高中英语主语从句 知识点讲解

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高中英语主语从句讲析课件可修改全文

高中英语主语从句讲析课件可修改全文
2. It is true that the earth moves around the sun.
3. It is a pity that I missed the train.
4. It doesn’t matter whether he will come or not.
5. It seems that it is going to rain.
It’s likely/possible/important/necessary/clear that 很可能/重要的是…/必要的是…/很清楚… It+ be +名词+ that 从句 It’s no wonder that…并不奇怪/无疑
It’s a pity/a fact /a common knowledge (众所周知) / a common saying(俗话说)that It+ be + 不及物动词+ that从句 It seems/appears/happens that…显然、明显、碰巧
matter much.
if, whether都可表示“是否”, 但if不能引 导位于主句之前的主语从句,它可以引导 位于主句之后带有形式主语it的主语从句。
3. TWhhaatt the professor said is of great importance.
that引导主语从句时无词义。What the professor said表示“教授所说的”。
6. It happened that they didn’t know my address.
请你归纳 ?
T——h—a—t —a—s—t—o—r—m——is——c—o—m—i—n—g
is well reported

主语从句高考知识点总结

主语从句高考知识点总结

主语从句高考知识点总结主语从句是英语语法中非常重要的一部分,它在高考中经常被考查。

主语从句用来作为主句的主语,从句的谓语动词通常是单数形式。

这篇文章将对主语从句的用法进行总结和探讨,帮助同学们更好地掌握这一知识点。

主语从句在句子中起到了连接主句和从句的作用。

从句的引导词通常有以下几个:that、whether、what、who、which、whose、when、where以及how等。

在使用主语从句时,要注意根据句子的需要选择合适的引导词。

首先,我们来看一些常见的主语从句的句型。

一种常见的句型是"That + be动词",例如:"That he is coming is certain.",意思是“他来是确定的。

”另一种常见的句型是"It + be动词 + (形容词) + that...",例如:"It is important that we protect the environment.",意思是“保护环境是重要的。

”除了常见的句型外,主语从句还有其他几种形式。

一种形式是主语从句位于句首,例如:"What she said is true.",意思是“她说的是真的。

”另一种形式是使用“whether”来引导主语从句,例如:"Whether he will come or not is uncertain.",意思是“他是否会来是不确定的。

”在使用主语从句时,需要注意主语和谓语动词之间的一致性。

如果主语从句所引导的从句是一般现在时态,那么主句的谓语动词也应该使用一般现在时态。

同样,如果从句是一般过去时态,那么主句的谓语动词也应该使用一般过去时态。

例如:"It is important that he studies hard."应该改为"It is important that he study hard."。

(完整word版)主语从句讲解

(完整word版)主语从句讲解

主语从句1.定义:用作主语的从句叫做主语从句。

2.引导主语从句的关联词有三类:(1)从属连词that、whether。

如:如:That they were in truth sisters was clear from the facial resemblance between them。

很明显,她们确是亲姐妹,她们的脸型很相似.Whether he’ll come here isn’t clear。

他是否会来这里还不清楚。

从属连词:that, whether等.that 引导主语从句只起引导作用,本身无实际意义,在主语从句中不充当任何成分,但不能省略.由whether及其他连词引导的主语从句放在句首,句后都可. If只能放在句中.造句:1。

、很明显他是个好人.2。

、他通过了考试让妈妈很高兴。

3、天气是否会转晴还不确定。

(3)(特殊疑问词)连接代词who, whom, whose, what, which, whoever, whatever, whichever 如:__________watch was lost is unknown.__________she did is not yet known. 她干了什么尚不清楚.__________side will win is not clear。

__________comes is welcome。

不论谁来都欢迎。

__________ was said has left us much to think。

这里说的话都应当保密.造句:1. 我们需要的是时间。

2。

谁将成为我们的班长还没有决定。

3。

哪本书更好还不知道。

(4) (特殊疑问词)连接副词 where, when, how, why,wherever,whenever,however。

___________ he did it remains a mystery.When they will start is not known yet.How this happened is not clear to anyone。

【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

【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。

2023年高中英语语法精讲,主语从句详细讲解

2023年高中英语语法精讲,主语从句详细讲解

2023年高中英语语法精讲—主语从句详细讲解主语从句结构及用法在句子中担当主语的从句就叫做主语从句,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。

通常结构为“引导词 + 主语 + 谓语 + 其他成分"。

一. 概念:在句子中担当主语的从句就叫做主语从句,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。

主语从句使用陈述语序,其通常结构为“引导词 + 主语 + 谓语 + 其他成分", 但当连接代词同时充当从句主语时,其结构为“连接代词 + 谓语 + 其他成分”。

二. 引导词:1. that引导eg. That you are coming to London is the best news I have heard this long time.2. whether引导eg. Whether they would come to conference was a question.3. 连接代词引导: who,whom, whose, what, which, whoever, whomever, whichever, whatevereg. Whoever is top from wins the game when two matched players meet.4. 连接副词引导: therefore, besides, otherwise, however, moreover, still, thus, meanwhileeg. How this happended is not clear to anyone.5. 关系代词型what引导三. 形式主语it:1. 对关系代词型what引导的主语从句,可以使用形式主语。

eg. It is clear enough what he meant.2. 如果句子是疑问句,则必须用带形式主语it的结构.eg. Is it true that all of us need to to conference?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。

