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名词性从句知识点(大全)一、初中英语名词性从句1． is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. Which【答案】 B【解析】【分析】句意：众所周知地球比太阳小。
is known to all 是主语从句，从句中缺少主语，因此用what，选B。
【点评】考查名词性从句，本题涉及what引导的主语从句。
2．While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others.A. it; thatB. what; thatC. that; whatD. which; that【答案】 C【解析】【分析】句意：虽然有些行为对你来说可能很奇怪，但请记住，你认为正常的行为对别人来说可能也不寻常。
第一空为宾语从句，从句结构完整用that起连接作用，第二空为主语从句，从句中consider缺少宾语，应该用what，故选C。
【点评】考查名词性从句，本题涉及that引导的宾语从句和what引导的主语从句。
3．It has been pointed out ________ plays a vital role in driving away one's anxiety is one's sweet childhood memories.A. what thatB. whichC. thatD. that what【答案】 D【解析】【分析】句意：有人指出，驱除焦虑所起着至关重要的作用是童年美好的回忆。
本句时一个主语从句，it作形式主语，真正的主语为that what plays a vital role in driving away one's anxiety is one's sweet childhood memories.，主语从句中又有一个主语从句，且此主语从句中缺少主语，所以用what引导。
(完整版)名词性从句知识点总结名词性从句知识点总结名词性从句是指在复合句中充当名词的从句。
它可以在句子中充当主语、宾语、表语或同位语。
以下是名词性从句的几个重要知识点：主语从句主语从句在句子中充当主语的角色。
它引导的从句通常由关联词that引导，但有时可以省略。
例如：- That he stole the money is a fact.宾语从句宾语从句在句子中充当宾语的角色。
它通常由关联词that引导，但也可以由其他关联词如whether, if, who, whom等引导。
例如：- She asked me if I had finished my homework.if I had finished my homework.- I wonder whether he will pass the exam.whether he will pass the exam.表语从句表语从句在句子中充当表语的角色。
表语从句通常由关联词that引导，但有时也可以由其他关联词如whether, if, what等引导。
例如：- His biggest concern is that he might lose his job.that he might lose his job.- The question is what we should do next.what we should do next.同位语从句同位语从句在句子中充当同位语的角色，用来解释或说明名词的具体内容。
同位语从句通常由关联词that引导，但也可以由其他关联词如whether, if等引导。
例如：- The fact that he lied to us is very disappointing.that he lied to us is very disappointing.- My hope is that we can find a solution to the problem.that we can find a solution to the problem.以上是名词性从句的一些常见知识点总结。
名词性从句知识点在英语语法中，名词性从句是一个重要且复杂的部分。
它在句子中起着名词的作用，包括主语从句、宾语从句、表语从句和同位语从句。
接下来，让我们逐一深入了解。
一、主语从句主语从句即在句子中充当主语的从句。
例如，“What he said is true”（他说的是真的。
）在这个句子中，“What he said”就是主语从句。
引导主语从句的连接词主要有三类：1、从属连词：that、whetherThat he will come is certain （他会来是肯定的。
）这里的“that”在从句中不充当成分，只起引导作用。
Whether she will go there is not decided （她是否会去那里还没决定。
）“whether”表示“是否”。
2、连接代词：what、who、which、whose、whatever、whichever、whoever 等What you need is more practice （你需要的是更多的练习。
）“what”在从句中充当宾语。
3、连接副词：when、where、why、how 等When the meeting will be held has not been announced （会议何时举行还未宣布。
）需要注意的是，主语从句后置时，常用 it 作形式主语，而将真正的主语从句放在后面。
例如：It is unknown whether he will come （他是否会来还不知道。
）二、宾语从句宾语从句在句中充当宾语。
比如，“I know that he is a student”（我知道他是个学生。
）“that he is a student”就是宾语从句。
引导宾语从句的连接词与主语从句类似：1、从属连词：that（在口语或非正式文体中常省略）、whether、ifHe said （that) he was busyI wonder if/whether he will come2、连接代词：what、who、which、whose、whatever、whichever、whoever 等She asked me what I was doing3、连接副词：when、where、why、how 等Could you tell me how I can get there?宾语从句的时态要根据主句的时态来变化。
