名词性从句----绝对经典系列
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。
名词性从句完整版经典实用
(2)It +be+形容词 (necessary/natural/wonderful/likely/strange/important/certain等 )＋that从句
eg.It is wonderful that all of you have passed the difficult exam.
•名词性从句完整版
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误：If Mary really heard him is really doubtful. 正：Whether Mary really heard him is really doubtful. 正：It was doubtful if /whether Mary really heard him.
•名词性从句完整版
⒈连词：引导从句但不作任何成分。
⑴that—没有意义，引导主/宾/表/同位语从句。 ①It is said that there will be a party tonight. ②They say (that) there will be a party tonight. ③Why he failed was that he made a vital mistake. ④The key that he succeeded lied in his hard work. ⑵if—是否，引导宾语从句，主语从句。
2 It was a pity that you failed in the exam.
•名词性从句完整版
用it 作形式主语的结构
• It＋be＋名词(短语)(a pity/a shame/a surprise/no wonder等)＋ that从句
ห้องสมุดไป่ตู้
eg. It is a pity that you have missed the wonderful lecture.
英语语法名词性从句精讲1
英语语法名词性从句精讲在复合句中起名词作用的从句叫名词性从句，包括作主语从句、表语从句、宾语从句和同位语从句。
(1)主语从句就是在复合句中作主语的从句。
主语从句常用that, whether, who, whom, whose, what, which, when, where, how, why, whatever, whoever等引导。
如：Whether he will be able to come remains a question. 他是否来还是问题。
That China is a great socialist country is well known. 众所周知，中国是一个伟大的社会主义国家。
注：为避免头重脚轻，使句子平衡，常用it作形式主语，而将主语从句后置。
如上述第二例常说成：It is well known that China is a great socialist country.但是，由连接代词what, whatever, whoever等引导的主语从句一般不能用形式主语。
如：What he found surprised me greatly. 他的发现使我非常吃惊。
Whoever is finished may rest. 凡是做完工的人都可以休息。
(2)表语从句就是在连系动词之后作表语的从句。
引导表语从句的连接除与引导主语从句的连接词外，还有as if，as though。
如：The question is whether he is able to do it alone. 问题是他能否单独做这件事。
It looks as if (though) it is going to snow. 天好像要下雪似的。
注意：要区分以下句式：1. that’s why+结果；that’s because+原因。
2. the reason why /for…is that…He is absent. That’s because he is ill. 他缺席，这是因为他生病了。
(完整版)名词性从句知识点总结
(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。
名词性从句(整理完整版)
名词性从句一、定义：名词性从句在功能上相当于名词，是一个句子分别充任另一个句子的主语、表语、宾语和同位语，由此被称为主语从句，表语从句，宾语从句和同位语从句。
辨别下列从句属于哪种名词性从句并分析：1）Why they haven’t left yet is unclear.2）It was good news that everyone got back safely.3）Polly didn’t know which way she should go.4）I’m interested in who that tall man is.5）We all thought it good news that the fog had finally gone.6）My question is whether Polly can find her way home.7）The fact that Polly didn’t ask for the man’s name is a pity.总结：名词性从句主要由陈述句、大凡疑问句、分外疑问句充任。
1）陈述句充任名词性从句时，由that引导；2）大凡疑问句充任名词性从句时，由if或whether引导从句；3）分外疑问句充任名词性从句时，由疑问词本身做连词引导从句。
4）名词性从句的语序应使用陈述句语序，不可用大凡问句语序。
二、引导名词性从句的从属连词及从句语序1.连接词that；功能1）不充任句子成分2）无词义3）只起连接作用。
2.if/whether;功能：1）意为“是否”，有词义2）不做句子成分3）起连接作用翻译:1）I know that he will come thisevening.___________________________________________2) Whether we will go there or not hasn’t been decided yet.______________________________3.连接代词：what(ever), which(ever), who(ever), whom(ever), whose(ver)功能：1）有词义2）引起从句3）且在从句中充任一定的句子成分，常做从句中的主语、宾语、表语和定语。
