1. 主语从句
英语所有从句大全(1)
英语所有从句大全(1)英语中的从句是指不能独立存在的句子，需要依附于主句才能表达完整意义的句子。
从句分为名词性从句、形容词性从句和副词性从句三类。
下面是英语所有从句的大全。
一、名词性从句名词性从句在句子中担任名词的作用，可作主语、宾语、表语和同位语等，常用连词包括that, whether/if, what, who, whom, whose, how, when, where等。
1. 主语从句主语从句在句子中作主语，例句：What he says is right.2. 宾语从句宾语从句在句子中作宾语，例句：I don't know where he lives.3. 表语从句表语从句在句子中作表语，例句：The fact is that he doesn't care.4. 同位语从句同位语从句在句子中作同位语，例句：The news that the project was cancelled was a surprise.二、形容词性从句形容词性从句在句子中作定语，修饰名词或代词，常用连词包括that, which, who, whom, whose等。
1. 定语从句定语从句在句子中作定语，例句：A person who loves music will enjoy the concert.2. 条件从句条件从句在句子中作条件，一般用if, unless等连接词，例句：Unless you study hard, you won't pass the exam.三、副词性从句副词性从句在句子中作状语，修饰动词、形容词、副词等，常用连词包括that, if, whether, why, when, where, how, as, because等。
1. 时间状语从句时间状语从句在句子中作时间状语，例句：I will see you when I come back.2. 地点状语从句地点状语从句在句子中作地点状语，例句：He sat where there was shade.3. 原因状语从句原因状语从句在句子中表示原因，例句：He didn't go to work because he was sick.4. 目的状语从句目的状语从句在句子中表示目的，例句：I'm studying hard so that I can get good grades.5. 结果状语从句结果状语从句在句子中表示结果，例句：He is so clever that he can solve the problem.6. 让步状语从句让步状语从句在句子中表示让步，例句：Although he is poor, he is happy.7. 比较状语从句比较状语从句在句子中表示比较，例句：He is taller than I am.8. 方式状语从句方式状语从句在句子中表示方式，例句：He works as if he is the boss.9. 条件状语从句条件状语从句在句子中表示条件，例句：If you study hard, you will pass the exam.四、从句的语序和时态从句中的语序和时态要根据主句来变化。
1.主语从句
the Complex Sentence复合句概述如果一个句子是有两个或两个以上的具有从属关系的句子组成，这个句子就称为复合句。
其中一个句子充当主句，另一个句子充当主句的某个成分，充当什么成分就称之为什么从句。
由句子作主句的主语就叫作主语从句，作宾语就叫作宾语从句，以此类推。
1.名词性从句主语从句宾语从句表语从句同位语从句2.形容词性从句——定语从句3.副词性从句——状语从句从句共分为三种类型：1. 主语从句主语从句有三种类型：➢that引导➢连接代词、副词引导➢关系代词what或whatever引导1.1 由that引导的主语从句主语从句通常由it作形式主语，将that引导的从句置于句尾。
that在句首时不能省略，但在it作形式主语时，后置的从句中的that在口语中有时省略。
1.1 由that引导的主语从句一般情况下把主语从句放在句首是很少见的，除非为了强调或谓语太长时才作这样的安排。
例如：That she became an artist surprised all of us.It surprised all of us that she became an artist.她成为一名艺术家，这使大家很惊讶。
1.1 由that引导的主语从句①It+be+形容词/名词+that从句例如：It is certain that we will win the game.我们肯定会赢这场比赛。
It is a pity that you can’t come to the party.真遗憾你不能来参加聚会。
1.1 由that引导的主语从句①It+be+形容词/名词+that从句➢注意：在这种结构中，还可以用“虚拟语气（should）+动词原形”的结构，表示惊讶、惋惜、不相信等。
should常被省略。
1.1 由that引导的主语从句①It+be+形容词/名词+that从句➢注意：常用于这种结构的形容词：important、necessary、natural、desirable、strange、advisable…名词：pity、shame…1.1 由that 引导的主语从句➢注意：①It+be+形容词/名词+that 从句例如：It is necessary that he (should) buy a dictionary.他有必要买本词典。
【高中英语】高中英语知识点：主语从句
【高中英语】高中英语知识点：主语从句主语从句的概念：如果一个句子在复合句中充当一个主语，那么这个句子就是主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，whichwhatever，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。
主语从句用法：1、主语从句的引导词：主语从句通常由连词that和whether、相连接代词或相连接副词以及关系代词型what鼓励：如：thatheisstillaliveisawonder.他还活着，真是奇迹。
whenwearrivedoesn'tmatter.什么时候至没关系。
whatweneedismoney.我们需要的是钱。
whatiwanttoknowisthis.我想要晓得的就是这一点。
whethertheywouldsupportuswasaproblem.他们是否会支持我们还是一个问题。
2、主语从句与形式主语it：有时为了考虑句子平衡，通常在主语从句处使用形式主语it，而将真正的主语从句移至句末。
这分三种情况：(1)对于以连词that鼓励的主语从句，通常用形式主语代主语从句：(2)对于以连接代词(副词)引导的主语从句，可以使用形式主语代主语从句，也可直接在句首使用主语从句：例如：whethertheywouldsupportuswasaproblem.他们与否可以积极支持我们还是一个问题。
itwasaproblemwhethertheywouldsupportus.他们是否会支持我们还是一个问题。
(3)对关系代词型what鼓励的主语从句，通常不必形式主语，总是主语从句放到句首：如：whatweneedismoney.我们需要的是钱。
