(完整)高中英语名词讲解及练习

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高中英语名词性从句知识讲解以及练习题附答案

高中英语名词性从句知识讲解以及练习题附答案一、名词性从句概述名词性从句是一种充当名词作用的从句，通常在主句中作主语、宾语、表语或同位语。

它通常由引导词（如that, whether, if, who, whom, whose, which, what等）引导，并且从句中含有一个主语和谓语。

名词性从句的种类有很多，包括主语从句、宾语从句、表语从句和同位语从句等。

下面我们将逐一介绍这些从句。

二、主语从句主语从句作为一个名词，通常位于句首，是一个句子，主要作用是作为主句的主语。

引导主语从句的词：What (什么)；Whether (是否)；If (是否)；That (那个)。

例句：What he said is true. (他说的是真的。

)Whether it will rain tomorrow is uncertain. (明天是否会下雨还不确定。

)If you go, I will go too. (如果你走，我也跟着走。

)That he is coming is good news. (他来的消息是好消息。

)注意：主语从句的谓语动词通常要用单数形式。

What引导的主语从句通常用来表示“事物”的概念。

三、宾语从句宾语从句是一个名词，通常位于主句的动词后面，作为主句的宾语。

它可以由常见的宾语从句引导词引导，例如whether, if, that, who, whom, whose, what, when, where, how等。

引导宾语从句的词：Whether (是否)；If (是否)；That (那个)；Who (谁)；Whom (谁)；Whose (谁的)；What (什么)；When (何时)；Where (何处)；How (如何)。

例句：I know that he is coming. (我知道他要来。

)I wonder if he is telling the truth. (我想知道他是否说了真话。

高中英语语法详讲名词词组讲解语法以及习题

名词和名词词组名词词组是以名词为中心词的词组,名词的类别又决定着名词词组的性质以及随后的动词单、复数形式,即主谓一致问题,所以讲名词要从它的类别谈起。

名词分类和名词词组的句法功能分述如下。

1)名词分类名词分类可从不同的角度进行:可以根据构词法分类;可以根据词汇意义分类;也可以根据语法意义分类等。

a)简单名词、复合名词、派生名词按照构词法,英语的名词可分为简单名词( Simple Noun)、复合名词( Compound Noun)和派生名词( Derivative Noun)。

简单名词指包含一个自由词素的名词,如man, chair,land, ship, water,gas, faith, beauty等。

复合名词指由两个或两个以上自由词素合成的名词,如farmland, seaside, roommate, diehard k固分子), forget-me-not(勿忘草)等。

派生名词指由动词、形容词、简单名词加词缀构成的名词,如arrangement, expectation, ability, greatness, questionnaire, )普通名词和专有名词英语名词,按其词汇意义,可分为两大类:普通名词( Common Noun)和专有名词( Proper Noun)。

普通名词表示同一类的人或物(包括抽象概念)的名称,又可分为个体名词( Individual noun),如boy, house, tiger, insect等;集体名词( Collective Noun),如family,team, cattle, police 词和名词词等;物质名词( Material Noun),如air,snow, bread,rice等;抽象名词表示个人、国家、地方、机构、组织等的专有名称,如Anderson, China, Abstract Noun), glory, honesty, fai lure, education 等。

高中名词专项练习题及讲解

高中名词专项练习题及讲解名词是英语语法中的一个重要组成部分，它代表了人、地点、事物或概念。

在高中英语学习中，掌握名词的用法对于提高语言能力和理解力至关重要。

以下是一些名词专项练习题及相应的讲解，帮助学生更好地理解和运用名词。

练习题1：名词的单复数形式1. This ___ is very heavy.A. boxB. boxesC. boxs2. There are many ___ in the garden.A. leafB. leavesC. leafs答案与讲解：1. 正确答案是A。

"box"是单数形式，表示一个箱子。

名词的单数形式通常用于指代一个单独的个体或事物。

2. 正确答案是B。

"leaves"是复数形式，表示多个叶子。

在英语中，很多名词的复数形式是通过在词尾加上"-s"或"-es"来形成的。

练习题2：不可数名词1. Water is an ___.A. foodB. drinkC. advice2. We need to buy some ___ for the party.A. furnituresB. informationsC. drinks答案与讲解：1. 正确答案是C。

