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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。
名词性从句解析名词性从句是英语中一种重要的从句结构，它在句子中充当名词的成分。
名词性从句可以作为主语、宾语、表语和同位语，它的引导词包括连接代词和连接副词。
名词性从句可以帮助我们丰富句子结构，增强表达的准确性和多样性。
接下来，本文将对名词性从句进行详细解析，并给出一些例子来说明其用法。
一、名词性从句作主语名词性从句作主语时，常用的引导词有：that、whether、if、what、who、which等。
以下是几个例子：1. That he is innocent is beyond doubt.（他无辜是毫无疑问的。
）2. Whether he will come to the party is still uncertain.（他是否会来参加派对还不确定。
）3. If she can finish the work on time remains to be seen.（她能否按时完成工作还有待观察。
）4. What you said doesn't make any sense.（你说的话没有任何意义。
）5. Who will be the next president is under discussion.（谁将成为下一任总统正在讨论中。
）二、名词性从句作宾语名词性从句作宾语时，常用的引导词有：that、whether、if、what、who、which等。
以下是几个例子：1. He knows that I am telling the truth.（他知道我说的是真话。
）2. I'm not sure whether it will rain tomorrow.（我不确定明天是否会下雨。
）3. I wonder if he has received my email.（我想知道他是否收到了我的电子邮件。
）4. Please tell me what you want for dinner.（请告诉我你想要吃什么晚餐。
考点08名词性从句（核心考点精讲精练）【近年真题考点分布】【思维导图】【知识梳理】➢考点一：宾语从句1．宾语从句的引导词She asked me whether I had returned the books to the library，and I admitted that I hadn't.她问我是否把书还给图书馆了，我承认我还没有还。
Our teacher always tell us to believe in what we do and who we are if we want to succeed.我们的老师总是告诉我们，如果我们想成功的话，就要相信我们所做的事情以及我们自己。
宾语一般放在及物动词或介词之后，但是，在下列情况下，须用it作形式宾语，而将真正的宾语(常为不定式/从句)后置。
(1)动词find/feel/think/consider/make＋it＋宾补(形容词或名词)＋不定式/从句(2)动词hate/ like/ dislike/ appreciate/enjoy＋it＋从句(3)短语动词see to/ depend on/rely on＋it＋从句(4)固定搭配take it for granted that/owe it to sb.that＋从句No matter where he is，he makes it a rule to go for a walk before breakfast.无论他在哪里，他都定了一个规矩——早餐前散步。
I shall see to it that he is taken good care of when you are absent.你不在的时候，我负责把他照顾好。
I think it necessary that we take plenty of boiled water every day.我认为我们每天多喝白开水是有必要的。
名词性从句专题在一个句子中，名词能作主语、宾语、表语和同位语。
当我们在一个句子中用一个句子来担当主语、宾语、表语和同位语时，这个句子就叫做主语从句、或宾语从句、或表语从句、或同位语从句。
这些从句的统称为名词性从句。
名词性从句的功能相当于名词词组。
所以按其句法功能，名词性从句可分为主语从句、表语从句、宾语从句和同位语从句。
引导名词性从句的有连接词that, whether 和if，关系代词who, whom, whose, what, which, whatever, whichever, whoever以及关系副词when, where和how。
任何一种从句都必须由一个引导词来引导。
引导名词性从句的引导词在语法上称为连接词。
而连接词又根据它们在句子中的不同作用又被划分为：连接词连接代词连接副词. 一、名词性从句的引导词有：连接词：that、if、whether连接代词：who/ whom/whose/what/which/wh_ever连接副词：when/where/why/how/二、各种连接词的用法：1.连接词that、whether、if 不在它们引导的主语从句中充当句子成分。
2. 连接代词who、whose、what、which等都在句子中担当一个句子成分。
比如：主语、宾语、表语、定语等等。
3. 关系副词when、where、how、why等分别在句子中作时间状语、地点状语、方式状语等等。
主语从句（The Subject Clause）作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。
that在句中无词义，只起连接作用；连接代词在从句中起名词的作用，在句中既保留自己的疑问含义、又起连接作用，作主语、宾语、表语、定语等；连接副词在从句中起副词的作用，作状语。
名词性从句全面讲解名词性从句是英语中的一种从属从句，它在句中充当名词的功能。
名词性从句可以在句子中作主语、宾语、表语和同位语等，并且可以由不同的引导词引导。
本文将全面讲解名词性从句的基本概念、用法及常见的引导词。
一、名词性从句的概念名词性从句是由一个词或一个词组引导的从句，它在句子中充当名词的角色。
名词性从句通常出现在复杂的句子中，起到连接主句和从句的作用。
名词性从句的引导词有很多种类，常见的有：that, whether, if, what, which, who, whom, whose, when, where, why等。
二、名词性从句的用法名词性从句可以在句子中作不同的成分，下面分别介绍其主要用法。
1. 名词性从句作主语名词性从句可以作为主语来引导句子，常用的引导词有：- That: That he is innocent surprises me.（他是无辜的让我吃惊。
）- Whether/If: Whether he will come or not is uncertain.（他是否会来还不确定。