高考英语名词性从句知识点一、that 从句1、主语从句（1）that 从句作主语时，常用it 作形式主语，常见的句型有：It+be+形容词（obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.）+ that从句It+be+名词词组（no wonder, an honor, a good thing, a pity, no surprise, etc.）+ that 从句It+be+过去分词（said, reported, thought, expected, decided, announced, arranged, etc.）+ that 从句（2）that可以省略，但 that 从句位于句首时，that不能省略。
2、宾语从句（1）常见的可以接 that 从句作宾语的动词有see, say, know, imagine, discover, believe, tell, show, think, consider, be sure, be afraid等。
在可以接复合宾语的动词之后，如 think, make, consider等，可以用 it 作形式宾语。
（2）That 从句一般不能充当介词宾语，偶尔可作except, in 的宾语。
3、表语从句（that不可省略）4、同位语从句连词that引导同位语从句时，应在某些抽象名词之后，如：fact, hope, desire, thought, suggestion, idea, news, problem, possibility 等，对前面的名词起补充说明的作用，that在从句中不担当任何成分，不能省略。
二、whether/if从句1、在表语从句和同位语从句中，只能用 whether 不能用 if；当主语从句放于句首时，只能用 whether 不用 if；当 it 作形式主语，主语从句放在句末时用 whether或if均可；discuss 后引导宾语从句时，必须用whether。
复合句中具有名词性质并且可以做主语、表语、同位语或宾语的从句叫名词性从句。
因此，我们把主语从句、表语从句、同位语从句和宾语从句这四种从句统称为名词性从句。
高考热点1）怎样判断名词性从句的类别；2）连词that 和what的用法与选择3）if 与whether的区别4）同位语从句与定语从句的区别5）名词性从句必须采用的陈述语序6）it 可充当形式主语和形式宾语7）疑问词+-ever的连词和不加-ever的连词在语义上的用法和差别核心解读一1、在名词性从句中，从句都用陈述语序。
2、引导名词性从句的词叫引导词。
引导词可以分为以下几类：1）从属连词that（用于表示肯定的含义）, whether, if (表示疑问)，这三个词只起连接作用，不充当从句中的任何成分，除宾语从句外（that可省）,这些词均不可省略。
2）连接代词有who, whom, whose, what, which, whoever, whatever, whichever等。
这些词在从句中既起连接作用，又充当从句中的成分，如主语、宾语、表语、补语，且不可省略。
3）连接副词有when, where, why, how, wherever, however等。
它们既起连词作用，本身又做从句中的状语。
3、名词性从句中的时态一致问题1）在宾语从句中，当主句是一般现在时、将来时或现在完成时，起从句的谓语根据需要用适当的时态。
当主句是一般过去时，从句用过去的某个时态，但若宾语从句表示客观真理，格言，谚语等，从句的时态仍用一般现在时。
Have you told him that when we are to leave?Teacher told us that China lies in the west of Japan.Although she was listening, she didn’t hear what he was saying because t here was so much noise.2）在主语从句、表语从句或同位语从句中，应注意主语从句中的谓语动词的时态一致性及动作发生的先后关系。
名词性从句英语语法知识点汇总名词性从句是在句子中起名词作用的句子。
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。
下面就是小编给大家带来的名词性从句英语语法知识点汇总，希望大家喜欢！引导名词性从句的连接词可分为三类：连接词：that,whether,if 不充当从句的任何成分)连接代词：what, whatever, who, whoever, whom,whose, which.连接副词：when, where, how, why不可省略的连词：1. 介词后的连词2. 引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy.We heard the news that our team had won.比较：whether 与 if 均为"是否"的意思。
但在下列情况下，whether 不能被 if 取代：1. whether 引导主语从句并在句首2. 引导表语从句3. whether 从句作介词宾语4. 从句后有"or not"Whether he will come is not clear.大部分连接词引导的主语从句都可以置于句末，用 it 充当形式主语。
It is not important who will go.It is still unknown which team will win the match.1)由从属连词 that 引导的从句叫做名词性 that-从句。
That 只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。
名词性 that- 从句在句中能充当主语、宾语、表语、同位语和形容词宾语，例如：主语：That he is still alive is sheer luck. 他还活着全靠运气。
宾语：John said that he was leaving for London on Wednesday. 约翰说他星期三要到伦敦去。
名词性从句知识点总结名词性从句是指在一个句子中扮演名词的角色，作为主语、宾语、表语等成分的从句。
在英语语法中，名词性从句是一个重要的语法结构，掌握好名词性从句的知识点对于提高英语语言水平和理解复杂句子非常有帮助。
