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九年级英语知识点整理主语从句

九年级英语知识点整理主语从句
九年级英语知识点整理主语从句

九年级英语知识点整理:主语从句

九年级英语知识点整理:主语从句

主语从句用作主语的从句叫主语从句。 (That the earth goes around the sun) is known to all. (How this happened) is not clear to anyone. (Whoever comes) is welcome. (When we shall have our sports meeting) is still a question. (Whether he will come today) is still unknown. 注意: 1. 主语从句是特殊疑问句,应该用特殊疑问词加陈述句语序。 2. that引导的主语从句放在句首,不可省

略that。 3. 主语从句常用it作形式主语,真正的主语放在后面,这时that可省略。 It's a pity (that) you missed such a good opportunity. It's still a question when we shall buy the new equipment. It's still unknown whether he will come or not. 4. It is + P.P.+ that ; It + Vi + that,It作形式主语。 It is said that the president will visit our company. It seems that he has caught a cold.

主语从句:在复合句中充当主语成分的句子叫做主语从句。常规主

语从句,即句子在复合句中充当一个主语。主语从句的时态:不受

主句的时态影响和限制。例如: That he finished writing the composition in such a short time surprised us all. What we need is time. It is certain that he will win the match. (1) 引导

主语从句连词有that,whether,who,what,whatever等 (2) 连词位

于句首不能省略 (3) 主语从句大多数情况下视为第三人称单数主

语从句引导词: 1、由连词that引导的主语从句。例如:That you will win the medal seems unlikely. 你想获得奖牌看起来是不可

能的。 That you are so indifferent bothers me. 你如此冷淡使

我很烦恼。 That she survived the accident is a miracle. 她在事故中幸免于难简直是奇迹。 2、用连接代词或连接副词if, whether 引导的主语从句。例如: Which of them escaped from the prison is still a mystery. 他们哪一个是从监狱里逃跑的,仍然是个谜。When they will come hasn’t been made pubic. 他们什么时候来

还不知道。Whether she is coming or not doesn’t matter too much.

她来不来都无关紧要。 3、用关系代词引导的主语从句。例如:What you need is more practice. 你所需要的是更多的训练。 What I want to know is this. 我想知道的就是这事。 Whatever we do is to serve the people. 我们无论做什么都是为人民服务。 4、主语从句可以直接放在主语位置上,也可以用it作形式主语,而将从句放在句末(尤其是当谓语较短时)。例如:That light travels in straight lines is known to all. 光沿直线传播,这是众所周知的事。 =It is known to all that light travels in straight lines. 众所周知光沿直

线传播。 When the plane is to take off has not been announced . 飞机何时起飞还没有宣布。 = It has not been announced when the plane is to take off. 还没有宣布飞机何时起飞。当what引导的主语从句表示“…的东西”时,一般不用it作形式主语。错:It is a book what he wants. 对:What he wants is a book. 他想要的是本书。如果带主语从句的句子是疑问式,则必须用it作形式主语的结构。例如:Has it been settled who will be sent to carry out the task ? 谁将被派去执行这项任务决定了吗?主语从句与宾语

从句区别:主语从句与宾语从句两者的用法和在句中的作用是不同的,下面从它们的各自用法来介绍。一.主语从句主语从句定义:在句子中担当主语的是一个从句,这个从句就叫做主语从句。主语

从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。 1. It 作形式主语和it

引导强调句的比较①主语从句常用it作形式主语,一般常用句型为:It is+{名词/形容词/过去分词}+主语从句例如: It is still a question whether she will come or not. It is strange that you should like him. It is still unknown which team will win the match. 另外,还有一些比较多见的结构:It turned out that……; It has been prov ed that……; It happened/occurred that……; It is well-known that……等等②而强调句则不同,它的结构是:

It+be+被强调部分+that+从句强调主语:It is the times that produce their heroes.时势造英雄强调宾语:It is English that Prof.Lin teaches us. 强调状语:It was in shanghai that I saw

the film. 判断是否是强调句有一个方法,就是将that以后的“句

子的其余部分”拿出来单独看,看有没有缺成分,缺的是什么成分,再把谓语动词后面that前面的那部分,带到你认为缺成分的地方,

如果放进去是一句完整的句子了,那就说明是强调句。 2. 用it 作形式主语的结构 (1) It is +名词+that从句It is a fact that ... 事实是...... It is an honor that ...非常荣幸 It is common knowledge that ...是常识 (2) it is +形容词+that从句 It is natura l that... 很自然...... It is strange that... 奇怪的是 (3)

it +不及物动词+that从句It seems that… 似乎…… It happened that… 碰巧…… (4) it is+过去分词+that从句 It is reported that… 据报道…… It has been proved that… 已证实…… 3.主

语从句不可位于句首的五种情况 (1) if 引导的主语从句不可居于

复合句句首。 (2) It is said , (reported) …结构中的主语从句

不可提前。例如: It is said that President Jingo will visit our school next week. (3) It happens…, It occurs… 结构中的主语从句不可提前。例如: It occurred to him that he failed in the examination. (4) It doesn’t matter how/whether …结构中的主语从句不可提前。例如:It doesn’t matter whet her he is wrong or not. (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: Is it likely that it will rain in the evening? 4. What 与that 在引导主语从句时的区别 What 引导主语从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: What you said yesterday is right. 宾语从句用以区分主语从句的几个特征:1、引导词:what\which\whose\when\whether\if\where 2、语序:

宾语从句必须是用陈述语句。如:I think that you must work harder. 宾语从句的引导词、连接词的区别、否定转移等现象。 (1)表达时间的几个句型:一般用when或者是what time: What time will the train leave? 由于时刻都是固定的,也可以用一般现在时代替一般

将来时: What time does the train leave? (2)时间的表达方式:8:19(nineteen past eight),7:57(three to eight),在时间的中

间也可以加上分的单词(minutes) (3)had better +动词原型。意思

是提要求,建议。但是上下级不能用这种方式,因为语气太重: You had better give up smoking . (4)sb leave sth +地点 I left my book in my classroom yesterday. (5)may I have your

name(address\age)?一般询问对方的年龄、名字等,不要习惯以前的问法,这样很不礼貌,而是要采访上面的问法。以前的习惯是:how old are you? \what's your name? (6)修饰名词的代词次序:限-

描-大-形---年---颜----籍----物--------类+名词: this is a bridge. This is a beautiful bridge 补充:从句的语序永远是陈

述句。主语从句结构: 1、It is +名词+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 … ……是常识类似的名词还有:a pity;a wonder;a good thing; no wonder;surprise等。例如: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. 鲸鱼不是鱼,这是常识。 It is no surprise that Bob should have won the game. 鲍勃会赢得这场比赛,这不

足为奇。 2、It is +形容词+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…… 类似的形容词还有: strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc. 例如:It is obvious that conductors and insulators are both important in industry. 很明显导体和绝缘体在工业中都很重要。 It 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 seems obvious that we can not go on like this. 很明显我们不能这样下去了。 3、It is +过去分词+从句It is said that … 据说…… It is reported that … 据报道…… It has been proved that … 已证明…… It

