引导名词性从句的连接词
引导名词性从句的关联词
引导名词性从句的关联词在传统的语法中，有连接代词、连接副词和关系代词、关系副词之分；连接代词、连接副词引导名词性从句和关系代词、关系副词引导定语从句。
本书根据最新资料不再作此分类，通称关系代词和关系副词。
引导名词性从句的关联词大致相同，它们分别是：连词：that, whether, if；关系代词：who, what, which , whom, whose, whatever, whoever, whomever, whichever；关系副词：when, where, how, why,however, whenever, wherever。
引导从句时一般不用逗号和主句分开。
详细见下表：类别词义在从句中的作用that 无任何词义仅起连接作用，在从句中不充当任何句子成分if和whether 意为“是否”，表明从句意义的不确定性起连接作用，在从句中不充当任何句子成分关系代词who, what, which,whom, whose, whatever, whoever, whomever, whichever 有各自自身的意义起连接作用，并在从句中充当主、表、宾、定语等关系副词when,where,why,how, however, whenever, wherever 有各自自身的意义起连接作用，并在从句中充当状语1、that从句与wh-关系代词和关系副词引导名词性从句的区别连词that在从句中不作成分，不含疑问意义；而wh-连词在从句中作成分，且含有疑问意义；或what/where从句相当于一个名词后加一个定语从句。
It worried her a bit that her hair was turning grey. 她的头发在变白令她有点担忧。
（that在从句中只起引导词作用，不作成分）What caused the accident is still a complete mystery. 事故发生的原因仍然是个不解之谜。
名词性从句连词篇
名词性从句之连词篇在复合句中起名词作用的从句叫名词性从句。
根据其在句中的不同语法功能，名词性从句可分为主语从句、宾语从句、表语从句和同位语从句。
引导名词性从句的有：连词that, whether, if, because；连接代词what, whatever, who, whoever, whom, whose, which和连接副词when, where, how, why等。
高考对名词性从句的考查主要体现在连接词的选择上，我们一起来看下面几组连接词的用法区别。
1. if与whether：在引导宾语从句时，两者常可互换；但在引导主语从句、表语从句和同位语从句时只能用whether。
如：1) I wonder whether the sports meeting will be held as planned next week.（whether引导的宾语从句，可用if代替。
）2) Whether the sports meeting will be held as planned next week depends on the weather. （whether引导的是主语从句，不能用if代替。
）2. whether, if与that：在引导名词性从句时，whether和if含有疑问、不确定的意义，而that 表示肯定、确定的含义。
如：1) There is still doubt whether the experiment will be a success.(doubt用于肯定句时，后接whether引导的同位语从句。
)2) There is no doubt that the experiment will be a great success.(doubt用于否定句时，后接that引导的同位语从句。
)3. that与what：that是连词，在名词性从句中只起连接作用，不作任何成分；what是连接代词，在从句中可作主语、宾语、表语等。
名词性从句与连接词的关系及例句整理
名词性从句与连接词的关系及例句整理名词性从句是指在句子中充当名词的从句。
它可以在句子中担任主语、宾语、表语、同位语等成分。
而连接词是将名词性从句与主句连接起来的词语，起到引导和连接的作用。
名词性从句与连接词之间的关系密切，正确使用连接词可以更好地构建句子。
一、名词性从句的引导词及作用1. 从属连词"that"和"whether/if"从属连词"that"引导的从句多用作宾语，可以代替较正式的"whether/if"。
比如：- I don't know that he will come to the party.- I don't know whether/if he will come to the party.2. 连接代词"what", "where", "when", "which"和"who"连接代词本身在名词性从句中充当主语、宾语、表语或同位语。
比如：- What she said surprised me. (作宾语)- Where he lives is a mystery. (作主语)- This is the place where we met. (作表语)- The question is which is better. (作同位语)- I'm not sure who will win the game. (作宾语)3. 连接副词"how", "why"和"whether/if"连接副词一般引导名词性从句作表语或宾语。
比如：- The question is how we can solve the problem. (作表语)- He asked me why I was late. (作宾语)- I'm not sure whether/if it will rain tomorrow. (作表语)二、名词性从句的例句整理1. 主语从句主语从句在句子中充当主语，常由连接代词"what", "where", "when", "which", "whether/if"等引导。
名词性从句的连接词
名词性从句连接词
引导名词性从句的连接词可分为三类：
1、连接词：that, whether, if （不充当从句的任何成分）
2、连接代词：what, whatever, who, whoever, whom,whose, which
