代词或连接副词）（做句子成分，有意思，有连接作用。
）Where they will make the experiment is twenty miles away from the city.Who will be the conductor has not been decided.三．需要注意的情况。
1.whatWhat he says is different from what he does.What he left me is an expensive pen.What he left me are a few old books.2.whoever, whateverWhoever borrowed books from the library must return(Anyone who)them on time.They gave a present to whoever attended the meeting.(everyone who)Take whatever you want.Each of us should do whatever work fit for his brains and ability.3.形式主语。
1) It is said that ….It is reported that…It is thought that …It has not been decided that / when…2) It is important that…It is necessary that…It is strange that…3) It is a pity that…It is an honour that…It is a question where…It is reported that a new library for studying SARS would be set up in Zhongshan University.Isn’t it strange that she has left without telling us.It is still a question when we shall hold the sports meet.4) 形式宾语We all thought it a pity that the equipment had been damaged.I found it very important whether we can completed the work on time.5) as if, as though, because 可以引导表语从句。
He looks as if he woke up just a minute.( as though)It is because we are closer to the sun in summer than we are in winter.It is why summer is hot while winter is cold.The reason why summer is hot while winter is cold is that we are closer to the sun in summer than we are in winter.6) think, believe, suppose, expect 后宾语从句的用法。
I don’t believe that they we finished their work.I don’t suppose that he will come, will he?名词性从句与定语从句的区别一．定义在句中修饰名词的从句是定语从句。
在句中充当名词通常所充当的成分的从句是名词性从句。
I don’t know when they will put the plan into practice.(the time when)I can’t remember the day when they will have the meeting.He told me that an accident happened at the school gate.He told me an accident that happened at the school gate.定语从句有先行词。
名词性从句没有先行词。
二．关系词连接词that thatwho/whom who / whom / whoeverwhich whichwhose whosewhatwhen whenwhere wherewhy whyhow long / soon /often / faras as if as thoughbecausewhether if1.thatHe told me that an accident happened at the school gate.He told me an accident that happened at the school gate. 2.which, whose1) 我不知道他想要哪本字典。
2) 我不想买他谈到的那本字典。
3) 你能看到那座山顶覆盖着白雪的山吗？4)你知道谁的设计最优秀?I don”t know which dictionary he wanted.I don’t want to buy the dictionary which he referred to.Can you see the mountain whose top is covered with snow?Do you know whose design is the most excellent?（只能代表人）which 代表整个主句.3.whatWhat you said is correct.All that you said is correct.4.howCould you tell me a better way (in which / that ) we can( how new can deal with the problem.) deal with the problem.You English level depends on how often you use it.三．同位语从句与定语从句的区别1. 看是否在从句中作成分。
Do you know the fact that he told me yesterday.Do you know the fact that he told us a lie yesterday.2．看w…词是否代表先行词，或先行词是否与从句的内容一致。
They helped us settle the problem where we can hold the party.They want to find a proper hall where we can hold theparty.四．强调句型It is / was + 强调成分+that / who/whom+其他成分I saw your father in the park this morning.It was I that / who saw your father in the park this morning.It was your father that / whom I saw in the park this morning.It was in the park that I saw your father this morning.It was this morning that I saw your father in the park.名词性从句一．什么是名词性从句？在主句充当名词通常能够充当成分的从句，叫名词性从句。
主语从句，宾语从句，表语从句，同位语从句。
What I need is a new desk.He said that he will leave for Beijing next week.His question is when the sports meet will take place.He told me a lie that he had learned five foreign languages.二．连接词。
1.That 不充当任何成分，没有任何意思，只起连接作用。
发生了这场事故是你的错。
名词性从句讲解(最全版)
名词性从句讲解(最全版)名词性从句是一个从句，它在句子中充当名词的角色。
它可以作为主语、宾语、表语、同位语或介词宾语。
名词性从句通常由连接词引导，如that、whether、if、who、whom、whose、which、what等。
1. 作为主语：名词性从句可以作为主语，取代一个名词或名词短语，引导词通常为that或whether。
例如：- What you said is true.（你说的是真的。
）- Whether he will come is still uncertain.（他是否会来还不确定。
）2. 作为宾语：名词性从句可以作为及物动词或介词的宾语，引导词通常为that、whether、if、who、whom、whose、which、what等。
例如：- She asked me what I wanted.（她问我想要什么。
）- I don't know if/whether he will come.（我不知道他是否会来。
）3. 作为表语：名词性从句可以作为系动词的表语，引导词通常为that、whether、who、whom、whose、which、what等。
例如：- The problem is that she doesn't understand.（问题在于她不理解。
）- The question is who will take care of them.（问题是谁会照顾他们。
）4. 作为同位语：名词性从句可以作为同位语，解释或说明前面的名词或代词，引导词通常为that、whether、who、whom、whose、which、what等。
例如：- The fact that he lied surprised me.（他撒谎的事实让我感到惊讶。
）- His belief that she will succeed is unwavering.（他坚信她会成功。
名词性从句
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三、宾语从句
在句中充当及物动词或介词宾语的句子叫做 宾语从句。 我不知道你会来这里。 I don’t know （that） you will come here.
