英文各种从句详解
今天起为大家介绍一下英语中几大从句的用法以及其相关内容， 如果总结地不够详尽的， 还将从句放在句末。
常见的句型有：*lt is a fact ∖ a pity ∖ a questi On ∖good n ews that...*lt seems ∖appears ∖happe ned ∖has turned out that...∣ *lt is clear ∖importa nt ∖likely ∖possible that...*It is said ∖reported ∖estimated ∖has bee n PrOVed that...It is Said that comic books Create a Conn ecti On betwee n people of the Same gen erati on.∣It SeemS that the PerfOrma nce is Very useful.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。
What We lack is experie nce.3) what,who,whe n,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。
How the pla n is to be Carried out should be discussed aga in.I did know Why I felt like crying.To be ContinU ed: 宾语从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。
*I PrOmiSed that I would Cha nge the SitUation. *All this is differe nt from What AmeriCa n young people would Say about frien dship. *He is Certain that WatChing so much television is not good for ChiIdren.*This article is well-written except that it is a bit too long.2) 宾语从句后如有宾补，要用形式宾语 it 来代替，而把宾语从句移至宾补之后。
He has made it clear that he would not Cha nge his mind.3) 在think,believe,suppose,expect 等动词后的宾语从句中，如果谓语是否定的，一般将否 | 定词移至主句谓语上，宾语从句则变成肯定形式。
He did n't think that the money WaS well SPe nt.To be Continued: 表语从句3. 表语从句表语从句出现在结构为 主语+系动词+表语从句”的句子中。
表语从句除可用请各位朋友补充说明，谢谢。
—I1.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，而今天起为大家介绍一下英语中几大从句的用法以及其相关内容，如果总结地不够详尽的，还that,what,when,why,whether,how 等弓丨导外，还可由 because,as if(though) 等弓丨导。
that 常可省略。
如主句主语为 reason,只能用that引导表语从句，不可用 because.PerhaPS the most important thing to remember is that there is no one com mon type of lifein AmeriCa.The reas On Why So many people died there is that there Were not eno Ugh food supplies.It looks as if SUCCeSSfUI intern ati Onal CUItUraI com muni Cati on will make the world smaller.To be Continued: 同位语从句4. 同位语从句同位语从句用于对前面出现的名词作进一步说明，一般用连词that引导，由于先行名词的意义不同，也可用Whether,who,whe n,where,what,why,how 等引导。
常见的先行名词有fact,idea,belief, news,hope,c On clusi on, evide nce,suggesti on,order,problem,report,decisi on.有时由于谓语较短，将同位语从句位于谓语之后。
She fin ally made the decisi On that She would join the fashi On show.I had no idea how many books I could borrow at a time.The n ews Came that their team had won the ChamPi on ship.To be Continued: 定语从句5. 定语从句定语从句所修饰的先行词可以是名词或代词，也可以是一个句子。
定语从句通常位于先行词之后，由关系代词或关系副词引导。
*限制性定语从句限制性定语从句修饰先行词，对先行词起修饰作用，紧接先行词之后，无逗号，若省去，原句意思不完整。
引导定语从句的关系代词有 who,whom,whose,which,that 等。
who,whom,whose 用于指人，whose有时也可指物，相当于of WhiCh ； WhiCh用于指物；that 既可指人也可指物，但只用于限制性定语从句中。
关系代词除了引导定语从句，替代先行词外，还在从句中担任主语、宾语、定语等。
The COmPUterS and CabIeS WhiCh make UP the Internet are OWned by people and orga niz atio ns.Those who live alone or who are SiCk may have trouble in getti ng close to other people.first,last,any,few,much,some,no,only 以及形容词最高级修饰时，只能用关系代词that引导从句。
That is all that rve heard from him.He's the first PerS on that I'm going to in terview this after noon.The girl whose Pare nts died in an accide nt is liv ing With her gra ndmother.1）当先行词是 all,anything,everything,something,nothing 等不定代词或先行词前有first,last,any,few,much,some,no,only 以及形容词最高级修饰时，只能用关系代词that引导从句。