）- What: What you said is true.（你说的是真的。
）2. 名词性从句作宾语名词性从句可以作为宾语来引导句子，常用的引导词有：- That: I know that he is a doctor.（我知道他是个医生。
）- Whether/If: I wonder whether/if it will rain tomorrow.（我想知道明天是否会下雨。
）- What: I don't understand what he is saying.（我不明白他在说什么。
）3. 名词性从句作表语名词性从句可以作为表语来引导句子，常用的引导词有：- That: The truth is that she is not happy.（事实是她不幸福。
）- Whether/If: The question is whether/if we should go or not.（问题是我们是否应该去。
名词性从句精讲精练(一)名词性从句相当于名词，可分别作主句的主语、表语、宾语和同位语。
因此，名词性从句分为主语从句、表语从句、宾语从句和同位从句。
一、引导名词性从句的连接词1、连词：that（无词义）, if, whether是否, as if好像：不充当从句成分, 只起连接作用。
2、连接代词：who, whose, whom, what, which：有词义，在从句中作主语、表语、宾语、或定语。
3．连接副词：when, where, why, how：有词义，在从句中作作状语。
若表示强调用：whoever, whatever, whichever, whenever, wherever 二、语序连接代词与连接副词在句中不再是疑问句，因而从句中谓语不用疑问式,即用陈述语序。
※1.根据句义，如果连接代词,连接副词和if、whether、as if都用不上时，才用that作连接词（that本身无任何含义）。
2.在主语从句、表语从句和同位从句中不用if引导；在主语从句和同位从句中引导词that不可省略，在表语从句中that有时可省略; 在宾语从句中可用if引导，that可以省略。
（一）主语从句在复合句作主语eg. 1. That he’ll come to the party makes us happy.2. Whether he’ll come is still uncertain.3. Who killed the old man is/remains a question.4. when they’ll start has not been decided yet.一般情况下，主语从句放在句首，此时主句谓语动词用单三形式。
但有时主语从句太长时，会有“头重脚轻”之感，因此常用it作形式主语，而把主语从句放到句子后面，此类句型有：1. It’s +adj/n+ that从eg. That you didn’t see the film last night is a pity.It’s a pity that you didn’t see the film last night.2. It’s said/reported+ that从eg. It’s said that three men were kill ed in the accident.3. It seems/happens(碰巧)+ that从eg. It seems strange that you don’t like money.（二）表语从句在复合句中作表语，位于系动词之后表语从句和主语指同一内容，它对主语进行解释说明，使主语的内容具体化。
名词性从句在复合句中起名词作用的从句叫名词从句 (Noun Clauses）。
名词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、同位语等，因此根据它在句中不同的语法功能，名词从句又包括：主语从句、宾语从句、表语从句和同位语从句。
名词性从句中一律用陈述语序。
辨别下列名词性从句的类别：1.How the book will sell depends on its author.2.John said that he was leaving for London on Wednesday.3.The fact is that he has not been seen recently.4.The fact that he has not been seen recently disturbs everyone in his office.5.He will talk to us about what he saw in England.6.It is impossible that I go and attend the meeting.引导名词性从句的连词：1. 连接词：that (无词义，在句中不充当任何成分)if / whether (有词义“是否”，但不充当任何成分)2. 连接代词：who, whom, whose, what, which,（有词义，在句中充当主语、表语、宾语或定语）3．连接副词：when, where, why, how, （有词义，在句中充当状语）一．主语从句主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而从句本身放在句子末尾。
1.主语从句位于主句谓语动词之前。
What matters most in learning English is enough practice.Where we shall have the meeting makes no difference.Whether the sports meeting will be held is not certain now.2.it 作形式主语代替主语从句，而真正的主语从句位于句末。
例如：It is a pity that you didn’t go to see the film.I t doesn’t interest me whether you succeed or not.3.主语从句谓语动词的单复数问题无论主语从句有多长，一般谓语动词用单数。
Where the English evening will be held has not yet been announced.What he wants to tell us is not clear.二．宾语从句宾语从句就是在复合句中作宾语的名词性从句，通常作谓语动词 (及物动词) 、介词、形容词的宾语。
