名词性从句用法详解
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。
名词性从句的用法
名词性从句的用法名词性从句是在句子中充当名词的成分的从句。
名词性从句可以作为主语、宾语、表语或补语，常见的名词性从句有宾语从句、主语从句、表语从句和同位语从句。
1. 宾语从句（Object Clause）：宾语从句在主句中充当宾语的角色。
一般引导宾语从句的词包括that, whether, if, why, how, when, where, who, whom 等。
示例：I don't know where he lives.（我不知道他住在哪里。
）2. 主语从句（Subject Clause）：主语从句在句子中充当主语的角色。
常用的引导词有that, whether, if, what, who, which, where, how 等。
示例：What she said surprised me.（她说的话让我很惊讶。
）3. 表语从句（Predicate Nominative Clause）：表语从句在句子中充当表语的角色。
一般由连词that 或whether 引导，也可以由who, whom, whose, which 等引导。
示例：His dream is that he can become a famous singer.（他的梦想是成为一名著名的歌手。
）4. 同位语从句（Appositive Clause）：同位语从句用来解释、说明和限制先行词的意义。
它与先行词之间往往用连词that 或whether 连接。
示例：The news that he had won the prize made everyone happy.（他获奖的消息让大家都很高兴。
）。
名词性从句的用法和特殊引导词和名词性从句在句子中的位置和作用
名词性从句的用法和特殊引导词和名词性从句在句子中的位置和作用名词性从句的用法和特殊引导词以及名词性从句在句子中的位置和作用名词性从句是指在句子中充当名词的从句。
它可以作主语、宾语、表语、同位语等，在英语中被广泛应用。
本文将介绍名词性从句的用法以及特殊引导词，并探讨名词性从句在句子中的位置和作用。
一、名词性从句的用法名词性从句可以用来代替句子中的名词，并在句中担任特定的语法角色。
主要有以下几种用法：1. 主语从句：名词性从句作主语，位于主句的动词之前，如：- What you said is true.（你说的是真的。
）- Whether she will come is still unknown.（她是否会来仍然是未知的。
）2. 宾语从句：名词性从句作及物动词或介词后的宾语，如：- I don't know what to do.（我不知道该怎么办。
）- They asked me where I was going.（他们问我要去哪里。
）3. 表语从句：名词性从句作连系动词后的表语，如：- The most important thing is that you are safe.（最重要的是你平安。
）- My wish is that everyone can live a happy life.（我的愿望是每个人都能过上快乐的生活。
）4. 同位语从句：名词性从句作另一个名词的同位语，如：- The fact that he made a mistake surprised everyone.（他犯了一个错误这个事实令人惊讶。
）- Her belief that honesty is the best policy is well-known.（她认为诚实是最好的策略，这一观点很有名。
）二、特殊引导词名词性从句有一些特殊的引导词，根据从句的不同用法选择相应的引导词。
以下是常见的特殊引导词：1. 作主语从句的引导词：- that: He said that he would come.（他说他会来。
名词性从句解析
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。
名词性从句用法详解
I think it is because you are doing too much.我想这是因为你做得太多。
连接代词
what
which
who
whom
whose
什么
哪一
谁
谁
谁的
主语
表语
宾语
定语
宾补
The problem is who we can get to replace her.问题是我们能找到谁去替换她呢。
It’s a pity that we can’t go.很遗憾我们不能去。
It’s no surprise that our team should have won the game.我们没赢这场比赛真意外。
3）It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。
whoever
whatever
whichever
无论谁
无论什么
无论哪一
主语
表语
宾语
定语
宾补
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。
Eat whichever one you like and leave the others for whoever comes in late.喜欢吃哪一个就吃哪一个，把其余的留给进来迟的。
How this happened is not clear to anyone.这事怎样发生的，谁也不清楚。
英语名词性从句讲解【完整版】
2、I asked him if he could do me a favor .