whatiwanttoknowisthis.我想要晓得的就是这一点。
(4)如果句子是疑问句，则必须用带形式主语it的结构：例如：isittruethatheisthegirl'sfather?他就是那女孩的父亲，就是真的吗？howisitthatyouarelateagain?你怎么又迟到了？3、连词that的省略问题：引导主语从句的连词that有时可省，有时不能省，其原则是：若that鼓励的主语从句轻易坐落于句首，则that无法省略；若that引导的主语从句位于句末，而在句首使用了形式主语it，则that则可以省略：例如：thatyoudidn'tgotothetalkwasapity.很惋惜你没回去听到报告。
高中英语固定句型大全
高中英语固定句型大全一、名词性从句1. 主语从句It + be + adj. (important, necessary, etc.) + that + 主语从句例如：It is important that we protect the environment.It is necessary that you pay attention to your health.2. 宾语从句主语 + 谓语 + that + 从句例如：I believe that he will pass the exam.They know that she is a talented singer.部分动词后面可接不定式或宾语从句，含义相同，如：believe, think, expect, hope, want, wish, imagine, suppose, fear, suggest, order, prefer, advise, tell, remind, ask, teach, show等。
3. 表语从句主语 + be + adj. (sure, certain, true, clear, etc.) + that/whether + 从句例如：The problem is that he doesn't have enough money.The question is whether we should take immediate action.部分形容词后面可以接不定式或表语从句，表示主观判断或意愿，如：glad, happy, sorry, sad, surprised, shocked, unhappy, wise, certain, likely, possible, etc.4. 同位语从句名词 + that + 从句例如：The fact that she passed the exam made her happy.The news that he got a promotion pleased his parents.二、形容词和副词1. 形容词的比较级和最高级比较级：主语 + be (am, is, are) + 形容词比较级 + than + 被比较的对象例如：She is taller than her sister.This book is more interesting than that one.最高级：主语 + be (am, is, are) + the + 形容词最高级 + 名词例如：He is the tallest boy in his class.This is the most beautiful painting I have ever seen.2. 常用的形容词和副词beautiful, handsome, pretty, ugly, lovely, attractive, stunning, gorgeous, charming, cute, elegant, fashionable, stylish, glamorous, delightful, etc.good, great, excellent, wonderful, fantastic, fabulous, amazing, awesome, splendid, terrific, marvelous, etc.bad, terrible, awful, horrible, unpleasant, etc.expensive, cheap, reasonable, affordable, etc.fast, slow, quick, rapid, swift, etc.loud, quiet, noisy, etc.hard, easy, difficult, challenging, simple, complicated, complex, etc.high, low, tall, short, long, big, small, huge, tiny, etc.young, old, new, ancient, modern, etc.3. 形容词和副词的用法形容词可修饰名词，也可作表语副词一般修饰动词、形容词或其他副词三、倒装句1. 完全倒装句在以下情况下要使用完全倒装句：a) 句首为表示地点、方式等的介词短语时例如：Under the tree were two cats.In this way, we can solve the problem.b) 句首为表示方位的副词或介词短语时例如：Here comes the bus.Out rushed the students.c) 句首为表示否定、副词only、hardly, seldom, never等时例如：Never have I seen such a beautiful sunset.Not only does he play the piano well, but he also sings well.d) 句首为so, neither, nor时例如：So busy was he that he forgot to eat lunch.Neither do I like English, nor do I like math.2. 部分倒装句在以下情况下要使用部分倒装句：a) 句首为表示条件的介词短语时例如：Should you need any help, please let me know.Had I known your address, I would have sent you a postcard.b) 句首为表示时间的介词短语或副词短语时例如：At no time should you give up your dream.On no account can he stay out late.四、虚拟语气1. 条件句中的虚拟语气a) “与事实相反的条件句”：如果对过去的情况进行虚拟，主句要用“动词的过去完成时”，从句用“动词的过去完成时”或“would/could/might + have + 过去分词”的形式。
高中英语语法之名词性从句-(1)
5. “疑问词+ever” whatever, whichever, whoever, whomever 引导宾语从句 I’ll show you whatever you want to see. He likes to makes friends with whoever shares his interest.
