高中英语语法名词性从句的概念及分类
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、同位语等。因此根据它在句中不同的句法功能，名词性从句又分主语从句、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 引导名词性从句的连接词可分为三类: 从属连词: 不充当从句的.任何成分 连接代词:what、whatever、who 、whoever、 whom 、whomever、 whose 、which、 whichever 连接副词: 等 ★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 名词性从句的重难点 一 、名词性从句的语序 语序 二 、名词性从句引导词间的区别 1 、 whether 与 i f 的区别 whether 与if均为是否的意思。
高中英语名词性从句总结 谢谢
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，因此根据它在句中不同的语法功能，名词性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分类引导名词性从句的连接词可分为三类: 连词
5.个:that 宾语从句或表语从句中that有时可以省略 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” 以上在从句中均不充当任何成分 连接代词
9.个:what, whatever, who, whoever, whom, whomever, whose, which, whichever 连接副词
7.个:when, where, how, why, whenever, wherever, however 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，只可用whether:
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. 常与 “or not” 连用；if 则不可。
5. 引导同位语从句 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. 二. 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，as if和because等连接代词what，who，which，whatever，whoever，whom等以及连接副词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。because引导表语从句。注:whom、who指人，what指物，whatever，whoever表示泛指意义。
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。 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 suggested requested, proposed, desired, etc. that…
三.宾语从句名词从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。
We must never think that we are good in everything while others are good in nothing. 我们决不能认为自己什么都好，别人什么都不好。 注意:在demand、order、suggest、decide、insist, desire, request, command, doubt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。
3. 用whether或if引导的宾语从句，其主语和谓语的顺序也不能颠倒，仍保持陈述句语序。此外，whether与if 在作“是否”的意思讲时在下列情况下一般只能用whether，不用if: a. 引导主语从句并在句首时；b. 引导表语从句时；c . 引导从句作介词宾语时；d. 从句后有“or not”时；e. 后接动词不定式时。例如: Whether there is life on the moon is an interesting question. 月球上有没有生命是个有趣的问题。
Everything depends on whether we have enough money. 一切要看我们是否有足够的钱。 I wonder whether he will come or not. 我想知道他来还是不来。 Can you tell me whether to go or to stay? 你能否告诉我是去还是留？
4. 注意宾语从句中的时态呼应，当主句动词是现在时，从句根据自身的句子情况，而使用 不同时态。
例如: I know that he studies English every day. 从句用一般现在时 I know that he studied English last term. 从句用一般过去时 I know that he will study English next year. 从句用一般将来时 I know that he has studied English since 199
8. 从句用现在完成时 当主句动词是过去时态could, would除外，从句则要用相应的过去时态，如一般过去时，过去进行时，过去将来时等；当从句表示的是客观真理，科学原理，自然现象，则从句仍用现在时态。例如: The teacher told us that Tom had left us for America．
5. 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。
四.表语从句在复合句中，位于系动词之后作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样，表语从句位于连系动词后，有时用as if引导。
其基本结构为:主语 + 系动词 + that从句。例如: The fact is that we have lost the game. 事实是我们已经输了这场比赛。 That’s just what I want. 这正是我想要的。 This is where our problem lies. 这就是我们的问题所在。
That is why he didn’t come to the meeting. 那就是他为什么不到会的原因。 It looks as if it is going to rain. 看上去天要下雨了。 需要注意的，当主语是reason时，表语从句要用that引导而不是because。
例如: The reason why he was late was that he missed the train by one minute this morning . 【注意】whether 可引导表语从句，但与之同义的if却通常不用于引导表语从句。
五.同位语从句同位语从句说明其前面的名词的具体内容。同位语从句通常由that引导，可用于同位语从句的名词有advice、demand、doubt、fact、hope、id。
高中英语名词性从句和定语从句的语法总结（详细一点）名词性从句是由if, whether, that 和各种疑问词充当连接词所引导的从句,其功同名词一样. 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,而本身放在句子末尾.
1. It 作形式主语和it引导强调句的比较 It 作形式主语代替主语从句,主要是为了平衡句子结构,主语从句的连接词没有变化.而it引导的强调句则是对句子某一部分进行强调,无论强调的是什么成分,都可用连词that.被强调部分指人是也可用who/whom.
2. 用it 作形式主语的结构
1. It is ＋名词＋从句
2. it is ＋形容词＋从句
3. it is ＋不及物动词＋从句
4. it ＋过去分词＋从句
3. 主语从句不可位于句首的五种情况
1. if 引导的主语从句不可居于复合句句首.