"advice"是一个不可数名词，表示建议或意见，它没有复数形式。

2. 正确答案是C。

"drinks"是可数名词，表示饮料，可以有复数形式。

而"furniture"和"information"是不可数名词，没有复数形式。

练习题3：名词所有格1. The ___ of the house is very beautiful.A. roofB. roofsC. roof’s2. My ___ is in the classroom.A. bookB. booksC. book’s答案与讲解：1. 正确答案是C。

高中英语名词的用法及练习70道题

高中英语名词用法名词可以分为专有名词和普通名词，专有名词是某个〔些〕人，地方，机构等专有的名称，如Beijing，China等。

普通名词是一类人或东西或是一个抽象概念的名词，如：book，sadness 等。

普通名词又可分为下面四类： 1〕个体名词：表示某类人或东西中的个体，如：gun。

2〕集体名词：表示假设干个个体组成的集合体，如：family。

3〕物质名词：表示无法分为个体的实物，如：air。

4〕抽象名词：表示动作、状态、品质、感情等抽象概念，如：work。

个体名词和集体名词可以用数目来计算，称为可数名词，物质名词和抽象名词一般无法用数目计算，称为不可数名词。

归纳一下，名词的分类可以下列图表示：名词专有名词不可数名词普通名词物质名词抽象名词集体名词可数名词个体名词1.1 名词复数的规那么变化情况构成方法读音例词一般情况加-s 清辅音后读/s/ map-maps浊辅音和元音后读 /z/ bag-bags /car-cars以s, sh, ch, x等结尾加 -es 读 /iz/ bus-buses/ watch-watches以ce, se, ze,等结尾加 -s 读 /iz/ license-licenses以辅音字母+y结尾变y 为i再加es 读 /z/ baby---babies1.2 其它名词复数的规那么变化1〕以y结尾的专有名词，或元音字母+y 结尾的名词变复数时，直接加s变复数。

例如：two Marys the Henrysmonkey---monkeys holiday---holidays2〕以o 结尾的名词，变复数时： a. 加s，如： photo---photos piano---pianosradio---radios zoo---zoos； b. 加es，如：potato--potatoes tomato--tomatoesc. 上述a和b两种方法均可，如zero---zeros / zeroes。

高中英语-名词性从句专题讲解及巩固练习(含答案)

高中英语名词性从句专题讲解及巩固练习定义：起名词性作用的从句，叫名词性从句。

本来该由名词充当的主语、宾语、表语和同位语部分，换由一个句子来充当，这样的句子就是名词性从句。

【归纳】1.只能用whether,不能用ifa.主语从句b. 表语从句c. 同位语从句e. 介词后的宾语从句f. whether to do 做动词宾语不能用if to do.g.whether or not 连在一起引导宾语从句时不用if.2.that和what的区别what除起连接作用外，还在名词性从句中充当成分，可做从句的主语、宾语、或表语。

that在名词性从句中不充当任何成分，只起连接作用。

例：I have no doubt that he will come.I have no idea what he did that afternoon.一．主语从句：在复合句中作主句的主语。

●__________ he is a famous singer is known to us.●__________ he will go to America is not yet fixed.●__________ she’s coming or not doesn’t matter too much.●__________ broke the glass yesterday is not clear.【keys】That; When/How; Whether; Who【归纳】1.为避免主语冗长,句子头重脚轻, 经常用it作形式主语, 主语从句放在后面作真正的主语。

例：That her hair was turning gray worried her a lot.-----It worried her a lot that her hair was turning gray.常考句型：It’s likely / possible / important / necessary / clear that…很可能/ 重要的是… / 必要的是… / 很清楚…It’s said / reported that…据说/据报道…It seems / appears / happens that…显然、明显、碰巧…It’s been announced / declared that…已经通知/宣布…It’s no wonder that…并不奇怪/无疑…It’s a pity/a fact /a common knowledge / a common saying that…2.if不能引导主语从句，只能用whether3.单个的主语从句作主语时，谓语动词用句单数形式；如果是两个或两个以上的主语作主语，谓语动词则视情况而定。

高中名词性从句全面讲解及练习含答案

高中英语讲义---- 名词性从句（主从、表从、宾从，同从）1，陈述句做名从用连词that + SV, that 表主句确定从句完好，不做成分。

主从可用it 做形式主语，宾从第一个that 可省略。

You study hard.主从：That you study hard is known to us.= It is known to us that you study hard.表从：My opinion is that you study hard .宾从：I think (that) you study hard. …and that (不能省略)….同从：My opinion that you study hard is known to us. *比拟同从和主从！●一般抽象名词后对其进展说明和说明的完好句子就是其同位语从句，不完好就是定语从句。