must be proved that… 必须指出…… 类似的过去分词还有:known; estimated; expected; believed; thought; hoped; noted; discussed; required; decided; suggested; demanded; made clear; found out,etc. 例如:It is thought that he is the best player. 大家都认为他是最好的选手。 It is estimated that the vase is 2000 years old. 据估计这个花瓶有2000年的历史。 It is used to be thought that a new star must be due to a collision between two stars. 过去一直认为新星是由于两颗星星之间碰撞产生的。 It has not been made clear when the new road is to be opened to traffic. 还没弄清楚这条路将开始通车。 4、It +不及物动词+从句It seems that … 好像是…… It happened that… 碰巧…… It follows that … 由此可见…… It has turned out that … 结果是…… 类似的不及物动词还有:seem, appear, occur, follow, happen, turn out, etc. 例如:It turned out that nobody remembered the address. 结果是无人记得那个地址。 It now appears that they are in urgent need of help. 看起来他们急需帮助。 It does not matter if I missed my train, because there is another later. 没有赶上这趟火车没有关系,稍晚还有一趟。 It happened that I saw him yesterday. 碰巧我昨天看见他了。当“及物动词 + 宾语”较短时,也可用这种结构。例如:It shocked me that Peter did not tell anybody where he was. 让我吃惊的是彼得没有告诉任何人他在哪里。 It does not interest me whether you go or not. 我对你去不去不感兴趣。 It +某些固定结构+ 主语从句。例如:It doesn’t make too much difference (It doesn’t make any difference / It doesn’t alter the situation),whether it rains or not . 下不下雨都没有多大关系。 It does not make any difference whether it rains or not . 下不下雨没什么分别。 It does not make the least difference to me what you do. 对我来说你做什么都无关紧要。 Is it of much consequence to you that Mr. Wang has failed to do it ? 王先生没有做成这件事对你有什么重要影响吗?

名词性从句之主语从句讲解

名词性从句---主语从句 1. What is needed for the space trip is careful preparation. 2. Her wish is that she can lose weight soon. 3. I think that woman can reach every high achievements in many fields of science. 4. We were very excited at the news that our team had won. 引导名词性从句的关联词可分为三类: 一.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”)以上在从句中均不充当任何成分二.连接代词:what, who, whom, which,whose, whatever, whoever, whichever(作主宾表定) 三.连接副词:when, where, how, why(作状语) I.主语从句 1.定义:在句子中担当主语的是一个从句,这个从句就叫做主语从句。 2.位置:主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it 代替,而本身放在句子末尾。 3.引导主语从句的关联词: (1)从属连词that,whether,if (在从句中不充当成分,仅起连接作用) That Jack won the match yesterday surprised us. Whether he’ll come here isn’t clear. (此处不能用if) (2)连接代词who, whom, whose, what, which, whoever, whatever, whichever(充当主宾表定) What she did is not known. Whoever comes is welcome. (3)连接副词where,when,how,why(在从句中充当状语) How this happened is not clear to anyone. When the meeting will be held is decided by our manager. 4.有时为了避免头重脚轻,常用it作形式主语,而把真正主语放在句子末尾。 How the book will sell depends on its author. = It depends on its author how the book will sell. That he is the best student in the class is obvious. = It is obvious that he is the best student in the class. 用it作形式主语的几种常见结构: (1) It is +名词+从句 It is a fact that … 事实是… It is an honor that …非常荣幸 It is common knowledge that …是常识 (2) It is +形容词+从句 It is natural that… 很自然It is strange that… 奇怪的是… (3) It is +不及物动词+从句 It seems that… 似乎… It happened that… 碰巧… It ap pears that… 似乎… (4) It +过去分词+从句