名词性从句----绝对经典系列
名词性从句----绝对经典系列名词性从句是在句子中起名词作用的从句，包括主语从句、宾语从句、表语从句和同位语从句。
在高考中，宾语从句是考查最多的，其次是主语从句和表语从句，而同位语从句则很少考查。
名词性从句的连接词有从属连词（如that、whether、if 等）、连接代词（如what、who、whom、whose、which、whatever、whoever、whichever等）和连接副词（如when、where、how、why等）。
主语从句可以直接放在句首，也可以用形式主语It代替，将主语从句放在句子后面。
宾语从句可以充当动词、介词和部分形容词的宾语。
如果宾语从句后面还有宾补，需要使用It作形式宾语，将从句放到宾补后面。
常见的可以接It形式宾语的动词有make、think、find、feel、consider等。
I thought it strange that he didn't call me.This sentence is a complex sentence with a noun clause as the object of the verb "thought"。
The sentence is grammatically correct and needs no further n.We were excited when we heard that he had passed the exam。
The young man's past as a prisoner astonished her。
Everyone was amazed by the unbelievable fact。
The n of who helped us out of difficulty remains unanswered。
The n he asked also remains unanswered.When it comes to noun clauses。
名词性从句(整理完整版)
名词性从句一、定义：名词性从句在功能上相当于名词，是一个句子分别充当另一个句子的主语、表语、宾语和同位语，由此被称为主语从句，表语从句，宾语从句和同位语从句。
辨别下列从句属于哪种名词性从句并分析：1）Why they haven’t left yet is unclear.2）It was good news that everyone got back safely.3）Polly didn’t know which way she should go.4）I’m interested in who that tall man is.5）We all thought it good news that the fog had finally gone.6）My question is whether Polly can find her way home.7）The fact that Polly didn’t ask for the man’s name is a pity.总结：名词性从句主要由陈述句、一般疑问句、特殊疑问句充当。
1）陈述句充当名词性从句时，由that引导；2）一般疑问句充当名词性从句时，由if或whether引导从句；3）特殊疑问句充当名词性从句时，由疑问词本身做连词引导从句。
4）名词性从句的语序应使用陈述句语序，不可用一般问句语序。
二、引导名词性从句的从属连词及从句语序1.连接词that；功能1）不充当句子成分2）无词义3）只起连接作用。
2.if/whether;功能：1）意为“是否”，有词义2）不做句子成分3）起连接作用翻译:1）I know that he will come thisevening.___________________________________________2) Whether we will go there or not hasn’t been decided yet.______________________________3.连接代词：what(ever), which(ever), who(ever), whom(ever), whose(ver)功能：1）有词义2）引起从句3）且在从句中充当一定的句子成分，常做从句中的主语、宾语、表语和定语。
高中英语名词性从句精讲
高中英语名词性从句精讲从句是相对于主句而言的,即它是从属于某一个主句,而不能单独作一个句子。
在英语中,主要有三大从句,即名词性从句（包括主语从句,宾语从句,表语从句,同位语从句）、形容词性从句（即定语从句）、副词性从句（即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等）。
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。
引导名词性从句的连接词可分为三类：（1）从属连接：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名词性从句知识点汇总1名词性从句的分类名词性从句，包括四种从句，即主语从句、宾语从句、表语从句、同位语从句。
因为主语、宾语、表语、同位语这四种成分均可以由名词构成，所以这四种从句在主句中都充当了名词的作用，故将这四种从句统称为名词性从句。
如：1.That she will help me made us happy.（主语从句）2.I can understand what he said.（宾语从句）3.This is where I was born.（表语从句）4.The fact that a heavy earthquake happened made me crazy.（同位語从句）2名词性从句的连接词分类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）3连接词 that 在名词性从句中可以省略的三种情况1.it 做形式主语，that引导主语从句时It is said (that) he has been studying abroad.据说他一直在国外学习。
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.