三、宾语从句
1、用作及物动词的宾语 (1) They pretended that they were reading in the room. (2) I didn’t know what they were talking about.
以it作形式主语，把主语从句后置的常 用句型有：
1. It+be+形容词+that从句
It is/was certain that – clause
clear
important necessary probable possible
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（1）It is certain that she will do
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一、主语从句
在句中充当主语的从句叫做主语从句。 他星期三来这里是肯定的。
That he will come here on Wednesday is certain.
注意：从句作主语时，就算是句子意思完整，都 要加上从属连词that, 而且that不能省略,不充当 成分仅起连接作用。 他星期三是否来这里还不肯定。 Whether he will come here on Wednesday is not certain. 注意：主语从句表示“是否” 只用 “whether” 而不用“if”
well in her exam.
（2） It is probable that he told her everything.
www.010englBiblioteka 出品
名词性从句
语序：陈述语序
在句中充当主语的从句称为主语 从句。英语中主语从句的句型可分 为两大类： 直接将主语从句放在主语位置上； 用it作形式主语，将真正的主语从 句后移，放在其他成分后。
让我们先说说第一类吧！
一、连接词（只起连接作用，在从句中不充当句子成分）
that：无词义。 e.g.: 他赢得比赛一事在我国引起巨大轰动。 That he won the game made a tremendous stir in our country. whether：“是否”。可单独使用，也可与or或or not连用。 e.g.: 我们明天是否能去春游取决于天气。 Whether we can go for a spring outing depends on the weather. 他们是否会来还未告诉我们。 Whether they will come has not been told to us.
四、主语从句与主谓一致
一个从句作主语时，谓语动词通常用单数形式， 特别是用it作形式主语的句型。 e.g.: Whether this kind of chemicals is better has not been tried.
当what引导主从，应遵循意义一致原则，谓语动 词选用相应形式。表语是复数时，谓语动词用复数 形式。 e.g.: What we do willingly is easy. What they were searching for were the missing gems.
Introduction
名词性从句：包括四种：主语从句、表语从句、宾语从
句、同位语从句。
连词：引导名词性从句的连词有以下三类
连接词：只起连接作用，在从句中不充当句子成分； 连接代词：连接主从句，并在从句中作主语/宾语/表 语/定语； 连接副词：连接主从句，并在从句中作时状/地状/原 因状/方式状。
名词性从句的种类与作用
名词性从句的种类与作用名词性从句是指在句子中充当名词的句子成分，它能够承担名词所具有的各种功能，如主语、宾语、表语、同位语等。
名词性从句的使用可以使句子更加丰富，表达更加准确。
本文将介绍名词性从句的种类及其作用。
一、主语从句主语从句是名词性从句的一种常见形式，它在句子中充当主语的角色，起到句子的主题和核心的作用。
主语从句通常以“that”或“whether”引导。
例如：1. That he is a talented musician is well known to everyone.2. Whether she will come to the party is still uncertain.主语从句常常用于强调句和形式主语的表达中，使句子更加生动有力。
二、宾语从句宾语从句作为动词的宾语出现，可以回答“what”、“where”、“which”、“who”等疑问词引导的问题。
它常见于及物动词后，也可用于介词后。
例如：1. She asked me what I wanted for dinner.2. He told me where he had been yesterday.宾语从句的作用是充当动词的宾语，使句子更加完整，表达更加准确。
三、表语从句表语从句用来修饰名词或代词，充当表语的角色，常以“that”或“whether”引导。
表语从句通常出现在“be”动词后或感官动词后。
例如：1. The question is whether we should go or stay.2. His wish is that he could travel around the world.表语从句可以在句中起到进一步解释、说明或补充的作用，使句子更加丰富多样。