高中英语语法:主语从句的考点分析与专项训练

高中英语语法主语从句 第一节主语从句 1.考点解析。 1.主语从句一般分为三类:由what等代词引导的主语从句;由连词that 引导主语从句,多数情况下由it作形式主语,that从句放到句子后面去;由连接代词或连接副词(或whether)引导的主语从句。 What they are after is beauty. It is not your fault that we can’t arrive on time. When they will arrive has not been decided. 2. 由关系代词what引导的主语从句,也可由whatever(“所…的一切”)或 whoever(“一切…的人”)引导。 Whatever he wants is your support. Whoever comes will be welcome. 3. 大多数主语从句都可用it代替,作形式主语,把主语从句放在句尾。要注意it代替主语从句和it引导的强调句的区别。强调句的结构是it is/was….+that…,强调人是可把that 换做who,whom,whose。如强调的是状语时,也只能用that,而不能用when, where, how, why等。 It was in Paris that they fell in love with each other. It is the lady who was my English teacher. It was last semester that he won the first prize. 2. 试题详解。 1.______ he needs is more experience. A. Who B. That C. What D. How 2.It was because of the heavy snow ______ the train was late. A. why B. that C. so D. thus 3.It doesn’t matter ______ he likes or not. A. whether B. what C. when D. that 4______ he has won the Noble Prize has been proved to be true. A. What B. How C. It D. That 5.What he wants _______ to sleep more. A. are B. have been C. is D. were 6.______ we can begin this investigation is still a question. A. When B. Why C. What D. That 7.It is ______ that the highway will be open to traffic nest year. A. report B. reported C. reporting D. by report 8.______ fails to see this will make a big mistake. A. Whatever B. what C. wherever D. Whoever 9.It is a mystery _____ the prisoner escaped. A. why B. how C. what D. that 10.It was last summer _____ he graduated from the college. A. that B. when C. / D. where 3. 实战演练。 1. We didn’t know ______ she didn’t come. A. why B. that C. when D. it 2. It is still doubtful _______ she would play the part.

高考英语主语从句讲解

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在句子中起名词作用的句子叫名词性从句。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、同位语等,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、表语从句和同位语从句。今天我们就来重点讲一下其中的主语从句。 在复合句中充当主语成分的句子叫作主语从句。它的具体表现形式是:引导词引导一个从句作主语;或者it作形式主语+谓语/系表结构+引导词+从句。 【例1】that That Chris Lee won the champion of Super Girl in 2005 arouse wide public concern.李宇春赢得2005年超女冠军这件事引起了社会的广泛关注。 【例2】what What caused the accident remains unknown.是什么引起了这一事故仍然未知。 【例3】where Where my wife and I should choose to continue my further education is a question of great importance.我太太和我应该去哪享受我们的蜜月还没有最后决定。 【例4】which Which university I should choose to continue my further education is a question of great importance.我应该考哪个大学的研究生是个很重要的问题。 【例5】when When and where the test will be given is not yet decided.什么时候在什么地方进行考试还没定下来。 【例6】-ever Whoever gets the job will have a lot of work to do.任何得到这份工作的人都将要有很多工作要做。 【例7】how How we can protect the grain from damp needs to be discussed.我们怎样才能保护粮食不受潮需要讨论。 【例8】whether Whether this is true or not remains a mystery.这是对是错还是个谜。 It句型 有的时候主语从句过长,根据人类短暂记忆规律,主语过长会影响理解和阅读,往往会用it作形式主语,而把真正的主语放在句尾,加以强调,是为it句型。 【例】 It is a pity that we won’t be able to go to the south to spend our summer vacation.我们不能去南方度过我们的暑假很遗憾。 为表示强调,常以形式主语it引导从句。It+谓语+引导词+从句。由于主语从句一般被认为是单数形式,形式主语代表真正的主语,因此要用it。因此形式主语的谓语动词、be动词+表语均为第三人称单数形式或过去式。 英国桂冠诗人约翰·梅斯菲尔德说:“快乐的日子使人睿智。”很多考生可能觉得这句话应该反过来说,但其实复习过一段时间以后,面对着越来越复杂的难题,你就会发现,保持快乐的心态,复习效率自然而然就会提高。

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whichever 连接副词: where when how why 例如: whatshedidisnotyetknown.她干了什么尚不清楚。 Howthishappenedisnotcleartoanyone.这事怎样发生的,谁也不清楚。 whoevercomesiswelcome.不论谁来都欢迎。 whereveryouareismyhome----myonlyhome.你所在的任何地方就是我的家----我唯一的家。 注:主语从句能用it作形式上的主语。常以it作形式主语的句型有: A. It+be+形容词+that从句。 例如: Itiscertainthatshewilldowellinherexam.毫无疑问她考试成绩会很好。 Itisprobablethathetoldhereverything.很可能他把一切都告诉她了。