I appreciate your idea that we have an exam every week. （that后完好—同从）I appreciate your idea that you came up with last time.（that后不完好---定从）2，一般问句做名从用连词whether(是否) + SV，whether表主句不愿定从句完好，宾从中可用if（介词后或宾从后有or not时只用whether）。

Does your friend like English ?主从：Whether your friend likes English isn’t clear .=It isn’t clear whether your friend likes English.表从：My question is whether your friend likes English.宾从：I don’t know whether/ if your friend likes English.同从：My question whether your friend likes English isn’t clear.3, 特殊问句做名从用疑问词（连词）+ SV, 疑问词做主语时干脆+谓语。

高中英语语法专题：名词(含答案)

导学案【词汇串烧】Fall in Love with EnglishHiding behind the loose dusty curtain, a teenager pack ed up his overcoat into the suitcase. He planned to leave home at dusk though there was thunder and lightning outdoors. He had got to do this because he was tired of his parents’ nagging about his English study and did not want to go through it any longer. He couldn’t get along well with English and dislike d join ing in English classes because he thought his teacher ignore d him on purpose. As a result, his score in each exam never add ed up to over 60.His partner was concerned about him very much. She understood exactly what he was suffer ing from, but entirely disagree d with his idea. In order to calm him down and settle his problem, she talked with him face to face and swap ped a series of learning tip s with him. The item s she set down helped him find the highway to studying English well.The teenager was grateful and got great power from his friend’s words. Now, he has recover ed from being upset and has fall en in love with English.爱上英语有个少年躲在积满灰尘的松散窗帘后把大衣装入手提箱。

高中英语名词性从句讲义及练习

高中英语名词性从句讲义及练习1.名词性从句的分类主语从句、宾语从句、表语从句、同位语从句Eg. 1) I know that he came to Beijing yesterday.2)What he said is rather interesting.3)This is what he’s emphasizing about.4)Linda, who is your teacher, will visit you in the next weekend.2.如何判断是哪一种从句主语从句：What she said is interesting.What he confessed will make you suffered.（）V ……宾语从句：1)I hate that you always talk like that. Vt + 句子2)I’m interested in what he said just now. 介词+ 句子3)I’m sure that he will come tomorrow. 形容词+ 句子表语从句：This is what I said yesterday.That’s why I don’t wanna be with you any more.同位语从句：He revealed the fact that he doesn’t like you anymore .3.名词性从句如何选择连词I know _______ he likes.1）阅读题和改错题里找谓语，语篇填空里看_______（空白格）前面还是后面为句子。

2）找到谓语后确定从句范围。

3）看连词在从句中是什么位置。

作主语、宾语、定语或是状语。

I know _______ is good.从句中做主语：人who 物：whatI know _______ he likes.从句中做表语、宾语：人who/whom 物：whatI know _______ book is good.从句中做定语：whichI know _________ he lives.从句中做状语：where when why how占位词：that whether if当堂练习：1._______________ he said at the meeting astonished everybody present.2._______________ worries me a lot is that I’m always forgetting ___________ I have just done.3.A modern city has been set up in __________ was a wasteland ten years ago.4.With his work completed, the business stepped back to his seat, feeling pleased _________ he was a man of action.5.______________ makes me this shop different is that it offers more personal.6.See the flag on top of the building? That was __________ we did this morning.7.After _____________ seemed an endless effort, the patient was finally able to take a normal walk.8.They have not made any decision on _____________ they are going do to deal with the waste and control pollution.9.The other day, my brother drove his car down the street at __________ I thought was a dangerous speed.10.It was a matter of _______________ would take the position.[注意]1）what 和how 的区别I don’t know what I should do.I don’t know how I should do.练习：It is none of your business ___________ other people look at you.It is none of your business ___________ other people say.2）which 和what的区别I know ________ book is funny.I know _______ is funny.练习：It is generally considered unwise to give a child ____________ he or she wants._______________ team wins on Saturday will go through to the national championships.3) whether 和if 的区别_____________________ the 2024 Olympic Games will be held in Beijing is not known yet.If 只引导宾语从句whether和if的区别。

高中英语名词性从句详细讲解与练习（附答案）

高中英语名词性从句详细讲解与练习在句子中起名词作用的从句叫名词性从句。

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，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句、同位语从句。