四、同位语从句同位语从句指的是对名词或代词进行解释、说明或补充的句子，常见于名词后面，起到进一步解释名词的作用。
同位语从句通常以“that”引导。
名词性从句
名词性从句1.名词性从句的定义名词性从句是起名词作用的从句，这些从句可以作为一个整体来看，其作用就相当于一个名词，在复合句中作主语，宾语，表语和同位语。
名词性从句包括主语从句，表语从句，宾语从句，同位语从句四种。
2.名词性从句的连接词名词性从句通常由一个连接词和主句相连。
连接词很重要，它既是联系主句的纽带，又是从句的标志，通过连接词，我们可以辨认不同从句的性质。
一．从属连接词（在从句中不充当任何成分，只起到连接从句的功能）A．that 只是引导名词性从句，本身并没有实际意义，在从句中不充当任何句子成分。
That he will come to the meeting is certain.(主语从句)The fact remains that we are behind the other group.(同位语从句)B．if和whether具有“是否”的意义，但是whether比较正式，在口语中人们经常if, if 和whether在名词性从句中尽管不充当任何的成分，但不可以省略。
C．whether不能替代if的情况1.if只能引导宾语从句（做介词宾语的情况除外），而whether 可以引导所有的名词性从句。
She asked if/ whether that was enough.Whether the football match will be played depends on the whether.The question is whether we can arrive there on bus.2.whether引导宾语从句做介词的宾语，if没有这种用法It depends on whether it will be fine.3.whether后紧跟不定式He was wondering whether to go home.4.or not 可直接跟在whether后面，但不可以直接跟在if后面。
名词性从句的三种类型及例句解析
名词性从句的三种类型及例句解析名词性从句是指在一个句子中充当名词的从句。
它可以作主语、宾语、表语和同位语等，并能够起到连接子句与主句的作用。
在英语语法中，有三种主要类型的名词性从句：宾语从句、主语从句和表语从句。
本文将详细解析这三种类型，并举例说明其用法。
一、宾语从句宾语从句作为一个整体出现在主句中的动词后面，充当主句的宾语。
它常常引导由that、whether/if、wh-疑问词引导的从句。
下面是一些例句：1. 主句：He asked me a question.宾语从句：He asked me whether I had finished my homework.解析：宾语从句"whether I had finished my homework"作为动词"ask"的宾语，表达了一个疑问。
2. 主句：She doesn't know the answer.宾语从句：She doesn't know what the answer is.解析：宾语从句"what the answer is"作为动词"know"的宾语，表示对答案的不知道。
3. 主句：They wonder if he will come to the party.宾语从句：They wonder if/whether he will come to the party.解析：宾语从句"if/whether he will come to the party"作为动词"wonder"的宾语，表达了对他是否会来参加派对的疑问。
二、主语从句主语从句作为一个整体出现在句子的最前面，充当主句的主语。
它通常由that引导，也可以由wh-疑问词引导。
以下是一些例句：1. 主句：It is important to learn a foreign language.主语从句：That she is a hardworking student is important.解析：主语从句"That she is a hardworking student"作为句子的主语，强调了她是一个勤奋的学生的重要性。
名词性从句完整版
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从出题者的角度，就是要考察名词性从句中的语序以及引导词之间的区别。有时候，会结合插入语或名词与同位语隔开，或使句子结构复杂化等使得难度增加。其实，总的难度和变化都不大。但是从考生的角度来说，如果考生对句子结构掌握不过硬，对某些词或词组的用法不了解，就会容易造成和定语从句、状语从句的混淆，造成根本环节的误判而用其他从句的规则去解题。造成丢分。
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⒊连接副词：引导从句并作从句的状语 when—表示时间 where—表示地点 why—表示原因 how—表示方式 ①When we’ll have a meeting is not decided. ②I don’t know where I can buy such a book . ③ Why he did it will remain a puzzle forever. ④The question is how we should carry out the plan.