If与whether的区别：
1、If不能引导放于句首的主语从句，而whether可以。 2、引导表语从句用whether，不用if。 3、引导同位语从句用whether，不用if。 4、whether可以引导从句作介词的宾语，不用if 。 5、whether or not 连在一起可以，但if不可以。而 “whether-----or not = if -----or not”
同位语从句：
定义：在复合句中充当同位语的句子。 同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和 同位语在逻辑上是主表关系。 同位语常见名词：fact, suggestion, advice, idea, decision, news, thought, hope, belief, truth, doubt, promise, possibility, truth, warning, message, reason, report, question，explanation, wish, problem等。 常见的连接词：that, whether, what, who, how, when, where等。 用法： The thought that I want to buy my mother a birthday gift makes me excited.that 引导的同位语从句，解释说明 thought，从句不缺成 分 There is some doubt whether he will come. whether 引导同位语从句，if 不能引导同位语从句 we haven’t made the decision where we are going to spend our vacation. 有时同位语从句可以不紧跟解释说明的名词后面。 The news is surprising that he won the match.
名词性从句的用法解析
名词性从句的用法解析名词性从句是英语语法中的一种特殊结构，它在句子中扮演名词的角色。
名词性从句可以作主语、宾语、表语和补语，它的引导词通常包括“that”、“whether/if”、“wh-”疑问词以及“whoever”、“whatever”、“whichever”等。
1. 名词性从句作主语名词性从句可以作整个句子的主语，常见的引导词是“that”和“whether/if”：例句1：That he is late again is a disappointment to me.例句2：Whether/if she will attend the meeting is still uncertain.2. 名词性从句作宾语名词性从句可以作及物动词或介词的宾语，常见的引导词有“that”、“whether/if”以及wh-疑问词：例句1：He doesn't know whether/if he should accept the job offer.例句2：I doubt that they will arrive on time.例句3：She is worried about what will happen tomorrow.3. 名词性从句作表语名词性从句可以作句子中的表语，常见的引导词有“that”、“whether/if”以及wh-疑问词：例句1：His main concern is that he won't have enough time to finishthe project.例句2：The question is whether/if she can handle the responsibility.4. 名词性从句作补语名词性从句可以作某些动词的表语补语，通常以“that”引导：例句1：She considered it necessary that he should apologize.例句2：He made it clear that he didn't want to participate in the discussion.需要注意的是，在名词性从句中，有时候可以省略连词或引导词，尤其是在口语中。
完整版)名词性从句用法归纳
完整版)名词性从句用法归纳名词性从句是指在句子中作名词角色的句子，可以充当主语、宾语、表语、同位语、介词宾语等。
名词性从句包括主语从句、宾语从句、表语从句和同位语从句。
引导名词性从句的连接词可以分为三类。
第一类是从属连词，包括that、whether和if。
在宾语从句或表语从句中，that 有时可以省略。
第二类是连接代词，包括what、who、which 等。
这些代词在从句中做成分，不可以省略。
第三类是连接副词，如when、where、how等，也不可以省略。
在一些情况下，that可以省略，如定语从句中做宾语、引导宾语从句或表语从句时。
但在定语从句中做主语、由that引导同位语从句时，以及宾语从句中真正的that不可以省略的情况下，that不能省略。
主语从句是指作句子主语的从句。
主语从句通常由从属连词that、whether等，连接代词what、who、which等，以及连接副词how、when、where等引导。
2、连接词的使用：连接词在句子中起到连接的作用，其中that在句子中没有实际的意义，只是起到连接从句和主句的作用。
而连接代词和连接副词则在句子中既保留了自己的疑问含义，又起到连接从句和主句的作用，同时在从句中充当从句的成分。
例如，whom和who指人，what指物，而XXX和whoever则表示泛指意义。
举个例子，What he wants to tell us is not clear.表示他想告诉我们什么并不清楚。
另外，为了避免句子头重脚轻的情况，有时我们会用形式主语it代替主语从句，并将主语从句放在句末。
这种情况下，主语从句后的谓语动词一般使用单数形式。
常用的句型有：（1）It + be +名词+ that从句，如It is a fact that（事实是）；（2）It + be +动词的过去分词+ that从句，如It is said that（据说）；（3）It +不及物动词（vi）+ that从句，如It seems that （似乎）；（4）It + be +形容词+ that从句，如It is naturalthat（很自然）。
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名词性从句用法先详解一、概说名词性从句，即指性质相当于名词的从句，它包括主语从句、宾语从句、表语从句和同位语从句。
从高考的考查的实际情况来看，名词性从句考得最多的是宾语从句，其次是主语从句，再次是表语从句，而同位语从句则很少考查。
二、名词性从句的一般引导词1. 连接词that 只起连接作用，没有任何意思，也不充当句子成分，在宾语从句中可省略，但引导其他名词性从句时通常不省略。
如：I hope (that) you enjoy your holiday. 希望你假期过得好。
That he likes you is very obvious. 很显然他喜欢你。
2. 连接词whether 也不充当句子成分，但有自己的意思，表示“是否”；引导宾语从句时，可换成if，但引导其他名词性从句时不能换成if。
He asked whether [if] I would show him the way. 他问我是否可以给他带路。
Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。