高考英语语法一轮复习——名词性从句
名词性从句Noun Clauses一. 基础定义和连接词1. 名词性从句：就是在句子中起名词作用的从句。
2. 名词性从句包括4种从句：主语从句、宾语从句、表语从句、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。
[判断]以下从句类型：1）The truth is that I have been there. ( )2）The fact that she was late surprised us. ( )3) That he will come is certain. ( )4) I know that he will come. ( )3. 名词性从句的连接词有：从属连词（不做成分）：that （无意义）,whether, if （是否）….连接代词（在从句中做主，宾，表，定）：what, who, whom, whose, which, whatever, whoever, whichever连接副词（在从句中做状语）：when, where, how , why二. 名词性从句位置和特点●主语从句：1.可直接放在句首。
2.主语较长时通常用It作形式主语，而将主语从句放在后面。
1). he knows Japanese is known to all.2). surprised me was to see him here .3) he is coming doesn’t matter much.4) It remains a secret they climbed up the mountain.●宾语从句：可做动词,介词和部分（表情感态度的）形容词词的宾语。
I want to know when we will start.Everything depends on whether we have enough time.I’m afraid (that) I have made a mistake.注意：如果宾语从句后面有宾补要使用it 作形式宾语而将从句放到宾补后面。
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）。
名词性从句语法总结(必备4篇)
1.宾语从句，是名词性从句的一种。
在主从复合句中充当宾语，位于及物动词、介词或复合谓语之后的从句称为宾语从句。
宾语从句分为三类：动词的宾语从句，介词的宾语从句和形容词的宾语从句。
2.宾语从句的引导词有三种：(1)以that引导的宾语从句：that引导的宾语从句一般都是由陈述句充当，引导词that没有实际意义，不在从句中作任何成分，that可以省略，而且从句成分齐全，句意完整。
Do you think (that) it will rain? 你认为天会下雨吗?He said (that) he could come on time. 他说他会准时来的。
(2)以whether或if引导的宾语从句：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句转化而来的，变成从句后，语序由原来的倒装语序变成陈述语序。
whether和if意为“是否”。
Let us know whether / if you can finish the work before Friday.请让我们知道你是否能在星期五以前把工作做完。
I don’t care whether you like the story or not.我不在乎你是否喜欢这个故事。
(3)特殊疑问词what/ when/ where/ who等引导的宾语从句：此类宾语从句原来是特殊疑问句，变成宾语从句后要用陈述语序，由wh-开头的疑问词引导。
包括who, whom, whose, what, which等连接代词和where, when, how,why等连接副词，这些引导词有各自的意思，在从句中要作相应的成分，不能省略。
例如：Could you tell me which gate we have to go to?请问我们得走哪个门?He didn’t tell me how long he would stay here.他没有告诉我他要在这里呆多长时间。
【语法讲解】高中英语--名词性从句专题讲解(详细)
注：Itis suggested/advised/ordered/requested/insisted/demanded +that+主语(should)+动词原形+其它。
（why在从句中作原因状语）
When we’ll go for a picnic isn’t known.
（when在从句中作时间状语）
宾语从句
句法功能
1)作动词的宾语
大多数位于及物动词后。
Ihope(that) you can join us in the game.
Idoubt whether/ifhe will come to the wedding.
Whatthey need are a car and some water.
（acar and some water表示复数概念，谓语动词用复数）
2）连接副词when, where, why, how，whenever，however，wherever等在从句中作状语。
Why they suddenly disappeared remains a mystery.
e.g. It is suggested that you(should) spend more time in studying English.
4It+动词（+宾语或状语）+that从句。
常用于这种结构的动词有：
seem
显得
happen
碰巧
matter
重要
occur
出现
完整版)高中英语名词性从句详解
完整版)高中英语名词性从句详解名词性从句可以作为主句的主语、表语、宾语和同位语。
它们分为主语从句、表语从句、宾语从句和同位从句。
宾语从句作为复合句中的主句及物动词的宾语，也可以作为介词或某些形容词的宾语。
它不担任成分，只起连接作用。
连接词可以是从属连词、关系代词、关系副词。
从属连词包括that、whether、if；关系代词包括who、whom、whose、what、which；关系副词包括when、where、why、how。
这些词既担任成分，又起连接作用。
宾语从句的例子有：I think (that) you will like the pictures。
He has e what he wanted to be ten years ago。
I don’t know why Jane was late for school this morning。
The teacher is pleased with what she said。
I'm afraid that I can't go to the party.在宾语从句中，由that引导的从句可以省略，但如果从句是并列句时，第二个分句前的that不可省略。
另外，宾语从句中的时态要与主句呼应，如果主句动词是过去时态，从句则要用相应的过去时态。
如果从句表示的是客观真理、科学原理或自然现象，从句仍用现在时态。
如果主语谓语动词为think、consider、suppose、believe、expect、guess、imagine等，其后的宾语从句若含有否定意义，一般要把否定词转移到主句谓语上，从句谓语用肯定式。
XXX。
It is often said that traveling broadens the mind。
I XXX I was determined to carry out the plan。
I consider it XXX。
(完整版)英语名词性从句知识归纳