3、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.。
名词性从句知识点
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。
英语连接词用法
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。
例如：That she was chosen made us very happy.?她被选上了，我们很高兴。
We heard the news that our team had won.我们听到消息说我们队赢了。
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"关系代词有：who, whom, whose, that, which等。
关系副词有：when, where, why等。
关系代词引导的定语从句关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。
关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。
1）who, whom, that这些词代替的先行词是人的名词或代词，在从句中所起作用如下：Is he the man who/that wants to see you?他就是你想见的人吗？（who/that在从句中作主语）He is the man whom/ that I saw yesterday.他就是我昨天见的那个人。
（whom/that在从句中作宾语）2) Whose 用来指人或物，(只用作定语, 若指物，它还可以同of which互换）, 例如：They rushed over to help the man whose car had broken down. 那人车坏了，大家都跑过去帮忙。
引导名词性从句的连接词可分为三类
带领名词汇性从句的连交词汇可分为三类：之阳早格格创做连词汇：that（无所有词汇意）whether,if（均表示“是可”标明从句真质的没有决定性）as if ,as though（均表示“佳像”，“好像”）以上正在从句中均没有充当所有身分连交代词汇：what, whatever, who, whoever, whom,whose, whichever,whomever连交副词汇:when, where, how, why,how many,how much,how often没有成简略的连词汇：1. 介词汇后的连词汇2. 带领主语从句战共位语从句的连词汇没有成简略.主语从句（正在复合句中，做句子的从句喊主语从句.带领主语从句的词汇有从属连词汇that，whether以及连交代词汇who，what，which，whoever，whatever，whichever呵连交副词汇when，where，why，how等.）it做形式主语的从句1. It is +adj./n.+从句比圆：It is a pity/shame that…遗憾的是…2. It +vi.+从句比圆：It seems that…好像…It happened that…碰巧…3. It+be+往日分词汇+从句比圆：It said that…传闻…注意：“it is necessary / natural / important / stange…+that从句”那种句型里，that所带领的主语从句中谓语动词汇用“should+本形”，表假造语气.带领词汇that取whatThat带领主语从句是，只起连交效率，自己无本质意义，正在从句中没有继承所有句子身分，但是没有克没有及简略；what既有带领主语从句的效率，共时又正在从句中做句子身分（主语、宾语、表语、等），那时what相称于all that/everying that…比圆：What we can’t get seems better than what we have.咱们得没有到的物品好像比已得到的要佳.带领词汇if战whether带领主语从句时只可用whether而没有克没有及用if其余带领词汇连交代词汇who，which，whom，whose有各自的意义，起连交效率，并正在从句中充当主语、宾语、表语、定语等；连交副词汇when，where，why，how等有各自的意义，起连交效率，并正在从句中充当状语.宾语从句带领词汇1. 由连词汇that带领的宾语从句连词汇that带领宾语从句时，that正在句子中没有担当所有身分，正在心语或者非正式文体中常被简略.注意：①如果及物动词汇后里有二个（或者二个以上）并列的宾语从句时，惟有第一个连词汇that不妨简略.②正在demand，order，suggest，mand等表示央供、下令、修议、决断等意义的动词汇后，宾语从句时常使用“（should）+动词汇本形”③当宾语从句后交宾语补脚语事，时常使用it 干形式宾语，而将宾语从句后置.2. 由连词汇whether或者if带领的宾语从句Whether或者if带领宾语从句是仍生存“是可”的含意，从句仍脆持报告语序，whether或者if正在从句中没有继承身分.3. 由连交代词汇或者连交副词汇带领的宾语从句比圆：Could you please tell me how you use the new the panel?(您能报告尔怎么用那个心的支配盘吗？)时态正在宾语从句中，从句的时态时常受到主语从句时态的效率，果而正在使用时要注意主从句二部分的时态脆持普遍.普遍要按照以下准则：1. 主句如果是当前或者将去时态，从句不妨所有所需要的时态2. 主句如果是往日时态，从句谓语动词汇普遍要用往日时态的某种形式.注意：当从句形貌的是客瞅究竟或者客瞅真理是，从句要用普遍当前时.语序常常情况下宾语从句的语序用报告句语序，即“主语+谓语”表语从句带领词汇1. 连词汇that带领的表语从句That仅起连交效率，偶尔思，正在句中没有做所有身分，常常没有克没有及简略.那种从句往往对于主句主语的真质起进一步阐明的效率.其基础结构为“主语+系动词汇+that从句”2. 连词汇whether带领的表语从句连词汇whether起连交效率，意为“是可”，正在句中也没有做所有身分.3．连交代词汇what,which,who,whom,whose 带领的表语从句连交代语what,which,who,whom,whose除正在句子中起连交效率中，还不妨正在从句中充当主语、宾语、表语、定语，且各有各的词汇义.4．