高考英语主语从句知识点

高考英语主语从句知识点

高考英语主语从句知识点主语从句是英语语法中的一个重要知识点,也是高考中经常考察的内容之一。

掌握主语从句的使用方法和注意事项,对于提高语法准确性和阅读理解能力都非常有帮助。

本文将介绍主语从句的定义、使用时的注意事项以及一些常见的主语从句的句型。

一、主语从句的定义主语从句是指在一个句子中充当主语的从句。

它通常由连词that, whether或if引导,也可以由关系代词what, who, which,whom等引导。

二、主语从句的使用注意事项1.主语从句的用法多样化,可以表示陈述、疑问、建议、要求等不同的意义。

在使用时需要根据具体语境进行选择。

2.如果主语从句谓语动词是不及物动词,需要用it作形式主语。

例如:It is important that we study hard.3.在表示是否时,通常用whether或if引导主语从句。

例如:Whether you go or not is up to you.4.在表示疑问句时,常用疑问词引导主语从句。

例如:What you said is not clear.5.当主语从句与主句的主语一致时,可以用it作形式主语。

例如:It's a pity that you missed the party.三、常见的主语从句句型1.由that引导的主语从句。

例如:That he is rich is well known.2.由wh-词引导的主语从句。

例如:What she said is true.3.由whether或if引导的主语从句。

例如:Whether he will come to the party remains to be seen.4.由it作形式主语的主语从句。

例如:It doesn't matter whether you come or not.5.句型:It is + adj. + that从句。

例如:It is important that we protect the environment.四、主语从句的练习题1. ______ you have any questions, please feel free to ask. (whether/if)2. ______ he will pass the exam is still unknown. (that)3. ______ are you going to give your presentation? (where)4. ______ I owe you an apology is obvious. (that)5. ______ he is doing now is to prepare for the final exam. (what)答案:1. Whether2. That3. Where4. That5. What通过以上介绍,我们了解了主语从句的定义、使用注意事项以及常见的句型。

主语从句高考知识点总结

主语从句高考知识点总结

一、主语从句的定义主语从句是一个句子中作主语的从句。

主语从句通常由连接词引导,例如that, whether, who, whom, whose, which, what, 等等。

主语从句在句子中担任主语的角色,也就是说,它起着说明中心事实或判断的作用。

二、主语从句的结构1. 连接词 + 主语从句连接词即引导主语从句的词语,常见的连接词有that, whether, who, whom, whose, which, what等。

例如:What he said is true.(他说的是真的。

)2. 主语从句 + 谓语 + 宾语/表语主语从句通常接在谓语动词之后,谓语之后可以是宾语或表语。

例如:Who will win the game is not yet known.(谁将赢得比赛尚未得知。

)三、主语从句的用法1. 说明中心事实或判断主语从句通常用来说明一个中心事实或判断,表示一个动作或状态。

例如:What he does is none of my business.(他做的事对我无关。

)2. 引出提问有时候主语从句用来引出提问,表示对某一事实或情况的疑问。

例如:What happened to Tom is still a mystery.(汤姆发生了什么事情还是个谜。

)3. 引导宾语从句有时主语从句还可以引导宾语从句。

例如:What he said is not true.(他说的不是真的。

)4. 引导表语从句主语从句也可以引导表语从句。

例如:What I want is a peaceful life.(我想要的是一种和平的生活。

)1. 主语从句中的谓语动词应该根据主语从句的人称和数保持一致。

例如:What he says is true.(他说的是真的。

)2. 主语从句中的连接词不能省略。

例如:I don’t know who will come.(我不知道谁会来。

)3. 主语从句中的连接词有时候可以省略。

高中英语主语从句知识点整理

高中英语主语从句知识点整理

高中英语主语从句知识点整理1. 定义:用作主语的从句叫做主语从句。

2. 构成:关联词+简单句3.引导主语从句的关联词有三类:(1) 从属连词that。

例如:that they were in truth sisters was clear from the facial resemblance between them. 很明显,她们确是亲姐妹,她们的脸型很相似。

(2) 从属连词whether。

例如: whether he'll come here isn't clear. 他是否会来这里还不清楚。

(3) 连接代词:who whom whose whatwhich whoever whatever whichever连接副词:where when how why例如:what she did is not yet known. 她干了什么尚不清楚。

how this happened is not clear to anyone. 这事怎样发生的,谁也不清楚。

whoever comes is welcome. 不论谁来都欢迎。

wherever you are is my home ---- my only home. 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(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。