1.作动词的宾语I heard (that) he joined the army.She did not know what had happened.I wonder whether you can change this note for me.She told me that she would accept my invitation.2.作介词的宾语Our success depends on how well we can cooperate(合作）with one another.You can give the book to whomever you like.3.作形容词(如sure,happy, glad, certain)的宾语I am afraid (that) I’ve made a mistake.I am sure (that) he will win the game.4. it 可以作为形式宾语it 不仅可以作为形式主语，还可以作为形式宾语而真正的宾语从句则放在句尾，特别是在带复合宾语的句子中。
例如：We thought it good news that the fog had finally gone.We find it necessary that we practice spoken-English every day.5. 否定前移若主句谓语动词为think, consider, suppose, believe, expect, 等，其后的宾语从句若含有否定意义，一般要把否定词转移到主句谓语上，从句谓语用肯定式。
例如：I don’t think the dress fits you well. 我认为这件衣服不适合你穿。
三．表语从句表语从句是在复合句中作表语的名词性从句，放在系动词之后，一般结构是“主语＋连系动词＋表语从句”。
可以接表语从句的连系动词有be, look, remain, seem等。
另外，常用的还有the reason is that… 和It is because 等结构。
1.表语从句位于系动词之后The reason why he is late for school is that he missed the early bus.But the fact remains that we are behind the other classes.The problem is whether the book will be published.2. as if, as though ,because 也可以引导表语从句。
It looks as if it is going to rain.It is because my car broke down on my way home.3.主语是advisem suggestion, order 等表示建议，要求，命令等的名词时，表语从句的谓语要用虚拟语气：(should) +动词原形，should 可省略。
He gave me a suggestion that I ( should )be calm now.四．同位语从句1.同位语从句的功能同位语从句就是在复合句中作名词的同位语的名词性从句。
同位语从句对于它前面的名词进一步解释，说明名词的具体内容，一般跟在fact,news,idea,truth,hope,problem, information, belief,thought, doubt,promise,question等抽象名词之后。
The news that we won the game is exciting.I have no idea when he will come back home.2.同位语在句子中的位置当主句的谓语动词较短，而同位语从句较长时，同位语从句常常后置。
He got the news from Mary that the sports meeting was put off.3.同位语从句和定语从句的区别：引导定语从句时，that作为关系代词，它在从句中必须充当句子成分，在从句中作宾语时可以省略；that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。
试比较下面两个例句:The news that our football team won the natch was encouraging.（that引导同位语从句，从句不缺任何成分，不能省略）The news that we heard on the radio was not true.（that引导定语从句，作宾语，可以省略）一、划出下列各句含有的名词性从句，并指出是名词性从句中的哪一种：1.What he wants is a book.2.It is so nice that we can learn this grammar point together.3.I’m so glad that I can make friends with you.4.This is why he did it.5.Do you agree to the suggestion that we (should) have a trip in Tibet?6.That he wants a book is certain.7.I suggested just now we (should) take part in this activity.8.Whether you like him or not doesn’t matter too much.9.He doesn’t know whether you can sing it well.10.The problem is whether you can sing it well.11.The problem whether it is right or wrong has not been decided.12.Please tell me who your monitor is.二．辨别下列从句是定语从句还是名词性从句1.We heard the news that our team had won.2.We must face the fact that we had spent all our money.3. The news that he told me yesterday was false.4. I have no doubt that he will come soon.5. The fact is that we have spent all our money.五．名词性从句的几个重难点1. that 和what，which 的区别：that 和 what 都可引导所有的名词从句。
但是，what除起连接作用外，还在名词性从句中充当成分，可在从句中做主语、宾语、定语或表语，表示疑问“什么”或者表示“…的人，/地方/东西”。
而that 在名词性从句中只起连接作用，不充当任何成分，无意义。
which在从句中也可以做主语、宾语、定语或表语，但指的是在某个特定范围中的哪一个，哪一些。
例：It is uncertain _____side effect the medicine will bring about, although about two thousand patients have taken it.A．that B．what C．how D．whether答案：B 考点：本题考查主语从句的引导词。