连交副when,where,how,why带领的表语从句连交副词汇when,where,how,why除正在句中起连交效率中，正在从句中还充当时间、天面、办法、本果状语，自己具备词汇义.5. 其余连词汇because,as if/ as though带领的表语从句because带领的表语从句常常只用于“This/That/ It is /was because…’’结构中：as if/ as though带领的表语从句如果取究竟相符，从句用报告语气：如果从句的真质取究竟没有相符，则用假造语气.几面注意事项1．表语从句一定要用报告句语序.2．If取whether意义均为“是可”，但是带领表语句时，只可有whether，没有克没有及用if.3．当主语是reason时，其后的表语从句要用that带领.4．除了系动词汇be除中，其余系动词汇，如feel,seem,appear,look,remain等之后也不妨跟表语从句.。
英语语法名词性从句用法小结
英语语法名词性从句用法小结名词性从句在句子中起名词作用的句子叫名词性从句(Noun Clauses）。
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. 名词性从句的连接词引导名词性从句的连接词可分为四类：1. that（无含义，不充当成分）2. whether, if（有“是否”的含义，但不充当成分）3. 连接代词：what, whatever, who, whoever, whom, whomever,whose, which,whichever.（在从句中做主语、宾语、表语和定语）连接副词：when, whenever,where,wherever, how, however,why（在从句中做状语）4. as if,as though,because（不充当成分，在名词性从句中只引导表语从句）二. 四类名词性从句语法要点1.主语从句在整个句子中用作主语的从句叫主语从句。
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。
it 作形式主语：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。
It is clear that he is innocent in the accident.很明显，他在这场事故中是无辜的。
2. 宾语从句在整个句子中用作宾语的从句叫宾语从句。
He has told me that he will go to Shanghai tomorrow.他已经告诉我他明天要去上海。
名词性从句
名词性从句一、名词性从句的连接词引导名词性从句的连接词有三类：连接词、连接代词和连接副词。
1. 连接词有：that（本身无意义），whether/if （是否）。
连接词只起到连接作用，在从句中不作任何成分。
2. 连接代词：who，whom，whose，which，what，whatever，whoever等。
它们不但起到连接作用，还在句中充当主语、宾语、定语、表语等成分。
3. 连接副词：when（= the time when），where（=the place where），how（=the way/that in which）, why (=the reason why ), 它们不但起到连接作用，还在从句中作状语。
注意：what与that引导名词性从句的区别1. what在名词性从句中可充当主语、宾语、表语，意义相当于the thing(s) that, 引导主语从句时，其谓语动词的单复数依句意而定。
①What the lecturer said is very valuable.②We wonder what he will do next.2. that 引导名词性从句不作任何成分，无意义。
引导主语从句时，常用it作形式主语，谓语动词用单数，引导宾语从句时，that常被省略。
①That he will refuse the offer seems unlikely.②We have found (that) all the tickets have been sold out.③It is a pity that you missed such a fine talk.二、主语从句的基本用法1. that引导的主语从句既可放在句首，也可放在句尾，that只起到连接作用，无词义，在从句中不作成分，一般不能省略。
That we invited to a concert this evening is good news to us.= It is good news to us that we invited to a concert this evening.2. if/whether 引导的主语从句既可放在句首，也可放在句尾；引导的只能放在句尾，前面需要用it作形式主语。
语法突破技巧名词性从句的连接词与用法
语法突破技巧名词性从句的连接词与用法名词性从句是从句用作主语、宾语、表语或同位语的句子。
在英语语法中，连接词是将名词性从句与主句连接起来的关键。
一、连接词的种类1. 引导主语从句的连接词：（1）that：用于陈述句，作为主语从句的引导词。
例如："That he is late is not surprising."（2）whether/if：用于陈述句或者是一般疑问句，作为主语从句的引导词。
例如："Whether/If he is late is not surprising."2. 引导宾语从句的连接词：（1）that：用于陈述性宾语从句，例如："I know that he is late."（2）whether/if：用于是否疑问宾语从句，例如："I don't know whether/if he will come."（3）连接代词who, whom, whose, which, what：作为主语从句来引导名词性从句，例如："I don't know who/whom is responsible for this mess."3. 引导表语从句的连接词：（1）that：用于陈述性表语从句，例如："My belief is that he is late."（2）连接代词who, whom, whose, which, what：作为表语从句的引导词，例如："My concern is who/whom is responsible for this mess."4. 引导同位语从句的连接词：（1）that：用于同位语从句，例如："The fact that he is late is not surprising."（2）连接代词who, whom, whose, which, what：作为同位语从句的引导词，例如："His claim that he is late is not credible."二、使用技巧1. that的使用：（1）作为引导词时，可以省略在主语从句和表语从句中，例如："What surprises me is (that) he is late."（2）如果主句的动词是感觉动词（feel, believe, think, etc.）时，可使用that引导名词性从句。