2. It is said , reported …结构中的主语从句不可提前.
3. It happens…, It occurs… 结构中的主语从句不可提前.
4. It doesn’t matter how/whether …结构中的主语从句不可提前.
5. 含主语从句的复合句是疑问句时,主语从句不可提前.
4. What 与that 在引导主语从句时的区别 What 引导主语从句时在句时在从句中充当句子成分,如主语．宾语．表语,而that 则不然. 定语从句也称为关系从句或形容词性从句,由关系代词who, whom, whose, which, that或关系副词as, when, where, why等引导.关系词除了起引导作用外,还在从句中指代前面的先行词,并在从句中担任一定的成分.
一.限定性定语从句和非限定性定语从句 定语从句就其与先行词的关系而言,可分为限定性定语从句和非限定性定语从句.限定性定语从句和先行词之间没有逗号,表示对先行词起修饰限制作用；而非限定性定语从句和先行词之间有逗号分开,是对先行词进行补充说明,相当于并列句.如: He is the man who has strong personality. 他是个个性很强的人.限定性定语从句 My brother, who works abroad, is coming next week. 我哥哥在国外工作,他下周将回来.非限定性定语从句 注:
1. 非限定性定语从句不能用that来引导,一般用which,as或who指人.用which或as引导时,既可以修饰主句的部分内容,也可修饰主句的全部内容.如: He spoke confidently, which impressed me most. which指代整个主句,在从句中作主语
2. as引导的非限定性定语从句既可以放在主句之前,也可以放在主句之后,但which或who引导的非限定性定语从句不能放在主句之前.如: As we all know, the moon is a satellite of the earth. The large area is covered with thick snow, which affects people’s life greatly.
3. 在限定性定语从句中,关系代词作宾语时可以省略；但在非限定性定语从句中,关系代词作宾语时不能省略.如: The film which I saw last night is about a young teacher. which可以省去 She introduced me to her husband, whom I hadn’t met before. whom不能省去
二.通常只用关系代词that,不用 which,who或whom的几种情况
1. 当先行词是all, everything, nothing, something, anything, little, much, none, few等时.如: All that you want are here.
2. 当先行词被all, no, some, any, every, a few, a little, much, only, very等修饰时.如: There is no person that doesn’t make mistakes.
3. 当先行词被序数词或形容词最高级修饰时.如: This is the best film that I have ever seen.
4. 当出现两个或两个以上的先行词,并同时兼指人和物时.如: We are talking about the people and countries that we have visited.
5. 当主句是以which 或 who 开头的特殊疑问句时.如: Who is the person that is standing over there?
6. 当定语从句为there be 句型时,关系代词只能用that,但经常可以省略.如: I know the difference that there is between you.
7. 当关系代词在从句中作表语时,常用that.如: He does not seem to be the man that he was. 他似乎和过去不一样了.
三.as 与其他词连用引导的定语从句 as 引导定语从句时,可指人也可指物,通常与the same,such,so等连用,形式为:the same… as,such… as,as …as,so… as.As在定语从句中可作主语、宾语、表语等.如: She knew he felt just the same as she did. 她知道他的感觉与她自己的一样.as代替事,作宾语 I lend you such books as will interest you. 我借给你使你感兴趣的书.as代替物,作主语 注:the same… as 和the same… that的用法不同.as引导的定语从句表示其内容与主句所讲的事物“相似”,指同类事物；that引导的定语从句表示其内容与主句所讲的事物是“同一个”,指同一事物.如: This is the same pen as I lost yesterday. 这和我昨天丢的笔一样.类似的笔 This is the same pen that I lost yesterday. 这支笔就是我昨天丢的那支.同一支笔
四.“介词+关系代词”引导的定语从句 在“介词+which/whom”结构中,介词的选择取决于三种情况: 1．定语从句中谓语动词或表语的搭配.如: This is the college in which I am studying. He is the man about whom we are talking. 2．先行词与介词的习惯搭配.如: The speed at which the machine operates is shown on the meter. 仪表上显示出这台机器运转的速度. 3．当定语从句为最高级时只能用of which; 否则用其他介词.如: I have five dictionaries of which Longman Dictionary is the best. I have five dictionaries among which Longman Dictionary is published in UK. 注:不可拆分的动词短语介词不能提前,如put up with；有的短语可能有不同的介词搭配,此时需要根据上下文来确定.如:be familiar with/to,compare with/to等. 有时为表意清楚,还可以在关系副词where/ when前加介词from, to等.如: China is the birthplace of kites, from where kite flying spread to Japan, Korea, Thailand and India. 中国是风筝的故乡,从这里,放风筝的运动传到了日本、韩国、泰国和印度.。
求 高中英语名词性从句的区别及注意事项
名词性从句一.概念:在从句中起名词作用的从句即名词性从句。它们是:主语从句，宾语从句，同位语从句和表语从句。
二.引起名词性从句的连词:
1.that 无意义，只起倒引起从句的作用，如引导宾语从句可省略。That he beat his opponent in the tennis game encouraged his teammates.He said that another child was infected with bird flu.The fact is that he knows nothing about it.应用于Her dream that she will become a woman astronaut is sure to come true.