二、注意正确使用时态
1. 如果主句是一般现在时、一般将来时或祈使句时，宾 语从句时态不受限制 I hear he is here today/ he was here yesterday/ he will be here tomorrow. 2. 如果主句是一般过去时，宾语从句应与主句保持一致， 即使用过去时态的某种形式。 He said he was watching TV/ he had swept the floor/ he would play football after school. 3. 如果宾语从句所叙述的是客观事实、自然现象、科学 真理等时，从句不受主句限制，用一般现在时。 Everyone answered there are sixty minutes in an hour.
• 2.引导主语从句的词： • 连词：that, whether
起连接作用不充当成分
• 连接代词：what(ever),who(ever), which(ever)，whose,
充当主语/宾语/定语等
• 连接副词：when, where, how ,why
充当状语表时间、地点、方式、原因
连接副词：when, where, how ,why引导的主语从句
1.I hear (that)___________.(一小时后会回来)
2.He said (that)___________.(他非常想我们) 3.The teacher told us (that)_____________. (地球围绕太阳转）
初中英语语法-英语从句总结
初中英语语法总结（从句）英语从句三大类型按一般说法，可分为三大类14种从句。
一,名词性从句1主语从句Whether it’s right or not remains to be seen。
2宾语从句I wonder whether it's right or not.3同位语从句This is a question whether it's right or not. 4表语从句The question is whether it's right or not。
二，定语从句1限定性定语从句She is the student who can speak English well。
2非限定性定语从句She is the student, who can speak English well。
三,状语从句1时间状语从句The fact will come out when he comes here。
2地点状语从句You can go wherever you like。
3原因状语从句Pay more attention to your lessons because you are astudent。
4方式状语从句He walks as if he were a king.5目的状语从句She went to Japan so that she could learn Japanese well. 6结果状语从句She went to Japan so that she learned Japanese well.7条件状语从句I will understand it if he tells me.8让步状语从句He knows a lot though he is little.1．定语从句There are some old books in the box.The boy dressed in blue is from America。
【英语知识点】名词性从句语法总结归纳
【英语知识点】名词性从句语法总结归纳名词性从句是在句子中起名词作用的句子。
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。
接下来分享名词性从句的语法，供参考。
1.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、whichever等。
③连接副词how、when、where、why等。
that在句中无词义，只起连接作用;连接代词和连接副词都在句中既保留自己的疑问含义、又起连接作用，连接代词主要作主语，宾语，表语，定语等，连接副词在从句中作状语。
注：whom、who指人，what指物，whatever、whoever表示泛指意义。
2.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：It's a great pity that they didn't getmarried.他们没能结婚，真是令人惋惜。
(2)It be+形容词+that从句：It's splendid that you passed yourexam.你通过考试了，真棒。
(3)It be+动词的过去分词+主语从句：It's said that he has been there many times.据说他去过那儿很多次。
(4)It+不及物动词+that 从句：It is suggested (requested, proposed, desired, etc.) that…。
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。
考研英语语法：学会辨认六类从句
考研英语语法：学会辨认六类从句从句类型在英语中，经常使用的从句有以下六类：1. 主语从句：一个句子在整个句子中充当主语的成分，该句子被称为主语从句。
2. 宾语从句：一个句子在整个句子中充当宾语的成分，该句子被称为宾语从句。
3. 表语从句：一个句子在整个句子中充当表语的成分，该句子被称为表语从句。
4. 定语从句：一个句子在整个句子中充当定语的成分，该句子被称为定语从句。
5. 状语从句：一个句子在整个句子中充当状语的成分，该句子被称为状语从句。
6. 同位语从句：一个句子在整个句子中充当同位语的成分，该句子被称为同位语从句。
►从句的辨认如果想辨认从句类型，学生们应该对从句的基本形式有所认识。
无论是哪种从句类型，在句子中充当成分的"句子"应该都具备以下特征：从句=从属连词+句子了解了从句的基本结构，那么应该如何辨别从句类型呢?学生可以在句子中通过简单的公式进行辨认。