(引导主语从句，不能用if 代替whether)3. 连接代词who(m), whose, which, what 等，均有各自的意义，在从句中作主语、宾语、定语等。
如：That’s why she wanted to leave. 这就是她想离开的原因。
When we arrive doesn't matter. 什么时候到没有关系。
T ell me which one you likebest. 告诉我你最喜欢哪一个。
4. 连接副词when, where, why, how 等，也各自有自己的意义，在从句中作状语。
如：The question is how we should carry out the plan. 问题是怎样执行这个计划。
When she’ll be back depends much on the weather. 她什么时候回来在很大程度上要看天气。
Why he did it will remain a puzzle forever. 他为什么这样做将永远是一个谜。
三、名词性从句的重要引导词1. what 用于引导名词性从句是一个十分重要的引导词，它可引导主语从句、宾语从句和表语从句，但不用于引导同位语从句。
它引导的名词性从句有两个意思是：一是表示“什么”，带有疑问意味；二是表示“…所…的”，相当于一个先行词后接一个关系代词。
如：I don’t know what you want. 我不知道你想要什么。
I don’t know what you want is this. 我不知道你所想要的是这个。
2. what 引导名词性从句时可用作限定词，其后修饰名词。
如：I gave him what books I had. 我把我所有的书都给他了。
He gave me what money he had about him. 他把身边带有的钱全给了我。
注：what 后的名词可以是复数名词或不可数名词，但通常不能是单数可数名词，并且后接不可数名词时，有时可有little修饰，两者的区别是：what+不可数名词=所有的都，what little+不可数名词=虽少但全部。
如：What friends she has are out of the country. 她有的那些朋友全在国外。
We gave him what (little) help we could. 我们给了他我们力所能及的帮助。
3. whoever, whatever, whichever 等也可引导名词性从句，其意分别为“所…的一切事或东西”、“任何…的人”、““…的任可人或物”等。
如：Whoever wants the book may have it. 任何人要这书都可拿去。
I’ll do whatever I can do to help him. 我们将尽我们所能来挽救他。
Buy whichever is cheapest. 买最便宜的。
注意以下受汉语意思影响而弄错的句子：任何人来都欢迎。
误：Who comes will be welcome. / Anyone comes will be welcome.正：Whoever comes will be welcome. / Anyone who comes will be welcome.另外，它们也可引导让步状语从句，其意为“无论…”、“不管…”，其意相当于no matter who [what, which]。
如：Whatever happens, you must be calm. 不管发生什么情况，你都必须镇静。
(whatever = no matter what)He won't eat you, whoever he is. 不管他是谁，他也不能把你吃掉。
(whoever = no matter who)注：whoever 既用作主格也用作宾语；作宾语时不宜用whomever，因为在现代英语中whomever 这个已几乎废弃不用。
4. why 与because 的用法区别。
两者均可引导表语从句，但前者强调结果，后者强调的原因。
如：I had a cold. That’s why I didn't come. 我感冒了，因此我没来。
I didn’t come. That’s because I had a cold. 我没有来，那是因为我感冒了。
五、名词性从句的语序名词性从句的词序与陈述句语序相同，尤其注意那些由连接代词who(m), whose, which, what 和连接副词when, where, why 等引导的名词性从句，不要受它们在特殊疑问句中用法的影响而误用疑问句词序。
如：Why was she crying? 她为什么在哭？I don’t know why she was crying. 我不知道她为什么哭。
六、名词性从句的时态问题1. 当主句的谓语动词是过去式时，宾语从句若不是一个客观事实或真理，其谓语动词也必须用某种过去时态。
如：She said that she didn't want to know. 她说她不想知道。
I asked her whether she would agree. 我问她是否会同意。
2. when, if 这两个词既可引导名词性从句，也可引导状语从句。
当它们引导名词性从句且表示将来意义时，要直接使用将来时态；但当它们引导状语从句且表示将来意义时，则必须用一般现在时表示将来意义。
如：I d on’t know when he will come, but when he comes, I’ll call you. 我不知道他什么时候，但当他来的时候，我会打电话给你。
句中第一个when 引导的是宾语从句，故用将来时态表示将来意义；第二个when 引导的是时间状语从句，故用一般现在时表示将来意义。
英语名词性从句练习与解析：1．My mind wasn’t on what he was saying so I’m afraid I _____half of it.A. was missingB. had missedC. will missD. missed2 Y ou are saying that everyone should be equal, and this is ______I disagree.A why B. whereC. whatD. how3 I think father would like to know _____ I’ve been up to so far, so I decided to send him a quick note.A. whichB. whyC. whatD. how4 Parents are taught to understand ______important education is to their children’s future.A. thatB. howC. suchD. so5 –T om was Jane’s brother.--_____he reminded me so much of Jane.A. No doubtB. About allC. No wonder D Of course6 I’ve learnt _____, no matter what happens and how bad _____seems today, life goes onand it will be better tomorrow A. it; that B. that; itC. it; itD. that; that7 –It’s wrong for a student to follow _____his teachers say.