That is all that rve heard from him.He's the first PerS on that I'm going to in terview this after noon.在从句中作宾语的关系代词常可省略。
关系代词紧跟介词，作介词宾语时不可用that ,只可用WhiCh或Whom引导从句，并且不可省略，但当介词位于宾语从句句末时，作为介词宾语的关系代词仍可用that ,也可省略。
ThiS is One of those things With WhiCh We have to PUt up.ThiS is One of those things (WhiCh\that) We have to PUt UP With.3)引导定语从句的关系副词有When,where,why 等。
关系副词在从句中作状语，意义上相当于一个介词+which"的结构。
EVen in comic books Where (=in WhiCh) there are no words,the StOrieS are fully expressed through the draw in gs.No OneknoWS the reas On why（=for WhiCh） he WaS so angry that day.5.定语从句*非限制性定语从句非限制性定语从句既可修饰先行词，也可修饰整个主句，起补充说明作用，与主句之间有逗号隔开，若省去，原句意思不受影响。
不可用that引导非限制性定语从句。
关系词不可省略。
EVery ObjeCt has a gravitatiOnal pull,which is rather like magnetism.*介词whose"引导的定语从句介词whose"可引导限制性定语从句，也可引导非限制性定语从句，该结构中介词的选择取决于从句谓语动词的固定搭配，或先行词的习惯搭配。
ThiS is the COmPUter On WhiCh he SPe nt all his SaV ingsIt is Written by a PerSon With whom We are all familiar.*as引导的定语从句as引导的定语从句主要用于“such...as及”"thesame...as '的结构中，代替先行词是人或物的名词。
as引导非限制性定语从句时，代替整个主句，从句可位于主句之前、之后或中间。
TheSe are not SUCh problems as Can be easily solved.（as 代替先行词 problems）AS is men tio ned above ,no sin gle compa ny Or group Can Con trol What happe ns On the Internet.（as代替主语）To be Continued: 状语从句在从句中作宾语的关系代词常可省略。
英语从句语法知识点归纳
英语从句语法知识点归纳
英语从句的语法知识点主要包括以下内容：
从句的概念：从句是句子中的一个组成部分，通常由一个关联词引导，并在句中充当一个成分。
从句的分类：根据在句子中的作用，从句可以分为名词性从句、形容词性从句和副词性从句。
从句的引导词：从句的引导词分为两大类，即关系词和连接词。
关系词包括that、which、whose等，用于引导名词性从句；连接词包括and、but、or、if、whether等，用于引导形容词性从句或副词性从句。
从句的时态：在大多数情况下，从句的时态要与主句的时态保持一致。
但有时，根据从句的内容和上下文，从句可以使用不同的时态，例如过去完成时或虚拟语气等。
从句的语序：在名词性从句中，语序通常采用陈述句语序，即主语+谓语+其他成分；在形容词性从句中，语序可以采用疑问句语序或陈述句语序。
从句的省略：在某些情况下，从句中的某些成分可以省略，例如当从句的主语和主句的主语一致时，或者当从句的内容已经包含在主句中时。
以上是从句语法知识点的基本内容，需要在学习过程中不断练
习和巩固。
从句知识点总结归纳
从句知识点总结归纳一、从句的定义与分类。
1. 定义。
- 从句是复合句中不能独立成句，但具有主语部分和谓语部分，由that、who、whom、when、why、where、how、which等引导词（Connective）引导的非主句部分。
从句在整个句子中充当一个句子成分。
2. 分类。
- 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。
在句子中起名词作用，可分别作主句的主语、宾语、表语和同位语。
- 形容词性从句（定语从句）- 用来修饰名词或代词，在句中作定语。
- 副词性从句（状语从句）- 在句中作状语，可表示时间、地点、原因、条件、目的、结果、让步、方式等意义。
二、名词性从句。
1. 主语从句。
- 引导词。
- 从属连词：that、whether。
例如：That he will come is certain.（that引导主语从句，在句中不充当成分，只起连接作用）；Whether he will come or notis still a question.（whether表示“是否”，引导主语从句，在句中不充当成分）。
- 连接代词：who、what、which、whom、whose等。
例如：Who will be our monitor hasn't been decided yet.（who在主语从句中作主语）。
- 连接副词：when、where、why、how等。
例如：How we can solve this problem is very important.（how在主语从句中作方式状语）。
- 注意事项。
- 为避免头重脚轻，常用it作形式主语，而将真正的主语从句后置。
例如：It is known to all that the earth goes around the sun.2. 宾语从句。
- 引导词。
- 与主语从句基本相同，从属连词that（可省略）、whether/if；连接代词和连接副词。
英语从句大全及讲解
英语从句大全及讲解
英语从句是英语语法中的重要部分，包括主语从句、宾语从句、表语从句、同位语从句等。
以下是一些英语从句类型及讲解：
1.主语从句：主语从句是一个完整的句子作为主语，引导词有what、who、
whom、whose、which等。
例如：What he said at the meeting was very important.
2.宾语从句：宾语从句是一个完整的句子作为宾语，引导词有that、which、
what、who、whom等。
例如：I don't know who will win the game.
3.表语从句：表语从句是一个完整的句子作为表语，引导词有that、which、
who、whom等。
例如：The problem is who will take care of the children.
4.同位语从句：同位语从句是一个完整的句子作为同位语，引导词有that、
which、who、whom等。
例如：The news that he won the prize made us very happy.