名词性从句 定语从句 状语从句
1．名词性从句定语从句状语从句名词性从句相当于名词，可分别作主句的主语、表语、宾语和同位语。
因此，名词性从句厅分为主语从句、表语从句、宾语从句和同位从句。
（一）引导名词性从句的连接词1、连接代词：who whose whom what which。
有词义，在从句中担任成分，如主语、表语、宾语、或定语等。
2、连接副词：when where why how。
有词义，在从句中担任成分，作状语。
3、从属连接词：that whether if as if。
that 无词义，在从句中不担任成分，有时可省略；if whether as if 虽有词义，但在从句中不担任成分。
注意：连接代词与连接副词在句中不再是疑问句，因而从句中谓语不用疑问式。
连接代词与连接副词在从句充当句子成分，连接词（从属连词）whether 和if（是否），as if（好象）在从句中不充当句子成分，只起连接作用。
根据句义，如果连接代词与连接副词，whether、if 和as if 都用不上时，才用that 作连接词（that 本身无任何含义）。
（二）主语从句1、主语从句在复合句作主语。
e.g. Who kept the door open all night was unkonwn.2、用it 作形式主语，主语从句放在句末。
e.g. It doesn‟t matter so much whether you will come or not.3、that 引导主语从句时，不能省略。
e.g. That he suddenly fell ill last week made us surprised. It made us surprised that he…（三）表语从句1、表语从句在复合句中作表语，位于系动词之后。
e.g. The question was who could go there.2、引导表语从句的连接词that 有时可省去。
(完整版)名词性从句用法归纳
名词性从句：在句子中起名词作用的句子叫名词性从句(Noun Clauses）。
名词性从句在复合句中能担任:主语、宾语、表语、同位语、介词宾语等。
名词性从句分为：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：1、从属连词（5个）：（1）that无词义，在从句中不做成分，在宾语从句或表语从句中that有时可以省略（2）whether，if 有词义，在从句中不做成分（whether，if均表示“是否”之意，表明从句内容的不确定性）不可以省略（3）as if, as though （均表示“好像”，“似乎”之意）在从句中不做成分2、连接代词（9个）：what, whatever, who, whoever, whom, whomever, whose, which, whichever，有词义，在从句中做成分，不可以省略（who what which 在从句中做主语、宾语、其中what 指代没有范围的事物，which指代有范围的事物，表“选择哪一个”whom做宾语whose 做定语）3、连接副词（7个）：when, where, how, why, whenever, wherever, however有词义，在从句中做状语，不可以省略4、that省略的情况：（1）定语从句中做宾语（2）that引导宾语从句时（3）that引导表语从句时（4）主语从句中it做形式主语，that从句置于句末时5、that不可省略的情况：（1）定语从句中做主语（2）由that引导主语从句放句首时（3）that引导同位语从句时（4）宾语从句中i it做形式宾语，真正的that宾语从句中that不可以省略ii 一个句子有两个或多个并列的宾语从句时，引导第二个和以后几个句子中的that不可以省略iii 与动词相隔的宾语从句，不可以省略iv that引导的宾语从句放在句首时，不可以省略二. 主语从句1、主语从句：作句子主语的从句叫主语从句。
语法复习三：名词性从句+16开
三,选择填空: 1. Do you see _____ I mean? A. that B./ C. how D. what
2. Tell me_____ is on your mind. A. that B. what C. which D. why
3. We must stick to _____ we have agreed on. A. whatB. that whatB. 4. Let me see _____. A. that can I repair the radio C. I can repair the radio 5. Keep in mind _____. A. that the teacher said C. that did the teacher say
语法复习三:名词性从句 语法复习三:
名词性从句相当于名词,可分别作主句的主语,表语,宾语和同位 语.因此,名词性从句厅分为主语从句,表语从句,宾语从句和同位从 句. (一)引导名词性从句的连接词 1,连接代词:who, whose, whom, what, which.有词义,在从句中 担任成分,如主语,表语,宾语,或定语等. 2,连接副词:when, where, why, how.有词义,在从句中担任成\ 分,作状语. 3,连接词:that, whether, if, as if.that 无词义,在从句中不 担任成分,有时可省略;if (whether), as if虽有词 义,但在从句中不担任成分.