--It’s true. I can’t agree more A. what B. no matter whatC. howeverD. whatever8 The reason ___he was late for the meeting was _____his car had been blocked by an accident.A that; why B. how; whyC why; that D. why ; because9 Determination is a kind of basic quality and is ______it takes to do jobs well.A that he would lieB he would lieC. that he lieD. that he must lie10 Black should have taken the doctor’s advice _____in bed for a day or two.A. that he would lieB. he would lieC. that he lieD. that he must lie11 –Hi! Lily, Come in.--Oh, yeah, I stopped by to see ______you were still looking for a roommate to share your house.A. thatB. ifC. howD. why12 –Why are you always making such mistakes?--Sorry. I think I was not ________this morningA. myselfB. for myself;C. to myselfD. by myself13 Nowadays the doctors are trying their best to reducepeople’s fear _____they would be affected by the present disease.A. whyB. howC. ifD. that14 The small mountain village where we spent our holiday last summer is _____is now part of Hunan.A. whichB. whatC. thatD. where15. –Who was the first man on the moon?-- I have no idea_________ A. who was the first man on the moonB. if the first man on the moon wasC. who the first man on the moon wasD. whether the first man on the moon was 16 We were interested in _____we had seen at the exhibition.A. whichB. thatC. all whatD. all17 _____we’ll go camping this Sunday depends on the weather.A. IfB. CanC. WhetherD. That18.______troubles me most is _____I can’t learn all these English idioms by heart.A. What; thatB. That; whatC. What; whatD. That; that19 –I drove to Urumuqi for the air show last week.--Is that ________you had a few days off?A. whyB. whenC. whatD. where20 Mother made a promise _______ I passed the final exam,she would buy me a bicycle.A. thatB. whetherC. ifD. that if21 We have been walking a long way, so ________is a good rest.A. what are we really neededB. what we really needC. That we really needD. what do we really need22 Can you tell me ______the People’s Hospital?A. how can I get toB. how can I arriveC. how I can get toD. where canI reach23 _______will be suitable for the position?A. Who you think ofB. Whom do you thinkC. Who do you thinkD. Do you think who24 We all agree with him on ___he suggestedA. whatB. thatC. all whatD. how25 That true value of life lies not in ________, but in __________.A. that we get; which we giveB. which we get; that we giveC. how we get; what we giveD. what we get; what we give26 The warm-hearted man often helps ________is in trouble.A. whoB. whoeverC. whomeverD. whom27 –Where is Brown?--He is ____you told him to go A. where B. which C. what D. there28 No one can be sure ____in a million years.A. what look will man likeB. man will look like whatC. what will man look likeD. what man will look like29 I am lucky _______the thing I enjoy doing most is _________I’ve ended up doing.A. what; whatB. that; thatC. what; thatD. that; what30 –I told you ________he would come to see you.--Actually I had little doubt ________it was trueA. whether; thatB. that; thatC. if ;thatD. whether ; if答案与解析：1 D 全句意思是：“我没有心思听他讲的话，所以恐怕他说的话我有一半没有听到。