名词性从句知识归纳名词性从句是指在句子中相当于名词的从句，主要包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句不是修饰性从句，而是复合句中的主干。
e.g. That the boy failed again in the exam disappointed his mother. （主语从句）I know that he is writing his composition in his room. （宾语从句）The question is how we can finish it on time. （表语从句）The fact that some Chinese are still poor is really a great problem. （同位语从句）一、宾语从句---及物动词、介词、部分形容词（certain, sure, glad, afraid, frightened, happy, pleased, sad, sorry, surprised, upset, satisfied等）后e.g. I believe (that) he is honest. (that不充当从句内的任何成分，一般情况可省略)I’m glad that you are satisfied with your job. (that不充当从句内的任何成分)He doesn’t care if/whether it isn’t a fine day. (if/whether不充当从句内的任何成分) Please tell me what you want. (what充当从句内的宾语)She always thinks of how she can work well.(how充当从句内的状语)I don’t believe whatever he said. (whatever充当从句内的宾语，意为“任何事”)I’ll take whoever wants to go. (whoever从当从句内的主语，意为“任何人”)【宾语从句要点拓展】1. that引导宾语从句时一般可以省略，若由and或or连接两个宾语从句时，第一个从句中的that可以省略，而第二个分句前的that不可省略。
名词性从句全面讲解
名词性从句全面讲解名词性从句是英语中的一种从属从句，它在句中充当名词的功能。
名词性从句可以在句子中作主语、宾语、表语和同位语等，并且可以由不同的引导词引导。
本文将全面讲解名词性从句的基本概念、用法及常见的引导词。
一、名词性从句的概念名词性从句是由一个词或一个词组引导的从句，它在句子中充当名词的角色。
名词性从句通常出现在复杂的句子中，起到连接主句和从句的作用。
名词性从句的引导词有很多种类，常见的有：that, whether, if, what, which, who, whom, whose, when, where, why等。
二、名词性从句的用法名词性从句可以在句子中作不同的成分，下面分别介绍其主要用法。
1. 名词性从句作主语名词性从句可以作为主语来引导句子，常用的引导词有：- That: That he is innocent surprises me.（他是无辜的让我吃惊。
）- Whether/If: Whether he will come or not is uncertain.（他是否会来还不确定。
）- What: What you said is true.（你说的是真的。
）2. 名词性从句作宾语名词性从句可以作为宾语来引导句子，常用的引导词有：- That: I know that he is a doctor.（我知道他是个医生。
）- Whether/If: I wonder whether/if it will rain tomorrow.（我想知道明天是否会下雨。
）- What: I don't understand what he is saying.（我不明白他在说什么。
）3. 名词性从句作表语名词性从句可以作为表语来引导句子，常用的引导词有：- That: The truth is that she is not happy.（事实是她不幸福。
）- Whether/If: The question is whether/if we should go or not.（问题是我们是否应该去。
名词性从句 语法(全)
名词性从句名词性从句指的是在主句中起的作用相当于名词的从句，主要包括主语从句，宾语从句，表语从句，和同位语从句。
1.主语从句（1）主语从句的引导词在句中作主语的从句称为主语从句。
主语从句的引导词主要要有从属连词that, whether, if。
连接带刺what,who,whose,which,whatever,whichever等，连接副词when,where,why,how等。
（2）that引导的主语从句That引导主语从句一般位于句首，有时也用it作形式主语而把that从句后置。
That在从句中不做任何成分，也没有实际意义，只起连接作用。
That he will come to the conference has excited every one of us.That in some countries women are still unequally is unfair.It is likely that there will be a snowstorm tomorrow.It is no wonder that you have achieved so much success.It is reported that the coral reefs are being destroyed.It appears that we won’t be laid off.（3）If/whether 引导的主语从句Whether引导的主语从句可置于句首，但if引导主语从句只能用it作形式主语，而把从句放在句末。
Whether the work can be completed on time is doubtful.= it is doubtful whether/if the work can be completed on time.（4）连接代词和连接副词引导的主语从句连接代词或连接副词引导主语从句时要在从句中作一定的成分，且表好似一定的意义。
(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。
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名词性从句Noun Clauses一.基础定义和连接词1. 名词性从句：就是在句子中起名词作用的从句。
2. 名词性从句包括4种从句：主语从句、宾语从句、表语从句、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。
［判断］以下从句类型：1) The truth is that I have been there.( )2) The fact that she was late surprised us.( )3) That he will come is certa in.( )4) I know that he will come.( )3. 名词性从句的连接词有：从属连词(不做成分)：that (无意义)‘whether, if(是否)….连接代词(在从句中做主,宾，表，定):what, who, whom, whose, which, whatever, whoever, whichever连接副词(在从句中做状语)：whe n, where, how , why二.名词性从句位置和特点主语从句：1.可直接放在句首。
2. 主语较长时通常用It作形式主语，而将主语从句放在后面。