引导名词性从句的词叫做连接词，包括：1.连词（在名词性从句中只起连接作用，不作成分）2.连接代词（在名词性从句中作主语、宾语或表语）3.连接副词（在名词性从句中作状语）所有的名词性从句的语序都是陈述语序。

I主语从句：是在主句中作主语的从句。

它由连接词引导，通常位于谓语动词之前。

连接词：1.连词：在从句中不充当任何成分，常见的引导主语从句的连词有that, whether oThat he got the first prize excited him much.他获得一等奖一事使他非常兴奋。

It is doubtful whether we can get there on time.我们能否按时到达那儿还不确定。

D that引导的主语从句:在从句中不作任何成分，也没有实际意义。

一般情况下that不可省略。

That light travels in straight lines is known to all.众所周知，光沿直线传播。

That you don't like him is none of my business.你不喜欢他不关我的事。

2）whether引导的土语从句:常置于句首，表示“是否”之意；if一般不引导主语从句。

Whether he can finish his task on time is of greatimportance.他是否能按时完成任务非常重要。

Whether you can succeed or not depends on howhard you work at it.你能否成功取决于你努力的程度。

2.连接代词：在从句中起名词或代词的作用，常作从句的主语、宾语、表语或定语,有具体意义且不能省略。

高中英语语法--名词性从句专项讲解及训练

名词性从句名词性从句一．概述：在句子中起名词作用的各种从句统称为名词性从句。

根据它们在句中的语法作用，这类从句又可分为主语从句、表语从句、宾语从句和同位语从句。

四．if, whether的区别1.引导主语从句时，如果主语从句放在句首，只能用whether不能用if引导，但是如果用it 做形式主语，而把主语从句放在句末时，也可以用if引导.2.引导宾语从句时常放在动词know, ask, care, wonder之后，if和whether均可。

3.在介词后面的宾语从句中，在表语从句、同位语从句中，表“是否”，只能用whether；4.whether和if都可以和or not连用,但是whether 之后可以直接跟or not,而if不可以。

I don’t know whether or not I will stay.（只能用whether）5.在不定式前只能用whether.如：I can’t decide whether to stay. 我不能决定是否留下。

五．与“命令、要求、建议”等相关的名词性从句中通常用虚拟语气，虚拟语气的构成是“should＋动词原形”或省去should，直接用动词原形。

六．名词性从句以考查引导词为主，同时考查时态，语序，与其它从句的区别以及混同虚拟语气的考查。

一．主语从句1.主语从句定义：在复合句中充当主语的句子叫做主语从句。

That he will succeed is certain.Whether wild life can be well protected is of great importance.Who will go makes no different.Which kind of food is the best is still not certain.What is needed for the space trip is careful preparation.How we can help the twins will be discussed at the meeting.When they’ll start the project has not been decided yet.Where he hid the money is to be found out.Why dinosaurs died out remains a puzzle.2.主语从句引导词按照在句中是否做成分主要分为三类：连词that、whether、if 连接代词、连接副词。

英语语法.高中版-名词-含专项练习

英语语法.高中版第一讲：名词一名词的概念名词是表示人、地方、事物或抽象概念的名称的词。

二．名词的分类名词专有名词普通名词可数名词个体名词集体名词不可数名词物质名词抽象名词1.专有名词表示人物、地方、国家、组织、机构等专有名称的词。

如：Tom，China，Christmas（圣诞节），the Great Wall（长城）特性：①原则上与其所表示的事物一一对应。

②实词的首字母要大写。

2.普通名词泛指一类人或事物的名称的词。

如：actor（演员），dictionary（词典），money（钱），weather（天气）分类：可数名词如：dictionary（词典），island（岛屿）不可数名词如：fun（乐趣；有趣的事），money（钱），furniture（家具）可数名词分类：个体名词和集体名词个体名词：表示单个的人或事物的名称的词。

如：garden（花园），actor（演员），hammer （锤子）集体名词：表示由若干人或事物组成的集合体的名称的词。

如：family（家庭），class（班级），staff（全体工作人员），team（组；队）不可数名词分类：物质名词和抽像名词物质名词：表示构成世上万物的物质或材料名称的词。