2.what 有意义，”所……的”或随句子意思而定。在从句中作主语，宾语和表语。 What makes her different from others is her strange behaviour. This is what I want to say. Please tell me what it is.
3.whether 有意义，“是否”，引导宾语从句可以用if。 Whether it is true is not certain. He asked me whether/if he could ask another question.
4.when 引起表示时间的名词性从句，意思是“……的时候”或“何时……” When we can get rid of the rubbish is still unknown. They didn’t know when they could meet again. The question is when the money can be collected.
5.where 引起表示地点的名词性从句，意思是“在……的地方”或“到……的地方” Where the meeting will be held hasn’t been decided. Everyong wants to know where the plant can be found.
6.how 引起表示方式的名词性从句，意思是“……的方式”或“如何……” The problem is how we can get out of the trouble. How we can get in touch with him is the most important.
7.why 引起表示原因的名词性从句，意思是“……的原因”或 “为什么……” Why he said that rubbish at the meeting puzzled me. At last,he told us why he didn’t agree with us.
8.who “谁” ,whom“谁”，whose“谁的” Who will be chosen is the topic of conversation now. I want to know who/whom you really want to see. Whose handwriting is the most beautiful is very clear now.
9.疑问词+ever 也可以引起名词性从句 Whatever was said here must be kept secret. Whoever fails to see this will make a big mistake. I’ll give it to whoever likes it. Parents shouldn’t give their children whatever he/she wants.三. 名词性从句的种类:四种——主语从句，宾语从句，同位语从句和表语从句
1. 主语从句:在复合句中充当主语的从句叫主语从句，上述引导词除if外均可引起主语从句。
Who has been chosen is still a secret to all. That one believes in oneself in doing everything is very important.注意:主语从句如果偏长，可将其移至谓语动词之后，前面用it作形式主语。That he is an honest boy is known to all.→It is known to all that he is an honest boy.That the Chinese volleyball team once won six world championships successively is true.→It is true that the Chinese volleyball team once won six world championships. 在It is insisted/ordered/commanded/suggested/advised/proposed/demanded/required/requested…that…结构中，谓语动词常用should+动词原形。如:It is suggested that we should think twice before we act. It is requested that we should change the old instrument. 另外，在It is necessary/important/strange/surprised that…或 It is a pity/shamethat… 也用 should + 动词原形 如:It is a pity that he should go without telling anyone. It is necessary that you should tell him the truth.