本文将对名词性从句的几个主要知识点进行总结。
1. 定义和特点名词性从句是一种从句类型，它在句子中充当名词的角色，可以作为主语、宾语、表语等。
名词性从句通常由连接词引导，如that、whether、if、who、whom、whose、which等。
2. 主语从句主语从句在句子中作为主语，常用连接词that引导。
例如：That heis late is a common problem.（他迟到是个常见问题。
）3. 宾语从句宾语从句在句子中作为动词的宾语，通常由连接词that、whether、if引导。
例如：She asked me if I could help her.（她问我是否能帮她。
）4. 表语从句表语从句在句子中作为表语，常用连接词that引导。
例如：The important thing is that you are safe.（重要的是你安全。
）5. 同位语从句同位语从句在句子中作为对某个名词或代词的解释或说明，通常由连接词that引导。
例如：The fact that she passed the exam is a relief.（她通过考试的事实令人松了一口气。
）6. 后置定语从句后置定语从句在句子中作为对名词或代词的修饰，通常由关系代词引导。
例如：The book that she recommended is very interesting.（她推荐的那本书非常有趣。
）7. 时间状语从句时间状语从句在句子中作为一个时间状语来修饰动词，常用连接词when、while、as、before、after等引导。
例如：He arrived home before it got dark.（在天黑之前他回到了家。
名词性从句一.概念名词性从句共有四种:1.主语从句 2.表语从句3.宾语从句 4.同位语从句二.知识点1.主语从句：主语从句在整个句子中作主语。
(1)主语从句中的that不充当句子的成分，只是单纯的连接词，通常不省略。
分句置于句首时，that绝对不可以省略。
That the driver could not control his war was obvious.It was obvious that the driver could not control his car.2.表语从句：表语从句出现在系动词后，充当表语。
The trouble is that we are short of money.Go and get your coat. It’s where you left it.引导表语从句除了上述三类词外还有because, as if/ as though等等The reason (why/for which…..) is that ……It/This/That is because……连系动词“appear, look, seem”的两个常用句型It seems/appears that….It looks/seems as if/as though……(与事实相符用陈述语气，与事实相反用虚拟语气) 3. 宾语从句：（that可以省略）及物动词，形容词和介词后加宾语从句作其宾语。
宾语从句时态与主句相呼应，但宾语从句表示的是客观真理或普遍现象除外The teacher told us (that) the earth moves around the sunI am afraid (that) I have made a mistake.He will have to pay for what he has done.当宾语从句后带宾补时，要用“主语+谓语+it +宾补+that+从句, that不可省略I think it certain that she will do well in her exam.that在宾语从句常可以省略，但由and或 but连接两个或多个宾语从句时，仅可以省略第一个连词thatHe said (that) he had eaten nothing and that he w asn’t hungry.注意区别if引导的宾语从句和条件状语从句I don’t know if he will come. （if是否）If he comes, I’ll let you know. （if 如果）4.同位语从句：（that不可省略）对前面的名词进一步说明。
名词性从句知识点总结一、名词性从句作主语名词性从句可以作为主语，通常由关系代词引导，包括 that, who, whom, whose, which 等。
例如：1. What he said is true.（他说的是真的。
）2. Whoever comes late will be punished.（谁迟到谁受惩罚。
）二、名词性从句作宾语名词性从句可以作及物动词的宾语，常由连接词 that, if, whether 等引导。
例如：1. He said that he would come.（他说他会来。
）2. I don’t know whether she is coming.（我不知道她是否会来。
）三、名词性从句作表语名词性从句可以作表语，通常由连接词 that, whether, who 等引导。
例如：1. The problem is whether we should go.（问题是我们是否要去。
）2. My hope is that you can help me.（我的希望是你能帮助我。
）四、名词性从句作定语名词性从句可以作定语，通常由关系代词引导，包括 that, who, whom, whose, which 等。
例如：1. The book that I bought yesterday is very interesting.（我昨天买的书非常有趣。
）2. The girl who is standing there is my sister.（站在那里的女孩是我的妹妹。
）五、名词性从句作同位语名词性从句可以作同位语，通常由连接词 that 引导。
例如：1. The news that she has passed the exam is exciting.（她通过考试的消息让人兴奋。
）2. The fact that he is leaving surprises me.（他要走的事实让我感到惊讶。
GrammarChapter 1 名词性从句⼀.主语从句1.定义在复合句中充当主语成分的句⼦叫做主语从句。
