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名词性从句复习注意：1.在名词性从句中，连接词的选择要根据从句的句意和上下文来确定。
2.当从句是陈述句时，通常使用连接词that（可省略，但在正式文体中建议保留）；当从句是疑问句时，通常使用whether/if（表示选择或疑问）或连接代词/副词（表示具体的疑问内容）。
3.在宾语从句中，当从句是特殊疑问句时，其语序要调整为陈述句语序。
4.同位语从句与定语从句的区别在于：同位语从句是对前面名词或代词的具体内容的阐述或解释，而定语从句则是对前面名词或代词的修饰和限定。
一、主语从句定义：在句子中充当主语成分的从句。
引导词：that, whether, if, who, whom, which, what, whose, how, when, where等。
使用原则：主语从句通常位于句首，用于描述句子的主要动作或状态的执行者或承受者。
它可以是陈述句、疑问句或祈使句（但祈使句作为主语从句的情况较少见）。
构成：主语从句通常由连接词that（可省略，但当从句中有疑问词或表示否定、强调等意义的词时，通常不省略）或whether/if（表示选择或疑问）引导，后面跟完整的句子结构。
例句：1.What he said made me think deeply.2.Whether he will come or not is still a mystery.3.How we can solve the problem is our main concern.4.That the earth moves around the sun is a well-known fact.5.Whoever breaks the law should be punished.练习题1._____ he said at the meeting surprised us all.A. WhatB. ThatC. HowD. Why2._____ you do, do it with all your heart.A. WhateverB. WheneverC. WhereverD. However3.It is _____ he often fails in exams that makes his parents worried.A. whatB. becauseC. thatD. why4._____ is known to all, the moon travels around the earth.A. AsB. WhichC. ThatD. What5._____ we should do next is still under discussion.A. WhatB. HowC. WhetherD. When答案：AAC（强调句结构）AA二、宾语从句定义：在句子中充当宾语成分的从句。
(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。
高三语法复习第4讲名词性从句名词性从句：主语从句，宾语从句，表语从句，同位语从句名词性从句的引导词可分为引导词1：who,whom, which,what, whatever,whoever,whomever,引导词2：that/ whether ,when, where,why,whose,whenever,wherever,how，however做题方法:首先通过从句所在的未知判断是名词性从句其次分析从句的成分从句中缺主宾表的情况，选择引导词1中的词从句中缺状语或定语，选择引导词2最后，翻译句子，判断逻辑关系引导词的用法1.What引导名词性从句时，要做主语，宾语，表语，要有实际的意义（什么）同样的用法有who，whom,2.that引导名词性从句时，在从句中不充当成分，不可省略，起连接句子的作用3.when，where,why 在从句中充当状语4.whether 的意思是：“是否”，可引导主语从句，不可以换成if 01.主语从句1）从句在主语的位置，也就是从句做主语即为主语从句Eg1. what made me so happy is the good news I received about herEg2.That he wins the first prize in the competition mad me so delighted . Eg3.where I will go hasn’t been decided .Eg4.whether I accept your invitation is up to you.It 做形式主语，真正的主语是从句，常见的句型有It is+ adj(necessary ,important,essential,natural,strange ) that...It is +n(a pity, shame, no wonder) that......It is said /reported/ believed......It seems /appears/matters that.......02宾语从句（在谓语动词后/介词后，一个句子作宾语）Eg1.I didn’t know what he was talking about .Eg2.I always wonder how close the relationship between them.Eg3.I am glad to know that he came back safe and sound .It 做形式宾语主语+ find、make,feel，consider，see to，depend onEg I find it important that we should respect the old people.03表语从句（be动词和系动词之后用句子做表语）Eg1. That is what I want to tell you .Eg2.what confused me is that he should break up with herEg3.By boat is the only way to get here, which is how we arrived.常见的表语从句句型(1)It seems/appears that...(2)This/That is because/why/where/when/how...(3)The question/problem is whether/when/where/how...(4)The suggestion/advice/purpose/aim/goal/dream is that...(5)What从句+be+ that从句例如:What annoyed me most was that he came late again.04同位语从句1）同位语从句的结构：表示内容的先行词+引导词+从句2）同位语从句是对先行词的解释说明3）同位语从句的先行词一般是包含一定内容的抽象名词，如；suggestion、advice、proposal、thought、doubt、belief、news、promise、word、notice、request、requirement，problemEg1. He made a promise to me that he won’t be late for the class once again.4）同位语从句和定语从句的区别定语从句对先行词是起修饰作用，做出限定同位语从句对先行词是解释说明that的用法不同，在定语从句中that是关系代词在从句中做主语宾语表语在同位语从句中，that在从句中不做任何成分Here comes the news that he is admitted to the university.