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英语从句知识点总结笔记
英语从句知识点总结笔记一、从句的分类英语中的从句主要包括名词性从句、形容词性从句和副词性从句三种。
1. 名词性从句名词性从句在句中的作用相当于名词，可做主语、宾语、表语或宾语补语。
名词性从句主要包括主语从句、宾语从句、表语从句和同位语从句等。
主语从句：引导词为that, whether, if, who, what, which, whoever, whatever, whichever等。
例如：What he said is true.（他说的话是真的。
）宾语从句：引导词为that, whether, if, who, whom, whose, what, which等。
例如：I know what you mean.（我知道你的意思。
）表语从句：引导词为that, whether, who, whom, whose, what, which等。
例如：The problem is whether we can solve it.（问题是我们能否解决它。
）同位语从句：引导词为that, whether, who, what, which等。
例如：The news that he won the championship pleased everyone.（他赢得了冠军的消息使每个人都很高兴。
）2. 形容词性从句形容词性从句相当于形容词，在句中修饰名词或代词。
形容词性从句的引导词有that, who, whom, whose, which等。
例如：The book that you are reading is interesting.（你正在读的那本书很有趣。
）3. 副词性从句副词性从句相当于副词，在句中修饰动词、形容词、副词等。
副词性从句分为时间状语从句、地点状语从句、原因状语从句、条件状语从句、目的状语从句、结果状语从句等类型。
时间状语从句：引导词有when, while, before, after, since, until, as soon as, whenever, the moment等。
英语三大从句语法讲解
英语三大从句在英语中,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;定语从句一、关系代词引导的定语从句关系代词代替前面的先行词,并且在定语从句中充当句子成分,可以作主语、宾语、定语等;常见的关系代词有：who, that, which;它们的主格、宾格和所有格如下表所示：一关系代词who, whom和 whose的用法who代替人,是主格,在定语从句中作主语;An architect is a person who designs buildings. 建筑师是设计房屋的人;whom代替人,是宾格,在定语从句作宾语,在非正式英语常可省略;Do you know the gentleman whom we met in the school library yesterday 昨天我们在学校图书馆里遇到的那位先生你认识吗whose一般代替人,有时亦可代替物,是所有格,在定语从句作定语; The girl student whose father is a senior engineer used to study abroad. 其父是一位高级工程师的那个女学生过去在国外留学;Do you know the name of the hotel whose window we can see here 我们这儿能看到窗户的那个宾馆叫什么名字,你知道吗关系代词whose指代先行词hotel,正式用法应该用of which;whose window=the window of which,意思是：the window of the hotel; 二关系代词which的用法which代替物,在定语从句作主语或宾语,作宾语时还可省略;I do not like stories which have unhappy endings.我不喜欢有不幸结局的小说;which可以换成that三关系代词that的用法that既可指人又可指物,在当代英语中大多指物,在定语从句作主语或宾语,作宾语时还可省略;：Is she the girl that sells newspapers她是卖报纸的那个女孩吗that可以换成whoWhere is the ice-cream that was in the fridge放在冰箱的冰激凌哪儿去了that可以换成whichIs this the book that you want to buy这是你要买的那本书吗 that可以换成which,在定语从句作宾语,还可以省略二、关系副词引导的定语从句常用的关系副词只有三个：when, where, why,在定语从句中充当时间、地点和原因状语;一关系副词when的用法关系副词when代替的先行词表示的是时间,when在定语从句作时间状语;In Beijing July and August are the months when it rains very often.北京的七月和八月是常下雨的月份;when先行词是months二关系副词where的用法关系副词where代替的先行词表示的是地点,where在定语从句作地点状语;During the Spring Festival I went back to the town where I was brought up.春节期间,我回到了生我养我的家乡;where的先行词是town三关系副词why的用法关系副词why代替的先行词表示的是原因,why在定语从句作原因状语;The reason why I am phoning you is to ask you whether you have got my email.我打电话给你的原因是想问问你是否收到了我的电子邮件;why先行词是reason, 当代英语里why可以用that替代,这时关系代词that 就变成了表示原因的关系副词,还可以将why省略三、特殊关系代词as引导的定语从句一在固定搭配as…as, so…as, such…as, the same…as中,as引导定语从句You may take as many books as you want.你想要拿多少书就拿多少;第一个as是副词,修饰many的；第二个as才是关系代词,代替先行词books,在定语从句中作宾语二独立于主句之外,as引导定语从句As we know/ As is known to us, the earth turns around the sun. 正如我们所知,地球围绕太阳旋转;As we know和 As is known to us均为定语从句,as分别作宾语和主语,替代后面的主句;Taiwan is, as you know, an inseparable part of China.你知道,台湾是中国不可分割的一部分;关系代词as指代整个主句,在定语从句中作宾语;四、关系代词who, which与that的区别一关系代词who与that的区别1. 当关系代词用作主语时,多用主格who;He who loses hope loses all.失去希望的人就失去一切;先行词为代词he, they, any, all, one 等时,多用whoI met Alice, who told me that she was learning Chinese.我遇见艾丽斯,她告诉我她在学汉语;在非限制性定语从句中,用who 2. 