一,判断下列各句哪句含有名词性从句,并指出是什么从句: 1. China is no longer what it used to be.
表语从句 同位语从句
2. The truth that the earth turn around the sun is known to all. 3. It was snowing when he arrived at the station.
名词性从句的连接词
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：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”）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.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和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。
名词性从句用法归纳
名词性从句用法归纳Make a little progress every day, January 5th, 2020名词性从句：在句子中起名词作用的句子叫名词性从句 Noun Clauses.. 名词性从句在复合句中能担任:主语、宾语、表语、同位语、介词宾语等..名词性从句分为：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：1、从属连词5个：1that无词义;在从句中不做成分;在宾语从句或表语从句中that有时可以省略2whether;if 有词义;在从句中不做成分whether;if均表示“是否”之意;表明从句内容的不确定性不可以省略3as if; as though 均表示“好像”;“似乎”之意在从句中不做成分2、连接代词9个：what; whatever; who; whoever; whom; whomever; whose; which; whichever;有词义;在从句中做成分;不可以省略who what which 在从句中做主语、宾语、其中what 指代没有范围的事物;which指代有范围的事物;表“选择哪一个”whom做宾语whose 做定语3、连接副词7个：when; where; how; why; whenever; wherever; however有词义;在从句中做状语;不可以省略4、that省略的情况：1定语从句中做宾语2that引导宾语从句时3that引导表语从句时4主语从句中it做形式主语;that从句置于句末时5、that不可省略的情况：1定语从句中做主语2由that引导主语从句放句首时3that引导同位语从句时4宾语从句中i it做形式宾语;真正的that宾语从句中that不可以省略ii 一个句子有两个或多个并列的宾语从句时;引导第二个和以后几个句子中的that不可以省略iii 与动词相隔的宾语从句;不可以省略iv that引导的宾语从句放在句首时;不可以省略二. 主语从句1、主语从句：作句子主语的从句叫主语从句..主语从句通常由下列词引导：1从属连词that;whether 等；2连接代词what;who;which;whatever;whoever;whom 等；3 连接副词how;when;where;why 等..2、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..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.Who will win the match is still unknown.It is known to us how he became a writer.Where the English evening will be held has not yet been announced.注意：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：1It + be + 名词 + that从句：It is a fact that 事实是It is an honour that 非常荣幸It is common knowledgethat …是常识It is a pity that 遗憾……2It + be + 动词的过去分词+ that从句:It is said that 据说It is reported that 据报道It has been proved that 已经证明It is believed that … 人们认为It is supposed that… 据猜测3It + 不及物动词vi + that 从句：It seems that 似乎It happened that 碰巧It appears that 似乎4It + be + 形容词 + that从句It is natural that… 很自然…It is strange that… 奇怪的是…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 sugges ted requested; proposed; desired; etc. that…3、It 作形式主语和it引导强调句的比较①It 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..②it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引导;被强调部分指人时也可用who/whom..例如：a It is a pity that you didn’t go to see the film.b It doesn’t interest me whether you succeed or not.c It is in the morning that the murder took place. 强调句型d It is John that broke the window. 强调句型4、注意：since; if 不能引导主语从句;但当it做形式主语;主语从句放在句末时;if; whether均可5、主语从句不可位于句首的五种情况：1if 引导的主语从句不可居于复合句句首..2It is said /reported…结构中的主语从句不可提前..例如：正确表达：It is said that President Jiang will visit our school next week.错误表达：That President Jiang will visit our school next week is said.3It happens/occurs…结构中的主语从句不可提前..例如：正确表达：It occurred to him that he failed in the examination.错误表达：That he failed in the examination occurred to him.4It doesn’t matter how/whether …结构中的主语从句不可提前..例如：正确表达：It doesn’t matter whether he is wrong or not.错误表达：Whether he is wrong or no t doesn’t matter.5含主语从句的复合句是疑问句时;主语从句不可提前..例如：正确表达：Is it likely that it will rain in the evening错误表达：Is that will rain in the evening likely6、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..