B. It+be+名词词组+that从句。 例如: It'sapitythatwecan'tgo.很遗憾我们不能去。 It'snosurprisethatourteamshouldhavewonthegame.我们没赢这场比赛真意外。 c.It+be+过去分词+that从句。 例如: Itissaidthatmr.GreenhasarrivedinBeijing.据说格林先生已经到了北京。 Itisreportedthatchinahassentanotherman-madeearthsat elliteintoorbit.据报道中国又成功地发射了一颗人造地球卫星。 D.It+seem,happen等不及物动词及短语+that从句。 例如: ItseemsthatAliceisnotcomingtothepartyatall.Alice似乎不来参加晚会。 IthappenedthatIwasoutthatday.碰巧我那天外出了。 E.It+doesn'tmatter+连接代词或连接副词引起的主语从句。

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名词性从句常见考点突破 一、名词性从句的概念及分类 1.顾名思义不,名词性从句就是指在句子中起名词作用的句子,功能相当于名词词组。 2.根据其在句中不同的语法功能,名词性从句可以分为主语从句、宾语从句、表语从句和同位语从句。同位语从句起对前面的名词进一步解释说明的作用,陈述该名词的内容。 二、名词性从句的三类引导词 1.连接词,包括that,whether和if。that用来引导陈述句,whether和if引导一般疑问句(从句中的一般疑问句要用陈述句语序,而if引导的从句不能作主语)。 2.wh-关系代词,如who,whom,whose,whatever,which等,这类词由于在句中作相应的句子成分,因此一般不能省略。 3.wh-关系副词,如when,why,how,where等,该类词一般也作相应的句子成分。 三、名词性从句的四种类型 1.宾语从句 ①在许多情况下,作为真正宾语的that从句后置,而用it作形式宾语,此时,that 不可省略。例如:You may rely on it that I shall help you.(it作为形式宾语接在rely on后,真正的宾语是that引导的宾语从句。另外,大多数介词不能直接跟that从句作宾语,所以此处需要it作形式宾语。) ②宾语从句分为三类:动词宾语从句、介词宾语从句和形容词宾语从句。动词宾语 从句指的是跟在动词之后且充当其宾语的从句;介词宾语从句指的是跟在一个介词之后充当其宾语的从句;同样,形容词宾语从句指的是跟在某些形容词后面,可理解为该形容词宾语的从句。例如:

I doubt whether he will come.(动词宾语从句) I'm curious as to what he will do.(介词宾语从句) I'm convinced that she is an honest girl.(形容词宾语从句) 2.同位语从句 ①同位语从句就是跟在名词后面,表达具体内容、起解释说明作用的从句。that是其最常见的引导词,不能省略。 ②注意下列名词后面可接同位语从句:hope(希望),fact(事实),news(消息), problem(问题),conclusion(结论),rumor(流言),agreement(同意,协议),belief(信仰),concept(观念,概念),idea(想法),question(问题),suggestion (提议),thought(想法),conviction(确信,定罪),doubt(怀疑),decision (决定,决心),assumption(假定,设想),evidence(迹象,证据),等。例如:The news that I havepassed the exam is true. ③在少数情况下,可用连接代词或连接副词引导同位语从句。例如:I have no idea why she cries. 注:同位语可以分为同位语结构和同位语从句。上文提到的是后者;而同位语结构跟在名词后,对其解释说明,与同位语从句不同的是,它只是词或词组。例如:The only way that they canpreserve their history is to recount it as sagas--legends handed down from one generation ofstory-tellers to another.(legends作sagas的同位语,后接过去分词短语作定语。) 3.主语从句 许多情况下,为了平衡句子结构,常用it代替主语从句,将主语从句后置,it只是形式主语。例如:It is not known yet whether they will come today.(It作为形式主语置于句首,而真正的主语-----由whether引导的主语从句------由置于句末。)

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