1) . ___ he knows Japaneses known to all.2) . _____ surprised me was to see him here .3) ________ he is comingdoesn' t matter much.4) It remains a secret _____ they climbed up the mountain.宾语从句：可做动词，介词和部分(表情感态度的)形容词词的宾语。
I want to know whe n we will start.Everyth ing depe nds on whether we have eno ugh time.I ' imfraid (that) I have made a mistake.注意：如果宾语从句后面有宾补要使用it作形式宾语而将从句放到宾补后面。
常见的可以接it形式宾语的动词有：make, think, find, feel, consider等He made it clear that he was determined to resign .I thought it strange that he didn ' t call me.表语从句：1. 位于系动词动词之后。
常见此类系动词有be, look , seem,即pear等It seems that she has known the truth.It looks as if it is going to rain.This school is no Ion ger what it was before.2. 主语是reason时，表语从句常用that引导，不用because引导。
The reason for his absenee was _____ he was ill.3. 表语从句可以用as if, as though,和because引导.It seemed as if he had done someth ing great.That is because he has got lost.4. 注意下面句型的习惯译法：This is whereLu Xun once lived. _______________________That was how they won the match. ______________________This is whyshe got up so early this morning. _____________________同位语从句：1. 位于名词之后，通常为含义，概念名词，解释说明它的含义和内容。
这样的名词有：belief, fact, hope, idea, doubt, news ,conclusion, problem, information, opinion, promise, truth, suggesti on …2. 同位语从句与定语从句的区别：1 )从意义上讲前者对名词加以补充说明，后者对名词加以修饰和限定。
2 )同位语从句的引导词不可省略，定语从句的引导词有时可省略。
3)同位语从句的引导词that在从句中不充当任何成分，定语从句的引导词在从句中必须充当一定成分。
判断下面从句类型：We were excited about the n ews (that) he had told us. ( )We were excited about the news that he had passed the exam.( )The fact that the young man had bee n a pris oner ast on ished her .( )The fact that was un believable ast oni shed every one.( )The question who helped us out of difficulty remains to be answered.( )The questi on which he asked remai ns to be an swered.( )三.名词性从句的主要考点1.名词性从句要用陈述语序。
尤其是含疑问意义的wh-类的词引出的从句要倍加注意、。
Why was she cryingI don ' t know why he was crying.引导宾语语从句时可省略，引导其他从句一般不可省略。
［判断］下面那个that可以省略1) I know that he will come soon.2) That they are good at English is known to us all.3) The problem i s that we don ' t have enough money.4) She expressed the hope that they would come to China one day.［注意］由连词and连接的两个由that引导的宾语从句中，第二个that不省略.He told me (that) he would come and that he would come on time.和if的选择问题A whether能引导所有名词性从句；只能引导宾语从句(也可引导不位于句首的主语从句)B. 介词后的宾语从句只能用whether不能用if 。
C. whether能和or not连用，而if不可以D. whether常与or连用表示一种选择，if不能这样;E. whether也可与动词不定式连用但if不能。
［填空］用whether和if填空1) I don ' t kno ________ he will come.2) I have not decided ________ to go or not.3) _____________________ It all depends on they will come back. 引导名词性从句时可有两种意义：保持原有的疑问意义，表示什么”。
I don ' t know what he wants. 表示“…的东西，…..的事情”。
That' s what he wants.5. who引导的名词性从句译为谁…的事”---指事。
Whoever引导的名词性从句译为任何…的人”---指人。
［翻译句子］.Who will be sent there has ncTedd e di nWhoever will be sent there will be paid a lot. ____________________6 which和what引导定语从句的区别：Which有范围，表示一定范围内的哪一个…”What没有范围，直接翻译成什么….”.I don ' t know what you want. ______________There are two books. Can you tell me which you want _________________7.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 ___________ (do) want to know. 她说她不想知道。
I asked her whether she ____________ (will) agree.我问她是否会同意2. when, if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 don ' t know when he will come, but when he comes, I ' ll call you.句中第一个when引导的是_______ 从句，故用将来时态表示将来意义；第二个when引导的是_________ 从句，故用一般现在时表示将来意义。