常见的从句出现形式有四类：1. 名词+从属连词+句子=定语从句/同位语从句2. 动词+从属连词+句子=宾语从句/表语从句3. ×+从属连词+句子=状语从句4. 从属连词+句子+动词=主语从句对于以上四类从句出现形式有了一定的了解，那么今天就首先看看第一类从句出现形式的辨认方法和注意事项吧!1. 名词+从属连词+句子=定语从句/同位语从句例子1：Yet, being friendly is a virtue that many Americans value highly and expect from both neighbors and strangers.(1997年Text2)从句类型：定语从句辨别方式：a virtue(名词)+that(从属连词)+many Americans value highly and expect from both neighbors and strangers(句子)译文：然而，表示友好是一种美德，美国人高度重视这种美德，并期望邻居和陌生人都能有这种美德。
高中英语语法(2)主语从句[1]
![高中英语语法(2)主语从句[1]](https://img.taocdn.com/s3/m/56caf97b1711cc7931b716da.png)
高中英语语法（2）主语从句★背诵要点：1、主语从句是指主语用一个从句来表达的句子，也就是说在谓语动词前面的部分是一个从句的句子是主语从句。
2、主语从句的引导词有：1）连词：that, whether2）连接代词：who, what, which, whose, whom3）连接副词：where, when, how, why3、主语从句使用正常主谓语序，不能用倒装语序。
4、通常主语从句用形式主语it来代替，将从句置于句末。
5、that在主语从句中不能省略。
例如：What he said is hard to understand.Where he has gone is unknown to us all.That you find this exercise difficult is quite natural.It is quite natural that you find this exercise difficult.★注意要点：1、引导词that与whatwhat既有引导主语从句的作用,同时又在从句中作成分,这时what相当于all that或everything that...,常译成"所……的(东西、事情、话等.)";而that只起连接作用,本身无实际意义,在从句中也不担当任何成分.但that引导的主语从句放在句首时,不能省略that.例如:What is done can't be undone. (谚语) 已成定局, 无可挽回.2、引导词if和whether表示是否的意思时，不能用if代替whether.It hasn't been decided whether he'll come or not.Whether he'll come or not hasn't been decided.3、熟记以下变化Whoever=no matter who=any one whoWhichever=no matter which=any one whichWhatever=no matter what=anything that★基础题练习：1．_______your father wants to know is________ getting on with your studies.A. What; how are youB. That；how you areC. How；that you areD. What；how you are2. The trouble is ___we are short of tools.A. whatB. thatC. howD. why that3. America was __________was first called “India” by Co lumbus.A. whatB. whereC. the placeD. there where4. China is becoming stronger and stronger. It is no longer_________ .A. what it used to beB. what it was used to beingC. what it used to beingD. what it was used to be5. ________he really means is ________he disagrees with us.A. What …thatB. That …whatC. What …whatD. That …what6. The energy is ________ makes the cells able to do their work.A. thatB. whichC. whatD. such7. All ___ you told me yesterday was serious.A whatB whichC thatD why8. ____ we need more chances to practice speaking English is quite clear.A ThatB /C WhetherD What9. ____ that air tickets are more expensive that bus tickets.A As we all knowB As it known to allC It is known to allD Which we all know10. Where and when ___ there hasn’t been decided.A shall we goB we wentC we shall goD did we go11. It is hard to say __ money you are allowed to take.A whateverB how muchC whenD where12. Whether we will go out for a walk ___ the weather.A depends onB dependsC reliesD rely on13 I took it for granted ____ you would stay with us.A whichB whyC whetherD that14. It seems ____ he has never been paid the money.A thatB howC asD even though15. ______ there is another chance for you to try.A It is saidB It is said thatC He saidD You are said16. It is impossible ____ he misunderstood _____ I said.A that; whatB that; thatC what; thatD /; what★提高题：1.