当关系代词用作介词后的宾语时,用宾格whom,不用that;The man to whom our headmaster talked just now is our English teacher.我们校长刚才与他谈话的那个人是我们的英语老师;介词与关系代词紧密相连时,只能用宾格whom,不可用主格who注意：介词与关系代词不是紧密相连时,或者说介词放在句子后面时,这时可以用主格who,也可用that,还可以省略关系代词;因此,上面的这句话还可以有如下四种说法：1 The man whom our headmaster talked to just now is our English teacher.2 The man who our headmaster talked to just now is our English teacher.3 The man that our headmaster talked to just now is our English teacher.4 The man our headmaster talked to just now is our English teacher.3. 当关系代词泛指人时,多用that;He is a man that is never afraid of failure.他是个从不怕失败的人;that用来泛指人4. 当关系代词出现在who开头的疑问句时,应用that;例如：Who is the girl that is talking to Tom in English用英语同汤姆交谈的那个女孩是谁避免重复使用who,以免造成误解或语义含混不清二关系代词which与that的区别1. 当先行词为all, much, little以及不定代词anything, something, everything等时,关系代词多用that;All that glitters is not gold. 闪闪发光物,未必尽黄金;She told me everything that she knew. 她把她所知道的一切都告诉了我;2. 当先行词的前面有形容词最高级、序数词或限定词the only, the very, all, every, any, no等时,关系代词一般都用that;This is the best novel that I have ever read. 这是我读过的最好的一部小说;He is the only person that has been invited to the ball. 他是惟一应邀参加舞会的人;3. 当关系代词出现在which开头的疑问句时,应用that;Which was the hotel that was recommended to the foreign guest 哪一个是推荐给外宾的宾馆这里使用that很明显是为了避免重复which4. 在非限制性定语从句中,关系代词一般只用which;Beijing, which is the capital of the People’s Republic of China, will host the 2008 Olympic Games. 北京是中华人民共和国的首都,将主办2008年奥运会;5. 介词后的关系代词用which,而不用that;She has collected 600 stamps, 60% of which are German stamps. 她收集了600张邮票,其中60％是德国邮票;五、定语从句的位置如前所述,定语从句一般总是直接置于所修饰的名词或代词之后;有时候,定语从句与先行词之间插入了其他的短语,这样它们被分隔了,这种情况下的定语从句被称作隔离定语从句;There was a girl upstairs who was shouting and crying, obviously mad.楼上有一个女孩,大喊大叫;很明显,她疯了;定语从句who was shouting and crying修饰the girl,被upstairs所隔开A new master will come tomorrow who will teach you German. 明天要来一位新老师教你们德语了;定语从句置于句末以示强调名词性从句宾语从句一、引导词1由that 引导的陈述句性的宾语从句,在很多动词如say, think, wish , hope, see, believe, agree, expect, hear , feel等动词后;连词that只起连接作用,在从句中不做句子的成分,也无词汇意义,在口语中常被省略;如：I told him that he was wrong.在think, believe, suppose, expect等动词引起的宾语从句中,有时谓语尽管是否定意义,却不用否定形式,而将think 等动词变为否定形式;见语法：否定转移如：I don’t think you are right. 我认为你做的不对在许多带有复合宾语的句子中,that引导的宾语从句经常移到句子的后面,而用it做形式宾语;We think it wrong that he told a lie to everyone 我认为他向每一个人撒谎是错误的2 由连词if、 whether 引导的表示“是否…”的宾语从句; Whether, if 在从句中不做句子的成分,一般情况下,whether和if 可以替换;I don’t know if/whether he will come tomorrow.在介词后面的宾语从句中不用if引导Everything depends on whether we have enough money.宾语从句中有or not时不用if引导.I don’t know whether the movie star will come or not.和不定式连用作宾语时不用if引导Whether to go there or not hasn’t been decided.3由wh-引导的宾语从句;连接代词who, whom, whose, what, which 和连接副词when, where, why, how 等连接的宾语从句,它们在句中即有连接从句的作用,又在句中充当句子的成分;Do you know which film they are talking about which做定语I don’t know where he lives. where 做地点状语二、宾语从句的语序,宾语从句的语序必须是陈述语序,既连接词+主语+谓语+其他成分 I believe that they will come soon.特例：有下列常见的问句,作为从句出现,是“不改变语句顺序”的;1. What's the matter2. What's wrong3. What's up4. What's the problem5. What's your trouble三、宾语从句的时态;宾语从句的时态受主句的限制,即：主句是一般现在时态,从句根据实际情况而定；主句是一般过去时态,从句用相应的过去的时态;如果从句的动作发生在主句之前,则从句要用过去完成时态;1 She says that she is a student.