2. 宾语从句:在复合句中作宾语的从句叫宾语从句，以上连词都可引起宾语从句。
Everyone knows that he always gives answers and never ask questions,so he is called Mr Know-all.宾语从句应注意的几个问题:① 当一个动词带有两个或两个以上that 引导的宾语从句时，第一个that 可以省略，但从第二个开始不可以省略。 He said that he would spend his winter holiday in London this year and that it would be the first time he would spend his holiday alone abroad.② 当宾语从句有补语时，要用形式宾语it代替，而将宾语从句移至补语后，同时that不可省略。 We should make it clear that protecting the environment is everyone’s duty.We find it important that one forms a good habit.③ 在tell sb. that…; order sb.that…; remind sb.that…; explain to sb. that…; whisper to sb. that…等结构中that 不可省。
He told me that he was going abroad next month. He whispered to me that the man in blue is a policeman.④ 在be+adj.后的宾语从句中，that 可以省略。 I’m glad that I’ll see all my fiends soon. I’m sure that he will stand on our side.⑤ whether和if 均能引起宾语从句，但是if 只能在动词后，在介词后要用whether。 He asked whether/if we could do him a favour. We wondered whether/if he would come or not.—Will you come tomorrow?—Sorry,I really don’t know. It depends on whether it is raining or not.⑥ 宾语从句在时态上要求与主句一致即时态呼应，也就是说主句为一般现在时，从句可用任何时态；如从句为一般过去时态，主句应为过去时的某种时态。
当然，从句为普遍真理和自然现象者例外. He says that he lives around the corner. He says that he has been here for a long time. He says that he once worked as a cook. He says that he is expecting his father’s telephone. He said that he was learning English for the 2008 Beijing Olympic Games. He said that he would go abroad for further information. He said that it does not snow in winter in Australia.⑦ 在某些动词后的宾语从句中用虚拟语气，其结构为should+动词原形，should 可以省略。这些常用动词是:一个坚决要求insist; 两个命令order,command; 三个建议suggest,advise,propose；四个要求ask,demand,request,require 注意:insist有两个意思“坚决要求”和“坚持认为”，前者用虚拟语气，而后者用陈述语气实际时态；同样suggest 也有两个意思“建议”和“表明”或“暗示”，当“建议”讲时用虚拟语气，否则用陈述语气实际时态。 如:He insisted that he should go to the front.虚拟语气 He insisted that Tom was honest and hardworking.陈述语气 She suggested that she should answer the phone immediately.虚拟语气 The smile on her face suggested that he was satisfied with the result.陈述语气上述其他动词后一律用should+动词原形如 They requested that an immediate answer should be given. He ordered that the troops should start at once.
3.同位语从句:idea,fact,rumour,message,news,hope,belief,thought,doubt,proof,evid-ence，promise,probability等名词后出现的that 或wh-引导的从句作同位语，人们称之为同位语从句，同为语从句对所修饰得词起解释说明的作用。I had no idea that you were here.They expressed the hope that they would visit China again.There is no doubt that he is not fit for the job.The question how they could get the information was brought forward at the meeting .The government warned that the rumour that an earthquake would hit Harbin was not believable.在下列同位语从句中，谓语动词用should+动词原形:One’s suggestion /advice/order/requirement/request/that… 如:My suggestion that we should collect money for the poor girl has been taken.
4.表语从句:由that, as if, wh-等引起的作表语的从句叫做表语从句。
The manager’s suggestion is that the new products should be put in market as soon as possible. The fact remains that we are behind some developed countries. It seems /appears as if the problem has been settled. That’s what we should do. Asia is no longer what it used to be. That’s where we differ. That was how we were defeated. That was when our football team was formed. That was why we decided to put off the discussion. 在下列表语从句中，谓语动词用should+动词原形: One’s suggestion/requirement/order… is that… 如:My suggestion is that we should give him another chance. Her requirement is that she should be sent to Tibet to work.四. 解题要点: ①如果从句意思完整，须用that,因为that 不作成分。 ②在涉及到“是否……”时用whether,if只用在动词后的宾语从句中，而且也可以换成whether. ③that和what不可混淆，that无意义，不作成份；what有意义，做成分 ④that的不可省。
高中英语语法 的名词性从句
名词性从句名词性从句就是在句子中充当名词功能的以相关从属连词引导的从句，包括主语从句、宾语从句、表语从句和同位语从句四种。1．主语从句:以连词 that what whom whose what which whoever whatever whichever where when how why 引导，在句子中充当主语。
例:What she said is not yet known. How this happened is not clear to anyone.Whoever comes is welcome.That she will do well is her exam is certain.It is certain that she will do well in her exam.注:it 为形式主语，2．宾语从句:以连词 that who whom whose what 等引导，在句子中充当宾语。例:He told us that he felt ill.Everybody knows what happened.I doubt whether he will succeed.I wonder what he is writing about.3．表语从句:以 that whether who whom whoever when where when 等引导，在句子中充当表语。例:The trouble is that I lost his address.The question is whether they will be able to help us.That was what she did this morning.This is why we puts off the sports meeting.4．同位语从句:同位语从句有自己的先行词，它跟定语从句很相似，先行词包含从句中所含内容，从句不起修饰作用。我们将在学习定语从句时，在加以详细比较，多用在连词what 引导。不用which，此外还可用whether who where 等也可以引导。
在这章中我们着重学习that whether 引导的同位语从句，引导同位语从句的先行词常用的有:fact news idea whether reply promise truth report remark 等。例:I heard the news that the Chinese football team defeated the Japanese team last night. I have no idea whether he will come or not. They were all much worried over the fact that you were sick.关于名词性从句的学习主要是我们应在学习中加以练习，在练习中反复学习，在多次重复学习和练习中加以掌握。