___ most students couldn’t understand is ____ their teacher changed his mind at the eleven hour.A That; thatB Which; whatC What; whatD What; why2. _____ that the whole nation is in a complete mess.A To reportB It is reportedC ReportingD Reported3. ____ was once considered impossible has now become reality.A WhatB ThatC ItD Something4. ___ on Sunday will depend on the weather in the coming few days.A That we go outB Whether we go out or notC If we go out or notD That if we go out or not5. ___ the committee has proposed and how it has been carried out ___ agree.A What; don’tB How; don’tC What; doesn’tD How; doesn’t6. __ he miss ed the flight was the real reason ___ he didn’t attend the meeting on the first day.A That; thatB When; thatC That; whyD When; why★翻译：1、他刚才所说的话似乎很有道理。
英语八大从句类型与用法总结 有哪些从句
英语八大从句类型与用法总结有哪些从句英语有六种从句类型，分别是主语从句、表语从句、宾语从句、同位语从句、定语从句、状语从句。
英语八大从句类型与用法总结有哪些从句1英语从句类型主语从句用作主语的从句叫主语从句。
引导主语从句的关联词有从属连词、疑问代词、疑问副词、缩合连接代词、缩合连接副词等。
表语从句用作表语的从句叫做表语从句。
引导表语从句的关联词与引导主语从句的关联词很多都一样。
宾语从句在句子中起宾语作用的从句叫做宾语从句.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。
同位语从句是名词性从句(主语从句、表语从句、宾语从句、同位语从句)中的主要从句之一，从句作同位语表示与之同位的名词(短语)的实际内容，它的作用相当于名词，对前面的名词(短语)加以补充说明或进一步解释，相当于一个表语从句，它们之间的关系就是同位关系，即主表关系。
定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，所以又称为形容词性从句，一般紧跟在它所修饰的先行词后面。
状语从句可分为：时间状语从句、地点状语从句、原因状语从句、条件状语从句、目的状语从句、让步状语从句、比较状语从句、方式状语从句、结果状语从句。
2英语从句用法1.主语从句1）主语从句可直接位于主语的位置，如果从句较长，谓语又较短，可用it作形式主语，而将从句放在句末。
常见的句型有：2)what引导的主语从句表示“...的东西时”，一般不用it作形式主语。
3)what,who,when,why,whether等词含有各自的疑问意义，但它们引导的主语从句，都用陈述语序。
2.宾语从句1）宾语从句可位于及物动词、介词和某些形容词后。
连词that常可省略。
介词后一般接疑问词引导的宾语从句。
in that(因为),except that(除了),but that(只是）已构成固定搭配，其他介词后一般不接that 引导的宾语从句。
高考英语一轮复习——名词性从句(附答案)
高考英语一轮复习——名词性从句（附答案）I. 考点分析名词性从句包括：主语从句、宾语从句、表语从句、同位语从句，多由连词that，wh- 疑问词或由what，whatever等关系代词引导，其中同位语从句在高考考试中最常见。
1. 主语从句1) 主语从句在句子中充当主语，句子的谓语动词用第三人称单数。
如：Why he refused to work with you is still mystery.Whoever comes is welcome.2) 主语从句前的that不能省略，仅起连接作用，有时为了保持句子平衡，that从句后置，而由it作形式主语。
如：That he became a lawyer may have been due to his mother’s influence.It is not true that he has moved to New York.2. 宾语从句在句子中充当宾语，如：I don’t know where the sound came from.Don’t be satisfied with what you have achieved.3．当从句放在系动词be, look, remain, seem等后即构成表语从句。
The trouble is that I have lost his address.It seemed that the night would never end.4. 1) 同位语从句是对与之同位的名词中心词作进一步解释，能接名词性从句的常见名词有: idea, fact, news, belief, hope, evidence, opinion, problem, truth, answer, proposal, theory, decision, discovery, problem, thought, understanding 等。
名词性从句的翻译技巧
名词在句子中的成分有可能是：主语、宾语、表语、以及同位语。
相应地，名词性从句有四类：主语从句，宾语从句，同位语从句和表语从句。
这四类名词性从句翻译过程中一般都遵循一个原则，如果翻译成汉语句子比较简单，不会造成主句的失衡现象，就可以翻译成从句本来应该承担的成分，进行顺译；但是，如果从句结构较为复杂，而主句较为简单，则适宜把从句单独成句翻译，主句中使用代词指代这个从句。
下面我们来具体看一下翻译方法：1、主语从句：构成主语从句的方式有下列两种：（1）关联词或从属连词位于句首的从句+主句谓语+其他成分。
它们一般是译在句首，作为主从复合句的主语。