例如：a What you said yesterday is right.b That she is still alive is a consolation三、表语从句表语从句：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..可以接表语从句的系动词有be ;look ; remain保持; seem等常用的还有the reason is that … It is because … Itappears/seems that…It happens that… It turns out that…结果是...等结构由从属连词;连接代词;连接副词引导;其中that常常可以省略由as if; as though 引导It looks as if… It seems as if…why; because 都可以引导表语从句;但why强调结果;because强调理由当主语为suggestion; order; requirement; advice; request; demand 等这类名词时;表语从句用虚拟语气shoulddoif不能引导表语从句注意：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..四、同位语从句1、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;that不可以省略由whether引导;不可用if2、可用于同位语从句的名词有belief、advice、demand、doubt怀疑、possibility、though、proposal、case、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等..例如：The news that we won the game is exciting.I have no idea when he will come back home.The thought came to him that Mary had probably fallen ill.3、在no idea后用wh-疑问词引导4、同位语从句与定语从句的区别1 定语从句中的that既代替先行词;同时以在从句中作某个成分主语或宾语;而同位语从句中的that是连词;只起连接主句与从句的作用;不充当句中任何成分..2 定语从句是形容词性的;其功能是修饰先行词;对先行词加以限定;描述定的性质或特征；同位语从句是名词性的;其功能是对名词进行补充说明..例如：1 The news that he told me is that Tom would go abroad next year.他告诉我的消息是汤姆明年将出国..第一个that引导的从句是定语从句;that在从句中作宾语2The news that Tom would go abroad is told by him.汤姆将出国的消息是他讲的..同位语从句;that在句中不作任何成分五、宾语从句宾语从句：名词从句用作宾语的从句叫宾语从句..由从属连词、连接代词、连接副词引导..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.We must never think that we are good in everything while others are good in nothing.注意：在demand、order命令、suggest、decide、insist坚持; desire; urge;advice;propose;require;request; command命令; 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.The commander ordered that troops should set off at once.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.She always thinks of how she can work well.She will give whoever needs help a warm support.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.Everything depends on whether we have enough money.I wonder whether he will come or not.Can you tell me whether to go or to stay4. 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 1998. 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;guess; expect; fancy; consider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..6、后面不能接that从句的动词有：condemn谴责;判刑 force 强迫 take拿走 forgive原谅 dislike不喜欢 refuse拒绝 let like love help admire羡慕 allow celebrate cause注：以上动词后不能接that从句;但可以用不定式;动名词做宾语..六、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时;只能用whether;当it做形式主语;主语放句首时;whether;if均可eg:whether he can come to the party on time depends on the traffic2. 引导表语从句eg:The question is whether we can get in touch with her3. whether从句作介词宾语e.g:It depends on whether he will come.4.if与whether都可以与or not 连用;但后面紧跟or not 时只能用whetherWe didn't know whether or not she was ready.此时只能用whether I wonder whether/if the news is true or not.此时则二者都可以用5. 引导同位语从句Whether he will come is not clear.6.后接不定式时Eg I don’t know whether to go.7.在discuss后只能用whether注意：1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.2whether从句中不能有否定式;而if可以I don’t care if he doesn’t come.七、名词性that-从句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 she is still alive is her luck. 她还活着全靠运气..宾语：John said that he was leaving for London on Wednesday. 约翰说他星期三要到伦敦去..表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他..