→ She said that she was a student.2She says that she will fly to Japan in a week. → She said that she would fly to Japan in a week.3She says that she has finished her homewor k already. → She said that she had finished her homework already.1如果宾语从句说的是客观真理、自然现象或事实时,这时宾语从句要用一般现在时态;The teacher said that the earth goes round the sun.2Could you tell me…是用来征询对方的意见,语气委婉,并不表示过去;Could you tell me when we will visit the History Museum注意事项：3由陈述句变成宾语从句时,要注意人称的变化;She said: “I have been to England before.” → She said that she had been to England before.She asked me: “Do you like maths” → She asked me if I liked maths.4宾语从句与简单句的交换;由连接代词和连接副词引导的宾语从句,如果宾语从句的主语和主句的主语是同一个人时,可以用“疑问词+不定式”做宾语的简单句结构;I don’t know what I should do next. → I don’t know what to do next.DO SOME EXERCISES:1.Can you see AA. what he’s readingB. what is he readingC. what does he readD. he reads what2. Does Jack come from Japan Do you know合并成一个句子Do you know ___that__Jack __come___from Japan3._What did your son say in the letter_He told me that he_D__ the Disney the next day.A. will visitB. has visitedC. is going to visitD. would visit4. He didn’t know___A____A. what’s the matterB. what the matter isC. what was the matterD. what the matter was5. Somebody called you just now, but I didn’t know__D__A. who were theyB. who they wereC. who was itD. who it was6. I want to know___D__A. what is his n ameB. what’s his nameC. that his name isD. what his name is7. ---Could you tell me __C__she is looking for---Her cousin, Susan.A. thatB. whose C .who D. which8. ---What are you searching the Internet for---I’m trying to find out____.A. What is the difference between SARS and BIRDFLUB. How many persons have died in IraqC. How to protect our environmentD. Why is our Chinese team be able to beat Korea同位语从句一一般来说,在主从复合句中,用作同位语的从句叫同位语从句;它通常跟在某些名词之后,用以说明或解释该名词表示的具体内容;可以跟同位语从句的名词通常有：advice, decision, fact, hope, idea, information, message, news, promise, proposal, reply, report, suggestion, word消息,problem, question, doubt, thought等; eg: They were delighted at the news that their team had won.当听到他们队获胜的消息时,他们欣喜若狂;有时同位语从句可以不紧跟在被说明的名词后面,而被别的词隔开; 如：The thought came to him that Tom might have returned the book. 他突然想起汤姆可能已经还了书了;二引导词1. The news that Mr. Li will be our new English teacher is true.2. He hasn’t made the decision whether he will go there.3. The question who should do the work is being discussed at the meeting.4. I have no idea what the boy is doing in the next room now.5. We haven’t yet settled the question where we are going to spend our summer vacation this year.6. I have no idea how I can get to the railway station.7. I have no idea when he will be back．小结：① that引导同位语从句时无词义,也不充当任何成分,但通常不可以省略,如句1；② whether引导同位语从句时意为“是否”,通常不能用if来代替, 如句2;③ 连接代词who, what等可以引导同位语从句,如句3, 4；④ 连接副词where, how, when等可以引导同位语从句, 如句5,6,7;三 that 引导的同位语从句和定语从句① 意义不同：同位语从句用来进一步说明前面名词的内容；而定语从句用来修饰、限定前面的先行词;试比较：1. The news that our team has won the final match isencouraging.2. The news that you told us is really encouraging.② that的功能不同：that引导同位语从句时是一个纯连词,不充当任何成分；而引导定语从句时,不仅起连接作用,而且还指代先行词并在从句中充当主语、宾语等成分;试比较：1. Dad made a promise that he would buy me a CD player ifI passed the English test.2. Dad made a promise that excited all his children.③ 可否省略：that在引导同位语从句时,通常不可省略;在引导定语从句时,若在从句中作宾语,通常可以省略,若作主语则不可以省略;DO SOME EXERCISES:I. 