这样的词有关联词what，which，how，why，where，who，whatever，whoever，whenever，wherever及从属连词that，whether，if.如：例题1：What he told me was only half-truth.分析：其中关联词可译“…的”，放在后面。
参考译文：他告诉我的只是些半真半假的东西而已。
例题2：Whether an organism is a plant or an animal sometimes taxes the brain of a biologist.分析：whether可以译成“是否，是…还是”，然后适当安排位置。
参考译文：一种生物究竟是植物还是动物，有时使生物学家颇伤脑筋。
（2）it+谓语+that（whether）引导的从句。
如果先译主句，可以顺译为无人称句。
有时也可先译从句，再译主句。
如果先译从句，便可以在主句前加译这。
如：例题3：It can be seen that precleaning alone would not reduce the total sulfur content of the four coals to levels anywhere near the standards.分? 析：这样的句子可以译成无人称句，常用来表示事实，常理等。
高中英语语法：表语从句以及主语从句分析
高中英语语法：表语从句以及主语从句分析英语的语法一直是一个非常重要的成分，是英语学习汇总必不可少的一个基石，在高中英语的学习中，如果能够掌握一个比较全面熟练的语法知识体系，在后续的英语学习过程中会非常容易并且游刃有余，今天就让我们一起来学习关于高中英语语法中的：表语从句以及主语从句吧。
一、表语从句1.定义：用作表语的从句叫做表语从句。
2.构成：关联词+简单句3.引导表语从句的关联词的种类：(1)从属连词that。
如：The trouble is that I have lost his address.麻烦是我把他的地址丢了。
(2)从属连词whether,as,as if。
如：He looked just as he had looked ten years before.他看起来还与十年前一样。
The question is whether they will be able to help us.问题是他们是否能帮我们。
注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句，如：All this was over twenty years ago,but it's as if it was only yesterday.这都是20多年前的事了，但宛如昨天一样。
能跟表语从句的谓语动词一般为系动词be,seem,look等。
如：It looked as if it was going to rain.看起来天要下雨了。
(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever 连接副词where,when,how,why。
如：The problem is who we can get to replace her.问题是我们能找到谁去替换她呢。
The question is how he did it.问题是他是如何做此事的。
怎么看一个句子的主语从句
怎么看一个句子的主语从句主语从句是句子中的一种句子成分，它是一个从句，被用作主语。
主语从句在英语语法中是一个非常重要的句型，因此，能够正确理解和识别主语从句的语法结构，对于学好英语来说非常关键。
本文将介绍如何看懂一个句子中的主语从句，包括5个知识点。
1.主语从句的语法构造在一个句子中，主语从句就是起主语作用的从句，用来说明主语是谁或是什么。
例如：“What he said was true” 这个句子中，“What he said”就是一个主语从句。
主语从句通常由一个连词引导，如that、whether、who、what、why、how等。
通常情况下，主语从句位于整个语句的最前面，跟在句首的助动词和情态动词后面，或者介词后面。
2.主语从句的关键词与大多数从句一样，主语从句中含有主句所缺少的一些信息，因此需要关键词来引导、标识。
主语从句的关键词可以是疑问代词，如what、who、which、whom、whose、when、where、why等。
它们根据不同的上下文，分别表示“什么”、“谁”、“哪一个”、“谁”、“谁的”、“何时”、“哪里”、“为什么”等等问题。
3.主语从句的时态主语从句中的时态通常由主句的动词时态决定，也就是说，主语从句的谓语动词的时态有时要和主句的谓语动词的时态一致。
例如，在一个现在时态句子中，如果主语从句涉及到过去的事件，那么主语从句谓语动词就需要使用过去时态。
4.主语从句的语气主语从句有时也需要掌握正确的语气。
在其他语法结构中，如陈述句、疑问句、祈使句等，英语中有三种语气：陈述语气、疑问语气和祈使语气。
而在主语从句的情况下，通常会使用陈述语气，因为主语从句所讨论的是一个事实或真理，并不需要过多的疑问或命令。
5. 主语从句的位置主语从句的位置通常在主句之前。
但有时候为了强调或者变换句式，主语从句会出现在主句之后。
例如，“It’s a good ideathat you come here.（你来这里是很好的主意。
怎么判断一个句子是主语从句
怎么判断一个句子是主语从句一、主语从句的定义主语从句是一个修饰主语的从句，它通常出现在一个句子的开头或中间，并用来描述或说明主句的主语是什么或是做什么的。
二、主语从句的特点1. 在句子中常常充当主语。
2. 主语从句通常由连词that, whether, if来引导。
3. 主语从句的语序为“主语+谓语”，与陈述句的语序相同。
4. 主语从句中的谓语动词形式应与主句中的谓语动词相对应。
5. 主语从句作为句子中的一个整体，在语法上被视为一个单一的主语。
三、主语从句的分类根据引导主语从句的连词，主语从句可以分为以下几类：1. 用that 引导2. 用whether 或 if 引导3. 用疑问词引导四、如何识别主语从句1. 主语从句位于句首在这种情况下，主语从句通常用来引起整个句子的重要性。
例如：That he speaks several languages is unquestionable.2. 主语从句位于句中在这种情况下，主语从句通常被插入到主句中，以使句子更加清晰和具有强调。
例如：The fact that he passed the exam surprised me.3. 主语从句位于句尾在这种情况下，主语从句通常被用作对句子的总结或归纳，或者是对主句的递进或说明。