同位语：The fact that he has not been seen recentlydisturbs everyone in his office.近来谁也没有见过他;这一事实令办公室所有的人不安..形容词宾语：I am glad that you are satisfied with your job.2That-从句作主语通常用it作先行词;而将that-从句置于句末;例如：It is quite clear that the whole project is doomed to failure. 很清楚;整个计划注定要失败..It's a pity that you should have to leave. 你非走不可真是件憾事..用it作形式主语的that-从句有以下四种不同的搭配关系：a. It + be +形容词+ that-从句It is necessary that…有必要……It is important that…重要的是……It is obvious that…很明显……b. It + be + -ed 分词+ that-从句It is believed that…人们相信……It is known to all that…众所周知……It has been decided that…已决定……c. It + be +名词+ that-从句It is common knowledge that………是常识It is a surprise that…令人惊奇的是……It is a fact that…事实是……d. It +不及物动词+ that-从句It appears that…似乎……It happens that…碰巧……It occurred to me that…我突然想起……八、名词性wh-从句1由wh-词引导的名词从句叫做名词性wh-从句..Wh-词包括who; whom;. whose; whoever; what; whatever; which; whichever等连接代词和where; when; how; why等连接副词..Wh-从句的语法功能除了和that-从句一样外;还可充当介词宾语、宾语补语和间接宾语等;例如：主语： How the book will sell depends on its author.直接宾语：In one's own home one can do what one likes.间接宾语：The club will give whoever wins a prize.俱乐部将给得胜者设奖..表语： My question is who will take over president of the Foundation.宾语补足语：She will name him whatever she wants to.同位语：I have no idea when he will return.形容词宾语：I'm not sure why she refused their invitation.介词宾语：That depends on where we shall go.2Wh-从句作主语也常用先行词it做形式主语;而将wh-从句置于句末;例如：It is not yet decided who will do that job.It remains unknown when they are going to get married.九、if; whether引导的名词从句1yes-no型疑问从句从属连词if; whether引导的名词从句是由一般疑问句或选择疑问转化而来的;因此也分别被称为yes-no型疑问句从句和选择型疑问从句;其功能和wh-从句的功能相同; 例如：主语：Whether the plan is feasible remains to be proved.宾语：Let us know whether / if you can finish the article before Friday.表语：The point is whether we should lend him the money.同位语：They are investigating the question whether the manis trustworthy.形容词宾语： She's doubtful whether we shall be able to come.介词宾语： I worry about whether he can pass through thecrisis of his illness.2选择性疑问从句选择性疑问从句由关联词if/whether…or或whether…or not构成;例如：Please tell me whether / if they are Swedish or Danish.I don't care whether you like the plan or not.if和whether的区别：1、在动词不定式之前只能用whether ..如：例8 I can’t decide whether to stay.2、在whether …… or not 的固定搭配中..如：例9 I want to know whether it’s good news or not .3 、在介词后;只能用whether..如：例10 His father is worried about whether he lose hiswork ...4、宾语从句放在句首表示强调时;只能用whether ..如：Whether this is true or not; I really don’t know.例11 Whether they can finish the work on time is still a problem . 他们是否能准时完成这项工作还是个问题..－－此例为主语从句;有误;感谢指出5、用if会引起歧义时;只用whether..如：例12 Could you tell me if you know the answer这句话有两种意思：“你能告诉我是否知道答案吗”或“如果你知道答案;请告诉我;好吗”..如用whether可避免歧义.十、否定转移1 将think; believe; suppose; expect; fancy; imagine等动词后面宾语从句的否定词转移到主句中;即主句的谓语动词用否定式;而从句的谓语动词用肯定式..I don't think I know you. 我想我并不认识你..I don' t believe he will come. 我相信他不回来..注意：若谓语动词为hope;宾语从句中的否定词不能转移..I hope you weren't ill. 我想你没有生病吧..2 将seem; appear 等后的从句的否定转移到前面..It doesn't seem that they know where to go.看来他们不知道往哪去..It doesn't appear that we'll have a sunny day tomorrow.看来我们明天不会碰上好天气..3 有时将动名词;介词短语或整个从句的否定转变为对谓语动词的否定..I don't remember having ever seen such a man.我记得从未见过这样一个人.. not否定动名词短语having…It's not a place where anyone would expect to see strange characters on the street.在这里;人们不会想到在街上会碰上陌生的人..anyone 作主语;从句中的谓语动词不能用否定形式..4 有时状语或状语从句中否定可以转移到谓语动词前..The ant is not gathering this for itself alone. 否定状语蚂蚁不只是为自己采食..He was not ready to believe something just becauseAristotle said so. 否定because状语他并不因亚里斯多德说过如何如何;就轻信此事..She had not been married many weeks when that man's younger brother saw her and was struck by her beauty. 否定状语many weeks 她结婚还不到几个星期;这个人的弟弟就看见她了;并对她的美貌着了迷..。