请用适当的词填空,使下列句子意思完整;1. They expressed the hope _that_ they would come over toChina soon.2. The fact ___that____ he didn’t see Tom this morning istrue.3. Word has come __where_____ some American guests will cometo our college for a visit next week.4. He can’t answer the question ___how____ he got the moneyfrom his home yesterday.5. Do you have any idea __what___ is actually going on inthe classroom6. The problem _______ we should have the meeting in the hallnow must be decided at once.II. 下列各句中均有一处错误,请改正;1. Our team has won the game, that made us very happy.2. I’ve come with a message from Mr Wang how he won’t beable to see you this afternoon.3. He must answer the question if he agrees with what shesaid or not.4. I’ve read the book where you gave me the day beforeyesterday. 5. One of the men held the opinion when what the book said was right.表语从句表语从句只能置于主句之后,而主句的动词只能是连系动词;名词性从句在be等系动词后作表语时被称为表语从句The problem is how we can get the things we need.问题是我们怎样能弄到我们需要的东西;how 在表语从句中充当方式状语The scissors are not what I need. 这把剪刀不是我所需要的;what 在表语从句中充当宾语What I told him was that I would find him a good play. 我告诉他的是我会给他找个好剧本;what在主语从句中作直接宾语, that 作为表语从句的引导词在该表语从句中不充当句子成分, 不能省略That is what I want to tell you.那就是我想要对你讲的;what在表语从句中充当直接宾语That is why she failed to pass the exam. 那就是她考试不及格的原因;why 在表语从句中充当原因状语“That is why...”是常用句型, 意为“这就是……的原因/因此……”, 其中why引导的名词性从句在句中作表语, 该句型通常用于针对前面已经说明过的原因进行总结下面是两个与“That is why...”形式相似的结构, 它们与“That is why...”结构之间的关系要能够辨析清楚：1“That is why...”与“That is the reason why...”同义, 只不过从语法结构上讲, “That is the reason why...”中why引导的是—个定语从句, 将其中的the reason去掉则与“That is why...”结构一样 That is the reason why I cannot agree.2“That is because...”句型中从属连词because引导的名词性从句在此作表语, 这也是个常用句型, 意为“这就是为什么……/因为……”;“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由, “That is why...”则指由于各种原因所造成的后果He did not see the film last night. That is because he had to help his little sister with her homework.昨天晚上他没有去看电影, 那是因为他得帮助他的妹妹做作业;第一句话说明结果, 第二句话说明原因He had seen the film before. That is why he did not seeit last night.他以前曾看过那部电影, 因此他昨天晚上没有去看;第一句话说明原因, 第二句话说明结果考题1The traditional view is ____ we sleep because our brain is “programmed” to make us do so. 2007上海A. whenB. whyC. whetherD. that考题2You are saying that everyone should be equal, and this is ____ I disagree. 2004A. whyB. whereC. whatD. how考题3— I drove to Zhuhai for the air show last week.— Is that ____ you had a few days off 1999A. whyB. whenC. whatD. where考题4____ made the school proud was ____ more than 90% of the students had been admitted to key universities. 2003上海春A. What; becauseB. What; thatC. That; whatD. That; because考题5—Are you still thinking about yesterday’s game—Oh, that’s ____. 2003北京春A. what makes me feel excitedB. whatever I feel excited aboutC. how I feel about itD. when I feel excited 表语从句与宾语从句的关系宾语从句和表语从句都属于名词性从句;其作用跟名词在句中的作用相同;故充当宾语的句子叫宾语从句,充当表语的句子叫表语从句;宾语从句1对于宾语从句要掌握以下三点①语序: 从句的语序必须是陈述句语序, 即“主语 + 谓语”这种形式;②时态: 当主句是一般现在时或一般将来时的时候, 从句可以是任何时态, 而当主句是一般过去时的时候, 从句时态必须是过去时范围的时态, 即一般过去时, 过去进行时, 过去完成时, 过去将来时;③连接词: 当从句意思完整, 主句意思肯定时, 连接词用that, 且可以省去当从句意思完整, 主句意思不确定或含否定含意时, 常用if或whether是否当从句意思不完整时, 连接词则是代替不完整部分的特殊疑问词;表语从句在句子中起表语作用的从句叫做表语从句,位于主句系动词的后面;表语从句的引导词和主语从句的引导词相同;也是名词性从句的一种;What the police want to know is when you entered the room.