例如：It was obvious that the student knew what he was doing.4. 主语从句使用“that”如果主语从句使用“that”引导，那么它很可能是一个主语从句。
例如：That he is a good student is obvious.5. 主语从句使用“whether”或“if”如果主语从句使用“whether”或“if”引导，那么它也很可能是一个主语从句。
例如：Whether he comes or not, we are going to have a good time.6. 主语从句使用疑问词如果主语从句使用疑问词，那么它仅仅是一个疑问句的变种，并不是主语从句。
高考英语从句知识点大全
高考英语从句知识点大全在高考英语中，从句是一个重要的知识点，也是考试中经常涉及的题型。
掌握从句的用法和特点，能够在阅读理解、完形填空以及写作等方面发挥重要的作用。
本文将从不同类型的从句，如名词从句、定语从句和状语从句等，为大家总结整理高考英语从句的知识点。
一、名词从句名词从句是指用来充当主语、宾语、表语或介词宾语的从句。
例如：1. 主语从句：What he said yesterday surprised me. (主语从句作主语)2. 宾语从句：She asked me how I was doing. (宾语从句作宾语)3. 表语从句：The problem is whether we should go or not. (表语从句作表语)4. 介词宾语从句：I am working hard for what I want to achieve. (介词宾语从句作介词宾语)二、定语从句定语从句是用来修饰名词或代词的从句，通常用来说明所修饰的名词的特点、性质或属性。
例如：1. 关系代词引导的定语从句：The book that you borrowed is on my desk. (关系代词that引导的定语从句)2. 关系副词引导的定语从句：I will never forget the day when we first met. (关系副词when引导的定语从句)三、状语从句状语从句是用来修饰主句的句子，在句意上对主句起修饰或补充的作用。
常见的状语从句有时间状语从句、条件状语从句、结果状语从句等。
例如：1. 时间状语从句：I will call you as soon as I finish my homework. (时间状语从句)2. 条件状语从句：If it rains tomorrow, I will stay at home. (条件状语从句)3. 结果状语从句：He was so tired that he fell asleep immediately. (结果状语从句)四、其他类型的从句除了名词从句、定语从句和状语从句之外，高考英语还会涉及其他类型的从句，如目的状语从句、比较状语从句、让步状语从句等。
1. 主语从句 除了连接词that外,还有whether, .
What I have now is /are two books.
2.宾语从句 除了that 外，还可用 whether, if , who, whom, whose, what, which, when, where, how, why 等引导。 eg: He asked whose handwriting was the best. I’m not interested in what he’s saying. This depends on whether he is interested (or not).
注意： （1）某些动词如 insist, suggest, ask, demand, order,advise等，其后宾语从句用虚拟语 气，即 should+动原.
eg: We all insist that we mot rest until we finish the work.
It was demanded that we should set off before daybreak.
1. 主语从句 除了连接词that外，还有whether, what, which, who, whom, whose, when, where, why, how, whatever, whoever 等。 eg: Whether he will go there is not known. What he said is not true. Who broke the window has not been found out.
1. After Yang Liwei succeeded in circling the earth,____ our astronauts desire to do is walking in space.
英语从句1
1 名词性从句 （主语从句，宾语从句，表语从 句，同位语从句） 2 形容词性从句 （定语从句） 3 副词性从句（状语从句）
1）主语从句：由that 引导，that 不能省略。 that 从句可以用it作形式主语放 于句首 what等引导的主语从句不能由 it做形式主语
9 He did more _ was required of him A that B which C than D as
10 She ate just as much _ was good for her. A as B than C that D which
3 It was in Paris _ they met for the first time. A where B that C when D in which
4 This is the girl _ has been highly praised A of whom the painting B the painting of whose C who painting D whose painting
8 Do _right and respect the opinions of others. A what you believe is B that you believe is C which you believe is D which you believe
That the number of participants in the entrance exam for university is decreasing is certain. It is certain that the number of participants in the entrance exam for university is decreasing.