名词性从句用法归纳
名词性从句用法归纳 Document number：PBGCG-0857-BTDO-0089-PTT1998名词性从句：在句子中起名词作用的句子叫名词性从句 (Noun Clauses）。
名词性从句在复合句中能担任:主语、宾语、表语、同位语、介词宾语等。
名词性从句分为：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：1、从属连词（5个）：（1）that无词义，在从句中不做成分，在宾语从句或表语从句中that有时可以省略（2）whether，if 有词义，在从句中不做成分（whether，if均表示“是否”之意，表明从句内容的不确定性）不可以省略（3）as if, as though （均表示“好像”，“似乎”之意）在从句中不做成分2、连接代词（9个）：what, whatever, who, whoever, whom, whomever, whose, which, whichever，有词义，在从句中做成分，不可以省略（who what which 在从句中做主语、宾语、其中what 指代没有范围的事物，which指代有范围的事物，表“选择哪一个”whom做宾语whose 做定语）3、连接副词（7个）：when, where, how, why, whenever, wherever, however有词义，在从句中做状语，不可以省略4、that省略的情况：（1）定语从句中做宾语（2）that引导宾语从句时（3）that引导表语从句时（4）主语从句中it做形式主语，that从句置于句末时5、that不可省略的情况：（1）定语从句中做主语（2）由that引导主语从句放句首时（3）that引导同位语从句时（4）宾语从句中i it做形式宾语，真正的that宾语从句中that不可以省略ii 一个句子有两个或多个并列的宾语从句时，引导第二个和以后几个句子中的that不可以省略iii 与动词相隔的宾语从句，不可以省略iv that引导的宾语从句放在句首时，不可以省略二. 主语从句1、主语从句：作句子主语的从句叫主语从句。
英语中名词性从句的用法
英语中名词性从句的用法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：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”）。
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.二、具体分类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。
引导名词性从句的连接词
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：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”）以上在从句中均不充当任何成分连接代词：What, whatever, who, whoever, whom, whose, whichever, whomever 连接副词：When, where, how, why, how many, how much, how often⼀、名词性that-从句主语：That she is still alive is her 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。
表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他。
同位语：The fact that he has not been seen recently disturbs everyone in his office. 近来谁也没有见过他，这⼀事实令办公室所有的⼈不安。
形容词宾语：I am glad that you are satisfied with your job.你对⼯作满意我感到很⾼兴。
⼀、⽆词义that引导名词性从句时⽆词义，仅仅起连接或引导从句的作⽤。
例如：I wish that she would understand me.我希望她能理解我。
It is said that there have been great changes in our hometown.据说，我们的家乡已经发⽣了巨⼤的变化。
The reason he didn't come was that he was ill. 他没有来的原因是他病了。
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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（无意义，不可省，不充当任何成分）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. 从句后有"or not"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。
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。
The question is whether she should have a low opinion of the test?现在的问题是她是否应该有一个低意见的测试？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 1998. （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、表语从句在句中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、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。
例如：The news that we won the game is exciting. 我们赢得这场比赛的消息令人激动。
I have no idea when he will come back home. 我不知道他什么时候回来。
The thought came to him that Mary had probably fallen ill. 他想到可能玛丽生病了。
同位语从句和定语从句的区别：that作为关系代词，可以引导定语从句，充当句子成分，在从句中作宾语时可以省略； that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。
试比较下面两个例句:I had no idea that you were here．（that引导同位语从句，不能省略）Have you got the idea（that）this book gives you of life in ancient Greece？（that引导定语从句，作宾语，可以省略）六、名词性that-从句（1）由从属连词that引导的从句叫做名词性that-从句。