2.⽤法1) 由连词that引导的主语从句，其中that⽆实际意义，起连接作⽤。
That he finished writing the composition in such a short time surprised us.主语谓语宾语That gold cannot be melted by fire is a truth.主语动词表语注意：为避免句⼦头重脚轻，常⽤it作形式主语，代替主从放句⾸，⽽把主从置句末。
It’s strange that he knows nothing about it.It is a pity that she has made such a mistake.It is said that President Jingo will visit our school next week.(1)It is +名词+主语从句It is good news that … ……是好消息It is a question that … ……是个问题It is common knowledge that … ……是常识类似的名词：a pity, a wonder, a good thing, no wonder, surpriseIt is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.(2)It is +形容词+主语从句It is necessary that … 有必要……It is clear that … 很清楚……It is likely that … 很可能……It is important that … 重要的是……类似的形容词还有：strange; natural; obvious; true; good; wonderful; possible; unlikely; quite unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.(3)It is +过去分词+主语从句It is said that … 据说……It is reported that … 据报道……It has been proved that … 已证明……类似的过去分词有：known; estimated; expected; believed; thought; hoped; noted; discussed; required; decided; suggested; demanded; made clear; found out, etc.2) 由疑问副词when, where, how, why引导的主语从句这类主语从句既可放在句⾸，又可以放在句⼦后⾯去，前⾯⽤it 作形式上的主语。
名词性从句在句子中起名词作用的句子叫名词从句(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、介词宾语等，因此根据它在句中不同的语法功能，名词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。
一、引导名词性从句的连接词引导名词性从句的连接词可分为三类：从属连词：that（无任何词意）；whether, if（均表示“是否”表明从句内容的不确定性）；as if ,as though（均表示“好像”，“似乎”）because。
以上在从句中均不充当任何成分连接代词：what, whatever, who, whoever, whom, whose, which. Whichever, whomever连接副词：when, where, how, why，whenever，whereever.名词性从句的分类1．主语从句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；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。
例如：What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。
Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。
It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。
Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行，还没有宣布。
【典例1】(2009·上海卷)It is not immediately clear ____ the financial crisis will soon be over.A.sinceB. whatC. whenD. Whether【答案】D【解析】考查主语从句的用法。
该句的意思时：经济危机是否会很快结束是很明显的事情。
“是否”用whether表示，不能选when是因为从句中由soon这一实践状语。
【典例2】(2008·山东卷)_____ was most important to her, she told me, was her family.A. ItB. ThisC. WhatD. As【答案】C【解析】she told me是插入语，可删除。
what引导主语从句，在从句中充当主语。
it 与this 不能引导主语从句。
有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。
主语从句后的谓语动词一般用单数形式。
常用句型如下：（1）It + be + 名词+ that从句It is our hope that the two sides will work towards peace.我们的希望是双方能朝着和平的方向发展。
（2）It + be + 形容词+ that从句It is obvious that you are made a big mistake.很明显你犯了一个大错误。
（3）It + be + 动词的过去分词+ that从句It is reported that no passengers were injured in the accident.据报道，事故中没有乘客受伤。
（4）It + 特殊动词+ that 从句It happened to me that i had been away when he called.他打电话时我刚好不在家。