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主语从句( if除外)一定义：在复合句中充当主语的句子，叫主语从句；位于句首。
二：读例句，理解句意，思考，分析，总结。
1：连接词that 引导的主语从句：EG:1）That you are so angry bothers me. 你如此生气使我很烦恼。
2）That she survived the accident is a miracle.她在事故中幸免于难简直是奇迹。
3）It was a pity (that) you didn’t go to the talk.很遗憾你没有去听报告。
4）That he has moved to New York is not true.= It is not true that he has moved to New York. 5）That the earth is round is true.= It is true that the earth is round.总结：在连接词that 引导的主语从句中，that ___含义，在句子___做成分，__省。
EX: 1)______ he will succeed is certain. 2) ________ you didn’t go to the park was a pity.3) ______ you will win the medal seems unlikely.2: 连接词whether引导的主语从句。
EG: 1）Whether wild life can be well protected is of great importance.2）Whether Mary really heard him is really doubtful.3）Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。
4）Whether he will come hasn’t been decided.= It hasn’t been decided whether he will come.总结：在连接词whether 引导的主语从句中，whether__含义，____做成分，__ 省。
EX: 1) ______ she is coming or not doesn’t matter too much. 她来不来都无关紧要。
2) ______ they would support us was a problem. 他们是否会支持我们还是一个问题。
3) _______ to hold the meeting has not been discussed.3：在连接代词（who,whom,whose,which,what,whoever,whomever,whichever,whatever）引导的主语从句中。
EG: 1）What is needed for the space trip is careful preparation.2）Who will be sent to carry out the task has been settled.3）Whom she borrowed money from still puzzled me.4）Which side will win is not clear.5）What I want to know is this.6）Whoever breaks the law will be punished.( _____ 从句)= Anyone who breaks the law will be punished . ( _____ 从句)比较：Whoever breaks the law , he should be punished. ( _____ 从句)= No matter who breaks the law, he should be punished. ( _____ 从句)总结：在连接代词引导的主语从句中，连接代词__含义，___成分，做___语、___语、___语，_____ 省。
EX: 1) ___ will go makes no difference.2) ___ kind of food is the best is still not certain.3) _______ comes is welcome. 4) ______ you need is more pratice.5) _____he did is right. 6) _____ killed the scientist remains a question.4: 在连接副词（when, where ,why, how）引导的主语从句。
1)Where we should put it is a problem.2)How we can help the twins will be discussed at the meeting.3)When they ‘ll start the project has not been decided yet.4)Why dinosaurs died out remains a puzzle.5)Why he didn’t come here is not clear to anyone.= It is not clear to anyone why he didn’t come here.6)When they are going to get married remains unknown.= It remains unknown When they are going to get married .总结：在连接副词引导的主语从句中，连接副词___含义,___成分，做___语,____ 省。
EX: 1) ____ he is often late is still unclear.2) ____ they will come hasn’t been made public.,3) _____ it was done remained a mystery.4) ____ he hid the money is to be found out.三：固定句型：（借助形式主语it, 主语从句不能提前）。
1）It is + 名词/ 名词短语（a pity/ shame; a wonder; no wonder; a /no surprise; an honur; good news; a good thing; one’s duty ; a fact）+ that 从句。
It is a fact that... 事实是.... It is good news that.... ....是好消息。
It is a question that... ...是个问题It is common knowledge that... ... 是常识。
EG:It is a mystery to me how it all happened.这一切是怎么发生的是个谜。
It is common knowledge that the whale is not a fish.It is no surprise that Bob should have won the game.It is a wonder that you are leaving.It is a pity that we didn’t go to the Olimpic Games.It’s no surprise that our team should have won the game.我们没赢这场比赛真意外。
2) It is +形容词（strange/necessary/ essential /important;natural;obvious/clear/evident; true/right/wrong;wonderful/good/bad;(im)possible/(un)likely;unusual;certain/doubtful ;surprising/shocking/satonishing;interesting,etc）+that 从句...It is necessary that.... 有必要....It is clear that..... 很清楚....It is likely that.... 很可能.... It is important that ....重要的是......EG: I t is doubtful whether she will be able to come.她是否能来令人怀疑。
It was really astonishing that he refused to talk to you.他拒绝和你说话真是令人惊讶。
It is essential that he should be here by the weekend.周末之前，他应该到这里是必要的。
It is natural that they benefit from each other .It is unlikely that he will come tonight. It is likely that a hurricane will arrive soon.It is necessary that a college student should master at least a foreign language.It seems obvious that we cannot go on like this. It is important that a student learn English well.It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
3）It is +过去分词said;known;expected;believed;thought;hoped;reported;supposed,etc）+that 从句....It is said that ... 据说.... It is reported that ... 据报道......It has been proved that...已证明...EG: It is thought that he is the best player. 大家都认为他是最好的选手。