名词性从句
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。
名词性从句完整版
注意事项：that在从句中不可省略的情况有：宾语从句中引导词that省略；主语从句中引导词that不可省略；表语从句中引导词that不可省略。
例子：I think (that) you are right. 宾语从句中引导词that省略。
虚拟语气的时态：与现在事实相反，从句和主句的时态均为一般过去时
虚拟语气的使用场合：在某些从句中，如条件状语从句、让步状语从句等
与过去事实相反的情况
虚拟语气的形式：与过去事实相反，从句使用“had+过去分词”，主句使用“would+have+过去分词”
虚拟语气的使用：表示与过去事实相反的假设情况，常用于表达遗憾、后悔等情感
例子：When he comes, we will have a party. (时间状语从句)
宾语从句
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特点：在句子中句叫做宾语从句。
种类：陈述句、一般疑问句、特殊疑问句和祈使句。
连接词：that、if、whether等。
汇报人：XX
感谢观看
虚拟语气的例子：If I had known the answer, I would have told you.（如果我早知道答案，我早就告诉你了。）
与真实情况的比较：与真实情况相比较，虚拟语气表达的是与过去事实相反的情况，而不是真实发生的情况
与将来事实相反的情况
虚拟语气的形式：与将来事实相反，从句使用“if+主语+were/did+动词原形”，主句使用“would+动词原形”
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名词性从句的特殊用法
从句中的省略现象
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
表语从句( the Predicative Clause ) The question is who can do the experiment. The reason for his lateness was that he got up late. China is no longer what she used to be.
连接词 ( Conjunctions )
that, whether/if（只用于宾语从句）, as if （只用于表语从句） 连接代词( Conjunctive pronouns )
who, which, what, whose(宾语从句)
连接副词( Conjunctive adverbs )
when, where, how, why
B (4) These photographs will show you ______. A. what does our village look like B. what our village looks like C. how does our village look like D. how our village looks like A (5) _____ he said at the meeting astonished everybody present. A. What B. That C. The fact D. The matter D for the violin. (6) He asked _____ A. did I pay how much B. I paid how much C. how much did I pay D. how much I paid
பைடு நூலகம்
主语从句( the Subject Clause ) Whether we will visit the Great Wall tomorrow has not been decided. That he will come is certain. It is certain that he will come. How this happened is still a question. What he said at the meeting is important.
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
名词性从句在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目，在历年的高考中几乎都涉及到，并且每年的命题各有变化。
一、名词性从句主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。
因此，这四种从句通称为名词性从句。
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, why1.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。
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。
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（2）It + be + 形容词+ that从句（3）It + be + 动词的过去分词+ that从句（4）It + 不及物动词+ that 从句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”常用的句型有：It is necessary (important, natural, strange, etc.) that …It is a pity (a shame, no wonder, etc.) that…It is suggested (requested, proposed, desired, etc.) that主语从句的例句：That he was won the prize is true.It is true that he has won the prize.What he said at the meeting is right,Whether he will come or not is unknown.Whoever comes will be welcome. Why he did it is not quite clear.2. 宾语从句名词句用作宾语的从句叫宾语从句。
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但事实仍然是我们落在其他班级后面
that
不省略
3. The question is whether we can finish the experiment by Friday.
介词后的宾语从句要用whether引导。whether 可与不定式连用。
doubt问题
肯定句: if / whether
否定句: that
疑定句: that
1. I doubt if / whether is telling the truth. _________he
2. We never doubt _________ the plan will be carried out . that that 3. Does he doubt _________ you are from Austria? 4. I’m doubtful _________ he will agree to this. if / whether 宾语从句经常做介词的宾语 1. The Swede stood still, except _____ his lips moved slightly. that what 2. She is not satisfied with ____ she has achieved. 3. He wrote a letter of thanks to whoever helped him. (任何一个) ______
表语从句
从句引导词:同主语从句 , 及as if /as though/because
可以接表语从句的连系动词有be, look, remain, seem等 1. The truth is that he has never been to the countryside.