(同位语从句) Here comes the news that I am looking forward to .（定语从句）05wh-ever引导的名词性从句（无论....）1）引导词1：whatever/ whoever/ whomever/whichever（无论哪一个）在从句中做主宾表成分引导词2：whenever/ wherever/however在从句中做状语I can do whatever I want to doWhoever comes to English class late will sing a song for other students2）Wh-ever =no matter wh-Wh-ever 结构可以引导状语从句和名词性从句No matter wh-只能引导状语从句3）wh-和wh-ever 的区别wh-ever 译为无论.....，没有范围和条件wh-指特定的人，事情，地点等Eg1. Who is the next one to answer the question?Whoever answers the question can get a candy .Exercise 11.(2024·天津河西区模拟)_______ I’m concerned about most is_______we can collect a huge amount of money in such a short time. A.That; how B.What; if C.What; how D.As; whether【解析】选C。
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。
一．概念：名词性从句就相当于一个名词（因为名词可以充当主语，宾语和表语，所以名词性从句包含主语从句，宾语从句和表语从句和同位语从句）二．名词性从句主语从句That she is beautiful is a fact.主语从句系定表宾语从句We know that she is beautiful.主谓宾语从句表语从句 Our opinion is that she is beautiful.主系表语从句同位语从句The opinion that she is beautiful is a fact.主同位语从句系定表三．名词性从句的格式 1. that+陈述句=名词宾1.结构：主语 + 谓语2.语序：陈述句语序3.连接词 :①由that 引导②由if /whether 引导know if / whether Hua likes fish.③由特殊疑问词引导，表示特殊疑问意义 I want to know what time it is now.4.时态①当主句是一般现在时，从句根据情况使用任何时态。
（即：主现从不限）I don’t know (that) she is singing now.②当主句是一般过去时，从句应使用过去某时态(一般过去时,过去进行时，过去将来时，过去完成时)。
He said (that) he was at home. 他说他在家里。
③主句使用一般过去时，但从句表示的是客观真理、自然现象时、从句仍用一般现在时。
The teacher told us light travels faster than sound.一、一般结构：主语+连系动词+表语从句，二、可以接表语从句的词有：①be(being, been, am ,is, are, was, were)（be动词）② feel,look,sound, taste, smell (感官动词）③ stand, lie,remain, keep, stay(保持动词）④bee, get, grow, turn ,go ,prove(变化动词）⑤ seem, appear(表象动词)三、公式：a.由连接词that（无意义）, whether（是否）引导的表语从句这时主句的主语常常是抽象名词，如problem, result, chance, suggestion, question, reason 等，表语从句对主句主语进行说明，解释等。
选择性必修二Unit2重点语法：名词性从句总复习复习名词性从句【基础知识讲解】（1）高频考点：what，that用法区别;各连接词的用法（2）需掌握知识点1.名词性从句的定义，分类;2.连接词的辨别，用法;3.从句语序;4.时态（3）做题思路1. 判断是否为名词性从句2. 看从句缺不缺主干成分缺，用连接代词；不缺，用连接副词或连接词；翻译看意思（4）易错点1.强调句和主语从句的区别: 强调句去掉it is/was…… that/who句子仍完整，主从去掉后不完整2.定语从句和同位语从句区别需掌握知识点:1.定义：主、宾、表、同位语从句2.名词性从句和其他从句的区别：从句在主句中做主语，宾语，表语，同位语，分别对应主语从句，宾语从句，表语从句，同位语从句。
3.连接词1). 从属连词：that, whether/if that：无词义，在宾从中可省（在从句中不做成分）区别：whether/if：有词义：是否例句I think (that) you are right.I don’t know whether (≠ if ) or not I should take his advice .They asked whether (= if ) we need any help.What he wants to tell us is not clear.Who will win the match is still unknown.以及：whoever, whomever, whichever, whateverwhere：哪里3). 连接副词：why：为什么（有词义，在从句how：怎么样中作状语，具体选when：什么时候择按意思）例句It is known to us how he became a writer.Where the English evening will be held has not yet been announced.以及：wherever, however, whenever注意事项：1. what，that区分：what在从句中可做主语，宾语，表语，有两个意思：东西，什么；而that在从句中不做任何成分，也没有任何意思。
高考英语名词性从句语法知识点讲解主语从句宾语从句表语从句同位语从句作及物动词宾语作介词宾语that一般不省略可以省略一般不省略一般不省略一般不省略Whether/if(是否)放于句首时只用whether用whether/if均可，但有区别只用whether只用whether只用whether特殊疑问词注意语序要用陈述语序名词性关系从句注意语序要用陈述语序一、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,certai n,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。