警察想知道的是你什么时候进的房间;The trouble is that we are short of funds困难是我们缺乏资金; This is what we should do这是我们应当做的;That is why I want you to work there那就是我要你在那儿工作的原因;His first question was whether Mr. Smith had arrived yet他的第一个问题是史密斯先生到了没有; 从句中的疑问句用正常语序,即陈述语序;as if, as though, because也可用来引导表语从句;She seems as if she had done a great thing她看起来好像做了一件大事;It is because you eat too much那是因为你吃得太多了;状语从句一状语从句的种类1.时间状语从句2.地点状语从句；3.原因状语从句；4.条件状语从句；5.目的状语从句；6.让步状语从句；7比较状语从句；8.程度状语从句；9.方式状语从句；10.结果状语从句;二状语从句的时态一般情况下,时间和条件状语从句的谓语动词一般用“一般现在时”表示“一般将来时”,用“现在完成时”表示“将来完成时”;1时间状语从句1.由when, while, as引导的时间状语从句;when, while和as的区别：when引导的从句的谓语动词可以是延续性的动词,又可以是瞬时动词;并且when有时表示“就在那时”; While引导的从句的谓语动作必须是延续性的,并强调主句和从句的动作同时发生或者相对应;并且while有时还可以表示对比;While my wife was reading the newspaper, I was watching TV. As表示“一边……一边”,as引导的动作是延续性的动作,一般用于主句和从句动作同时发生；as也可以强调“一先一后;As we was going out, it began to snow.当我们出门时,开始下雪了;as强调句中两个动作紧接着先后发生,而不强调开始下雪的特定时间2.由before和after引导的时间状语从句;before引导的从句不再用否定式的谓语,并且当before引导的从句位于主句之后,有时译成“就,才”; 时态：当主句用将来时,从句总是用现在时；如果before引导的从句谓语用的是过去时,则主句动词多用过去完成时,这样以便体现动作发生的先后;After表示主句动作发生在从句动作之后;主句和从句的动作的时间关系正好与before引导的从句相反;3.由till或until引导的时间状语从句;till和until一般情况下两者可以互换,但是在强调句型中多用until;并且要注意的是：如果主句中的谓语动词是瞬时动词时,必须用否定形式；如果主句中的谓语动词是延续性动词时,用肯定或否定形式都可以,但表达的意思不同;4.由since引导的时间状语从句;since引导的从句的谓语动词可以是延续性的动词,又可以是瞬时动词;一般情况下,从句谓语动词用一般过去时,而主句的谓语动词用现在完成时;但在It is ＋时间＋since从句的句型中,主句多用一般现在时;5.由as soon as, immediately, directly, instantly, the moment, the instant, the minute, 等引导的时间状语从句;这些连词都表示“一……就”;hardlyscarcely, rarely…when / before, no sooner…than 相当于as soon as之意;主句用过去完成时,从句用一般过去时;当hardly, scarcely, rarely和no sooner位于句首时,主句应用倒装语序;6.由by the time引导的时间状语从句;时态的变化：在一般情况下,如果从句的谓语动词用一般过去时,主句的谓语动词用过去完成时；如果从句的谓语动词用一般现在时,主句的谓语动词用将来完成时;7.由each time, every time和whenever引导的时间状语从句;8.由as long as和so long as引导的时间状语从句;这两个连词表示“只要；和…一样长”;2地点状语从句地点状语从句一般由连接副词where, wherever等引导,已经形成了固定的句型,：句型1：Where＋地点从句,there＋主句;此句型通常译成“哪里……哪里就……”；主句在从句后面时,there 可用可不用；如果主句在从句的前面时,一般都不用there;句型2：Anywhere/ wherever＋地点从句,＋主句;状语从句是句子的状语由一个从句充当,来修饰主句中的动词,形容词或副词等;状语从句都由从属连词引导,与主句连接,放在句末时,一般不在前面加逗号;3原因状语从句： because, since, as和for都表示原因;because 语势最强,回答why提出的问题,用来说明人所不知的原因;当能够很明显的看出原因或人们已知原因,就用as或since;由because引导的从句如果放在句末,且前面有逗号,则可以用for来代替;但如果不是说明直接原因,而是多种情况加以推断,就只能用for;4目的状语从句：表示目的状语的从句可以由in order that, so that,等词引导;5结果状语从句：结果状语从句常由so...that 或 such...that引导,首先要了解so和such后面分别跟什么词;such是形容词,修饰名词或名词词组,so是副词,只能修饰形容词或副词;so 还可与表示数量的形容词many, few, much, little连用,形成固定搭配;The box is so heavy that I can't carry it.6让步状语从句：是由though, although 引导的状语从句;。
分钟搞懂英语中的各种从句
1分钟搞懂英语中的“各种从句〞英语中的从句分三类：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2〕副词性从句：状语从句〔表时间、条件、结果、目的、原因、让步、地点、方式〕*名词性从句：在句中作各类名词成分〔1〕主语从句在句中作主语成分例句：Whether it is going to rain is not known yet. 天会不会下雨还不得而知。
解读：Whether引导主语从句，whether it is going to rain在句中做主语成分。
〔2〕宾语从句在句中作宾语成分例句：I do not know where he lives. 我不知道他住在哪里。
解读：where引导宾语从句，where he lives在句中作宾语成分。
〔3〕表语从句在句中作表语成分例句：I am who I am. 我就是我。
解读：who引导了一个表语从句，who I am在句中作表语成分。
〔4〕同位语从句在句中解释说明前面的抽象名词例句：The idea that the earth is the center of the universe is wrong. 地球是宇宙中心的观点是错误的。
解读：that引导了一个同位语从句解释说明前面的“idea〞，常见的可以跟同位语从句的名词有：news, idea, fact, thought, question, hope, message, suggestion, truth。
引导词除了that，还可以是whether, how, when, where〔举例：I have no idea when he will come.〕*形容词性从句：定语从句相当于一个形容词，用于修饰前面的名词。
〔1〕限定性定语从句例句1：There are many students who want to study abroad. 有很多学生都想出国留学。
英语八大从句类型与用法总结