正：It was doubtful if /whether Mary really heard him.
误：If Mary really heard him is really doubtful.
正：Whether Mary really heard him is really doubtful.
eg.Wherever he goes makes his parents worry.
( 主语从句)
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注意：
如何选用连接词？
用法规则:
先根据从句的结构确定用哪种连接词，从句
不缺成分用连词，缺主语、宾语、表语、定语用
连接代词，缺状语用连接副词，再根据从句意思
名词性从句
名词性从句分类
名词性从句定义：功能上相当于一个名词，可以 在复合句中作主语、宾语、表语、同位语。 名词性从句分为：主语从句、宾语从句、表语从 句、同位语从句。请顾名思义。
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名词性从句引导词
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连接连词：that，whether，if
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连接代词：what，who，whom，which，whose， whatever，whichever，whoever等。 连接副词：where，when，why，how，whenever， wherever，however等。
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连接连词：that，whether， if
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that在名词性从句中无意义，不作成分（名词性 从句不缺主语、宾语、表语等，且意义完整时， 考虑that。 whether和if在名从中不作成分，意为“是否”。 名从不缺主语、宾语、表语等，但是缺少“是否 ”这个意思时，考虑whether和if。
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what，who，whom，which
主语从句注意事项
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单个主从作主语，主句谓语用单数 当that不在句首，而是如“it is/was+形容词/名 词/-ed+that从句”之类的句子一样，出现在后面 时，that可省略。此时，it为形主，that引导的 从句为真正主语。
宾语从句注意事项
that在宾语从句中一般可省略。 that在宾从中，在以下情况下不省略：
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名从缺主、宾、表，指物，用what，意为“什么 ”；名从缺定，表“什么样的”，用what。 名从缺主、宾、表，指人，用who或whom（whom专 作宾）意为“谁”。
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which意为“哪一个，哪一些”，可作主、宾、表 、定。请注意与what之间区分，两词意思不同。
名词性从句
3) It +不及物动词+从句
It happened that...
碰巧……
It occurred to me that…我突然想起…
*_I_t _h_a_p_p_en_e_d__th_a_t___(刚好)I came into the office at that time.
*_It_o_c_c_u_r_re_d__to__m_e_t_h_a_t ___(我突然想起)I forget to sent the letter.
3. 作形容词或过去分词的宾语，例如:
I am afraid (that) I’ve made a mistake.
I am sure (that) he will win the game.
She was surprised/pleased that he had passed the exam.
The fact is that we have lost the game.
表语从句
The news that we won the game is exciting.
同位语从句
引导名词性从句的连接词可分为三类: 连接词: that, whether, if 连接代词: what, whatever, who, whoever, whomever，which ，whichever，whose. 连接副词: when, where, how, why
什么是名词性从句
什么是名词性从句？名词性从句（Noun Clauses）是一个在句子中充当名词的从句。
它可以在句子中担任主语、宾语、表语或补语的角色。
名词性从句通常由连词引导，例如that, whether, if, who, whom, whose, what, which, when, where, why等。
以下是名词性从句在不同角色中的示例：1. 主语（Subject）：- What she said surprised me.（她所说的让我感到惊讶。
）- Whether we go or not is up to you.（我们去与否由你决定。
）2. 宾语（Object）：- I know that he is coming.（我知道他要来。
）- She asked me where I was going.（她问我要去哪里。
）3. 表语（Predicate）：- The problem is how to solve it.（问题是如何解决它。
）- His wish is that everyone gets along.（他的愿望是每个人和睦相处。
）4. 补语（Complement）：- The important thing is what you do next.（重要的是你接下来要做什么。
）- His goal is to become a doctor.（他的目标是成为一名医生。
）名词性从句的使用可以使句子更加丰富和灵活，它可以替代一个独立的名词，并在句子中承担相应的语法角色。
名词性从句可以用于各种不同的语境，包括陈述句、疑问句和感叹句等。
需要注意的是，名词性从句的引导词可以根据从句的具体内容和功能而有所不同。
因此，在使用名词性从句时，我们需要根据语境和句子的需要选择适当的引导词。
了解和掌握名词性从句的概念和用法，可以帮助我们在英语表达中更加灵活和准确地使用不同类型的从句。