如：cotton（棉花），water（水），ink（墨水），wood（木头）抽像名词：表示性质、行为、状态、情感等抽像概念名称的词。

如：freedom（自由）fun （乐趣）health（健康）happiness（幸福）anger(忿怒) value（价值）注意：①英语中有些词既可用作可数名词，也可用作不可数名词。

用作不可数名词时表抽象概念或物质，而用作可数名词时则表示具体的事物。

如：success成功→a success一个成功的人（事） chicken鸡肉→chicken一只小鸡room 空间→a room一个房间hope希望→a hope希望的一件事情beauty美丽→a beauty一位美人exercise锻炼→an exercise一套动作；练习word消息→a word一个单词；一句话experience经验→an experience一次经历、体验②常见不可数名词。

第01章名词高中高考英语知识汇总（真题+解析+教程+练习+答案）

第01章名词⾼中⾼考英语知识汇总（真题+解析+教程+练习+答案）第⼀章名词第⼀节真题精析1. The faces of four famous American presidents on Mount Rushmore can be seen from a_______ of 60 miles.【2004全国IV】A. lengthB. distanceC. wayD. space2. I keep medicines on the top shelf, out of the children’s . 【2004天津】A. reachB. handC. holdD. place3. The environmentalists and wild goats’ _________ on the vast grasslands was a good indication of the better environment.【2004上海】A. escapeB. absenceC. attendanceD. appearance4. In dealing with public relations, we should make every effort to prevent the _____ in personality. 【2004上海】A. contactB. contrastC. connectionD. conflict5. Chinese arts have won the _________ of a lot of people outside China.【2004上海】A. enjoymentB. appreciationC. entertainmentD. reputation6. “I don’t think it’s my that the TV blew up . I just turned it on , that’s all ,” sai d the boy . 【2003上海】A．error B．mistake C．fault D．duty7. —I’m sorry I stepped outside for a smoke. I was very tired.—There is no ____for this while you are on duty. 【2003北京】A. reasonB. excuseC. causeD. explanation8. The manager has got a good business _________ so the company is doing well. 【2003北京】A. ideaB. senseC. thoughtD. thinking9. To regain their after an exhausting game , the players lay in the grass. 【2002上海】A. forceB. energyC. powerD. health10.According to the recent research , heavy coffee drinking and heart attack is not necessarily and effect. 【2002上海】A. reasonB. impactC. factD. cause11.Every new has the possibility of making or losing money. 【2002上海】A. eventB. ventureC. adventureD. expectation12. As a result of destroying the forests , a large of desert covered the land. 【2001上海】A. number…hasB. quantity… hasC. number… haveD. quantity…have13. In the botanic garden we can find a (n) of plants that range from tall trees to small flowers. 【2001上海】A.speciesB. groupC. amountD. variety14. ---- Can you shoot that bird at the top of the tree?---- No, it’s out of . 【2001上海】A. rangeB. reachC. controlD. distance15. The life of London is made up of many different . 【2001上海】A. elementsB. sectionsC. materialsD. realities16. You'll find this map of great _____ in helping you to get round London. 【NMET1998】A. priceB. costC. valueD. usefulness17. If by any chance someone comes to see me, ask them to leave a _______.【NMET1997】A. messageB. letterC. sentenceD. notice18. I'll look into the matter as soon as possible. Just have a little. 【NMET1996】A. waitB. timeC. patienceD. rest19. He gained his by printing of famous writers. 【NMET1995】A. wealth; workB. wealths worksC. wealths; workD. wealth; works20. Here's my card. Let's keep in ______. 【MET1994】A. touchB. relationC. connectionD. friendship【答案与解析】1. B 该题考查名词的辨析。

(完整版)高中英语名词讲解及练习

名词一、名词的分类专有名词主要是指人名、地名或某类人或事物的名称，如Beijing，China等。

普通名词是一类人或东西或是一个抽象概念的名词，如：book，sadness等。

专有名词抽象名词不可数名词物质名词普通名词集体名词个体名词可数名词个体名词和集体名词可以用数目来计算，称为可数名词（Countable Nouns），物质名词和抽象名词一般无法用数目计算，称为不可数名词（Uncountable Nouns）。

Proper Nouns：指人名、地名及某些人和事物专有的名称Eg: Diana; Beijing; Americans; English; May; New Year’s Day注意：专有名词的第一个字母要大写Common Nouns：一类人或东西或是一个抽象概念的名词1. Individual Nouns: 指作为个体而存在的人或东西可以指具体的人或物。