英语八大从句类型与用法总结从句，即从属子句，是复句中具有分属地位的分句，它是一种绝大部分语言都有的语法结构。
在现代汉语的语法中，“从句”不作为专业术语被使用。
在现代英语的语法中，从句指复合句中不能独立成句，但具有主语部分和谓语部分，由that、who、whom、when、why、where、how、whether、which等引导词（Connective）引导的非主句部分。
从句用法总结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：*It is a fact\a pity\a question\good news that...*It seems\appears\happened\has turned out that...*It is clear\important\likely\possible that...*It is said\reported\estimated\has been proved that...It is said that comic books create a connection between people of the same generation.It seems that the performance is very useful.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。
What we lack is experience.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。
How the plan is to be carried out should be discussed again.I did know why I felt like crying.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。
英语中的各种从句详解
从句一．名词性从句在句子中起名词作用的各种从句统称为名词性从句。
这类从句在句中可担任主语、表语、宾语和同位语，名词从句可以分为主语从句、表语从句、宾语从句和同位语从句。
1.主语从句在句子中担当主语的是一个句子，这个从句就叫作主语从句。
主语从句可以由下列连词、连接代词和连接副词引导，且不能省略。
连词：that, whether连接代词：what, whatever, who, whoever 等连接副词：when, where, how, why(1)由连词that, whether引导的主语从句连词that, whether在从句中的作用只是引导主语从句，它在从句中不担任成分，不能省略，且由that, whether引导的主语从句，多用it多形式主语e.g That the earth is round is true.=It is true that the earth is round.地球是圆的，是一个事实。
Whether he’ll come or not hasn’t been decided.= It hasn’t been decided whether he’ll come or not.(2)由连接代词或连接副词引导的主语从句连接代词who, which和连接副词when, where, how, why都可以引导主语从句，它们分别在从句中担任主语、宾语和状语，不能省略，翻译时，不能把它们译为疑问句，由它们引导的主语从句，也可以用形式主语it引导e.g Who let out the news remained unknown. =It remained unknown who let out the news.谁泄漏了那个消息仍旧无人知道。
When we’ll start is not clear. =It is not clear when we’ll start.我们何时出发还不清楚。
英语八大从句类型总结
英语八大从句类型总结主句和从句的划分方法是相同的。
句子的成分从谓语动词处来划分比较容易。
今天我们就一起来看看吧!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。
主语从句用作主语，如：：That the earth is round is true. 地球为圆的是真实的。
宾语从句用作宾语。
如：Do you know where he lives?表语从句用作表语，如：My opinion is that you should not go alone. 我的意见是你不应单独前往。
同位语从句用于解释说明前面的名词。
如：The fact that the earth is round is true. 地球是圆的的事实是真实的。
that从句用于解释说明the fact定语从句相当于一个形容词，用于修饰前面的名词。
如：The student who answered the question was John. 回答问题的学生是John.状语从句相当于一个副词，如：When it rains， I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。
时间状语If he comes tomorrow， you will see him. 如果他明天来，你就可以看见他。
if引导的条件状语从句，其结构为：if +状语从句，+主句。
要注意在状语从句中有一个规则是“主将从现”，即主句是将来时，则从句要用一般现在时表示将来。
从句的知识点总结
从句的知识点总结一、从句的概念。
从句是复合句中不能独立成句，但具有主语部分和谓语部分，由that、who、whom、when、why、where、how、which等引导词引导的非主句部分。
二、从句的种类。
1. 名词性从句。
- 主语从句。
- 定义：在复合句中充当主语的从句。
- 引导词：that（无意义，不充当成分，只起连接作用，但不可省略）、whether （是否）、连接代词（what、who、which等，在从句中充当主语、宾语、表语等成分）、连接副词（when、where、how、why等，在从句中作状语）。
- 例如：That he will come is certain.（“That he will come”是主语从句，that无意义，不充当成分，“他会来”这件事是确定的）- 宾语从句。
- 定义：在复合句中作宾语的从句。
- 引导词与主语从句基本相同。
- 例如：I know that he is a good student.（“that he is a good student”作know的宾语）- 注意点：- 宾语从句的时态要与主句时态相呼应。
如果主句是一般现在时，从句根据实际情况使用各种时态；如果主句是一般过去时，从句要用相应的过去时态（一般过去时、过去进行时、过去将来时、过去完成时），但如果从句表示的是客观真理、自然现象等，从句时态不变，仍用一般现在时。
- 宾语从句要用陈述句语序，即主语在前，谓语在后。
- 表语从句。
- 定义：在复合句中作表语的从句。
- 引导词也与主语从句类似。
- 例如：The problem is when we can get a pay rise.（“when we can get a pay rise”作is的表语，说明问题是什么）- 同位语从句。
- 定义：用来解释说明前面某一名词（如fact、idea、news、promise等）的内容的从句。
- 引导词：that（无意义，不充当成分，不可省略）、whether（是否）等。