实际情况是他从未去过农村.
注 意：
“if” 不能引导主语从句，应由“whether”引导。
引导主语从句的 “that” 不充当成分，不能省略。
主语从句太长时，常用it作形式主语以平衡句子。
“what”引导主语从句时在从句中充当主语、宾语、表语；
谓语动词：1）常与其后的名词一致 2）根据句子语境而定。
1. What you left are only several old books. 2. What concerns me is our lack of preparation for it. 3. What he says and does doesn’t concern me. 4. What he says and does don’t agree.
A If B Whether C That D Where 3.___ is known to us all is that America is a developed country____the First World.
A. Which; belong to
B. As, belonged to
6. It is no wonder that…(难怪) …
● It happened that they had had their military training.
1. ___ he made an important speech at the meeting was true. A. That B. Why C. What D. How 2. ___we’ll go camping tomorrow depends on the weather.
Where will all these advanced technology lead us ?
I can’t imagine….
Object Clause
I can’t imagine where all these advanced technologies will lead us.
He has not been seen recently The fact…disturbs everyone in his office.
3. I find necessary that this should be be kept secret for the time being it necessary that this should kept secret for the time being
4. Can you doubt if she will succeed? ? that she will succeed 5. I worried about if my brotherbrother will in time. time. whether my will return return in 6. She said that she had never told a lie. has 7. That our football team won the match last Sunday excited of us. us Our football team won the match last Sunday excited all all of seemed 8. ItIt looked that he was well prepared for the unexpected challenge. 9. What he said moved everyone present. That
1. That he suddenly fell ill last week made us surprised. (上星 期他突然生病) (fall) 2. What surprised me was to see him here .(令我惊讶的)(surprise) 3. When he will come is unknown .(他什么时候来) 4. Whether he is coming doesn’t matter much.(他是否来) 5. It remains a secret how they climbed up the mountain. (这仍然是个秘密)(remain) 6. Whoever walks around in such a heavy rain will catch a cold.(任何在这样大雨中行走的人)
Appositive Clause
The fact that he has not been seen recently disturbs everyone in his office.
主语从句 宾语从句 表语从句 同位语从句 从句一律保持陈述语序。
主语从句
从 句 that whether who whom whose what which 引导词 whoever whatever how when where why
用形式主语 it 的主语从句常见结构 1. It is clear (necessary, important, possible,remarkable that… 很清楚（必要, 重要,可能, 值得注意等)… 2. It is a fact (a pity, a good thing, good news…) that … 事实是 ( 可惜的是,好事是,好消息是)… 3. It is well-known ( reported, recorded, estimated,said, believed) that…众所周知( 据报道,据记载,据说,据估计) 4. It turns out ( seems, happens, appears…) that… 结果 是 ( 似乎是, 碰巧是, 好象是…)… 5. It has been found (has been proved,can be seen,must be pointed out) that …已发现( 已证明,可看出,需指出)…
Please let me know whether you want to go. 用if 会引起误解，就要用whether。
I don’t know whether or not the report is true. I don’t know whether/ifthe report is true or not. 宾语从句中的whether 与or not直接连用，就不能 换成if；不直接连用，可换。 It depends on whether we have enough time. They don’t knowwhether to go there.
C. What; belonging to D. It; belonging to
4. It’s known to us all ___ a form of energy .
A. water is
C. is water
B. that water is
D. that water to
5. It worried her a bit ___her hair was turning
The problem is …
When will man be able to live on Mars?
Predicative Clause
The problem is how we should use modern technology.
Subject Clause ….is unknown to us all. When man will be able to live on Mars is unknown to us all.
that 从句只跟在 except, but, in ,besides, 等介词后面
correction
1. The emperor was pleased by which the minister told him about it. what 2. Are you sorry for that you have annoyed him?