另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，通常should可省略。
常用的句型有：1、It is necessary (important, natural, strange, surprising，unthinkable，unbelievable，incredible）+ that 从句2、It is a pity (a shame, no wonder, etc.) that…3、It is suggested (requested, proposed, desired, advised，ordered，required，insisted，demanded）+that 从句It is suggested that you (should) spend more time in studying English.【典例】(2009·天津卷)It is obvious to the students ______ they should get well prepared for their future.A. asB. whichC. whetherD. that【答案】D【解析】考查名词性从句。
本空格处应是一个主语从句的引导词，因该主语从句不缺成分，且句意完整，故应用不作任何成分的连词that。
2．宾语从句名词句用作宾语的从句叫宾语从句。
引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。
（1）由连接词that引导的宾语从句由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。
例如：He has told me （that）he will go to Shanghai tomorrow. 他已经告诉我他明天要去上海。
I think（that）it will clear up this afternoon and that they will come to say goodbye to us.注意：在demand，order，suggest，decide，insist，desire，request，command等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“（should）+ 动词原形”。
例如：I insist that she (should) do her work alone. 我坚持要她自己工作。
The commander ordered that troops (should) set off at once. 司令员命令部队马上出发。
（2）用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever 等关联词引导的宾语从句相当于特殊疑问句，应注意句子语序要用陈述语序。
例如：I want to know what he has told you. 我想知道他告诉了你什么。
She always thinks of how she can work well. 她总是在想怎样能把工作做好。
She will give whoever needs help a warm support. 凡需要帮助的人，她都会给予热情的支持。
【典例1】(2008·北京卷)The companies are working together to create _______ they hope will be the best means of transport in the 21st century.A. whichB. thatC. whatD. who【答案】C【解析】create后为宾语从句，从句中they hope是插入语，可删除。
因为从句中缺少主语，所以用what引导该从句。
【典例2】(2009·全国卷Ⅰ) Could I speak to is in charge of International Sales please?A. whoB. whatC. whoeverD. whatever答案】C【解析】考查名词性从句。
题干中介词to后面为宾语从句，从句中缺少主语，因此填whoever。
（3）、think, believe, imagine, suppose等等动词引起的否定性宾语从句中，要把上述主句中的动词变为否定式。
即将从句中的否定形式移到主句中。
例如：We don’t think you are here. 我们认为你不在这。
I don’t believe he will do so. 我相信他不会这样做。
（4）、动词feel,find,think,consider,make,believe,guess,suppose,assume等后有宾语补足语时，则需要用it作形式宾语，而将宾语从句后置。
I think it necessary that we take plenty of boiled water every day.我认为每天多喝开水是有必要的。
（5）、动词hate,like,take,owe,have,take for granted等表示“喜欢，痛恨，认为”的词或短语和see to (注意，留意）后不能直接跟宾语从句，需先用it作形式宾语，然后再接宾语从句。
I hate it when they taik with their mouth full of food.我讨厌他们满嘴食物时说话。
（4）、用that 引导的从句作介词宾语时，一般需要用形式宾语it代替，然后将that从句放在最后。
You may depend on it that I shall always help you.请你相信我会一直帮助你。
宾语从句中that不能省略的情况1、that引导的宾语从句和主句之间有插入语时I think，first of all，that we must believe in ourselves.2、宾语从句为主从复合句且其从句位于主句之前时。
He said that if he came back early，he could come for the meeting.3、当it作形式宾语，that引导的宾语从句后置时We have made it clear that we will learn to deal with various difficult problems.我们已经表明，我们将学会处理各种难题。