Eg: aunts; a panda; apartments也可指抽象东西。

Eg: a year; fairy tales; a dream2. Collective Nouns: 表示若干个个体组成的集合体Eg: army; audience; crew; family; team; police; government; public集体名词有时作单数看待，有时作复数看。

一般来说，视为整体时作单数看，突出它的成员时作复数看。

His family _____ not large.His family ______ all music lovers.有少数集体名词通常用作单数。

Eg: The gang is being hunted by the police.Our company is sending him to work in Berlin.个别集体名词则多作复数看待。

Eg: The police are looking for him.3. Material Nouns: 指无法分为个体的物质。

(完整word版)高中英语名词讲解及练习

名词一、名词的分类专有名词主要是指人名、地名或某类人或事物的名称，如Beijing，China等。

普通名词是一类人或东西或是一个抽象概念的名词，如：book，sadness等。

Eg: aunts; a panda; apartments也可指抽象东西。

一般来说，视为整体时作单数看，突出它的成员时作复数看。

His family _____ not large.His family ______ all music lovers.有少数集体名词通常用作单数。

Eg: The gang is being hunted by the police.Our company is sending him to work in Berlin.个别集体名词则多作复数看待。

Eg: The police are looking for him.3. Material Nouns: 指无法分为个体的物质。

高中英语2025届高考语法复习名词知识讲解(名词分类+名词的性+名词的数+名词的格+名词的用法)

高考英语语法复习名词知识讲解一、名词分类1、普通名词：表示一类人、东西或抽象概念的名词。

又可分为个体名词、集体名词、物质名词和抽象名词个体名词——单个（类）的人、物、事等，如：boy，house，tiger等集体名词——有集合、团体含义的词，如：family，team，police等物质名词——无法判断个体的事、物，如：air，snow，bread，rice等抽象名词——表达动作、状态、品质、情感等概念，如：glory，friendship等2、专有名词：表示特定的人或事物名称的词。

（首字母需大写）人名——Tom，Cinderella，Michelle等星期、月份、节日——Sunday，February，the Spring Festival等国家、城市——China，London，Paris等建筑、街道——the Fifth Evenue，Downing Street等3、名词对等语：具有名词性质，通常视为单数。

名词短语——The time of the meeting is not decided yet.不定式——To study abroad is my greatest desire.动名词——Seeing him makes me angry.名词性从句——I know that he has finished the work.The problem is when we can get a pay rise.There is a suggestion that Brown should be dropped from the team.二、名词的性1、阳性：指人类社会中的男性个生或者是动物中的雄性个体。

阳性名词用he，his，him，复数用they来指代。

如：Brother，husband，king，uncle，bull，father等。

例：Tom is a teacher.He works in a primary school.2、阴性：指人类社会中的女性个生或者是动物中的雌性个体。

(完整版)高中英语名词性从句讲解

适用文档名词性从句解说在复合句中起名作用的从句叫做名性从句。

它包含主从句、从句、表从句和同位从句。

名性从句是中学段的一个重要法目，在年的高考取几乎都波及到，而且每年的命各有化。

解析届高考名性从句考的焦点主要有以下六个方面1.考名性从句的序2.考引 that与 what 的区3.考 it 在名性从句中作形式主或形式的用法4.考 whether 与 if 的区5.考名性从句中的疑+ever 引的名性从句与no matter+ 疑引的状从句的区6.考名性从句的虚气法重点解析一、名性从句主从句、表从句、从句、同位从句，在整个句子中所起的作用，相当于一个名。

所以，四种从句通称名性从句。

引名性从句的接可分三：接： that, whether, if（不充任从句的任何成分）接代： what, whatever, who, whoever, whom, whose, which.接副： when, where, how, why1.主从句作句子主的从句叫主从句。

主从句往常由附属that ，whether ，if和接代what ，who，which ，whatever ， whoever 以及接副 how， when， where， why 等引。

that 在句中无，只起接作用；接代和接副在句中既保存自己的疑含、又起接作用，在从句中充任从句的成分。

比如：What he wants to tell us is not clear.他要跟我什么，不清楚。

It is known to us how he became a writer.我都知道他是如何成一名作家的。

Where the English evening will be held has not yet been announced.英晚会将在哪里行，没有宣告。

有防止句子重脚，常用形式主it取代主从句作形式主放于句首，而把主从句置于句末。

主从句后的一般用数形式。