例如:it is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。

it is probable that he told her everything. 很可能他把一切都告诉她了。

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主语从句在从句中充当主语的复合句,主语即为主句动作的发出者或状态的持有者。

有两种形式:直接放句首;it 为形式主语,真正的主语在句子后(为了避免头重脚轻)。

主语从句时态不受主句的限制。

(一)连接词引导的主语从句主语从句在复合句中作主句的主语,引导主语从句的词有从属连词that, whether以及连接代词who, what, which, whoever, whatever, whichever和连接副词when, where, why, how等.连接词引导的从句That light travels in straight line is known to all.我们都知道光是以直线传播的。

Whether he will join us is still a question.他是否会加入我们仍是个问题。

连接代词引导的从句Who will be sent there has not been decided.大家还没有决定谁会被送过来。

(主语)What you need is more practice. 你需要更多的练习。

(宾语)Whatever we do is to serve the people.我们无论做什么都是为了服务人民。

(宾语)Which is the best is not clear.我们不清楚哪个最好。

(主语)连接副词引导的从句Where he has gone is a question.我们不知道他去哪儿了。

(地点状)How he can earn a living in London remains a big problem. 如何在伦敦谋生仍是个大问题。

(方式状)When we shall have our sports meet is a mystery. 什么时候会开运动会仍是个迷。

(时间状)注意:在主语从句中,为了避免头重脚轻的问题,常用it为形式主语,真正的主语在句子后。

(上述的例子转换)(二)总结it为形式主语的结构:1)It is + adj. / n. +从句It is a pity/shame that...遗憾的是……It is possible that...很可能……It is unlikely that...不可能……2)It +不及物动词+从句It seems/appears that...似乎……It happened that...碰巧……3)It + be +过去分词+从句It is said that...据说……It is known to all that...众所周知……It is reported that...据报道……It is believed that...据信……;人们相信……It is suggested that...有人建议……It must be pointed out that...必须指出……It has been proved that...已证明…….例如:It is believed that at least a score of buildings were damaged or destroyed.据信,至少有二十座楼房遭到破坏或彻底毁掉.It is suggested that the meeting should be put off.有人建议会议延期召开.It's reported that three people were killed in the accident and five were hurt badly.据报道,事故中三人丧生,五人重伤.It is known to all that Taiwan is an inseparable part of China.众所周知,台湾是中国不可分割的一部分.(三)学习主语从句应该注意的几个问题1)引导词that与whatwhat既有引导主语从句的作用,同时又在从句中作句子成分(主语、宾语、表语等).这时what相当于all that/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句子成分.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.What we can't get seems better than what we have.我们得不到的东西似乎比已得到的要好.That we should work out a plan to deal with the present serious situation is important.我们应该制定一项计划来应付目前严峻的形势,这一点非常重要.That a new teacher will come to teach us geography is true.一位新老师将来教我们地理,这是真的.2)引导词if和whetherif和whether引导动词后的宾语从句时一般可通用,但介词后的宾语从句、主语从句(放在句首时)、表语从句常由whether引导.例如:Whether she will go home or not is unknown.她是否回家还不得而知.Whether we shall raise ducks or geese remains to be decided.我们是养鸭还是养鹅仍没决定.=It remains to be decided whether/if we shall raise ducks or geese.但我们不能说If we shall raise ducks or geese remains to be decided.3)其它引导词连接代词who, which, whom, whose有各自的意义,起连接作用,并在从句中充当语、宾语、表语、定语等;连接副词when,where, why, how等有各自的意义,起连接作用,并在从句中充当状语.(四)语气在It is necessary / natural / important / strange...+ that-clause这类句型里,that所引导的主语从句中谓语动词用"should +原形",表虚似语气.例如:It is necessary that the problem should be settled at once.这个问题必须马上解决.It's strange that he should have gone away without telling us.他竟然没向我们说一声就走了,真是奇怪.(五)以it作形式主语的主语从句与强调句型的区别"It be + adj./n. + that-clause"与强调句型均有It be...that...之类的语言标志,但不同的是:①前者中的that从句是主语从句.若删掉其中的It be和that,则剩余部分不论结构还是语意都不能成为一个句子;但若将后者中的It be和that去掉,则剩余部分的结构和语意仍能构成一个完整的句子.②强调句型译为汉语时可加上"正是……"或"就是……"之类的字眼,而主语从句则不可以.请比较下面两个句子:It is surprising that Mary should have won first place.令人惊奇的是玛莉竟然获得了第一名.It is Mary that has won first place.正是玛莉得了第一名.补充强调句:it引导的强调句与it做形式主语的复合句不可混淆。

it引导的强调句是对句子某一成分强调,对主语为人强调用who,that都可,对其他只用that,(去掉it is that 句子仍完整)I met John in the street yesterday. 我昨天在街上看见了John.It was I that (who) met John in the street yesterday. 是我昨天在街上看到了John。

(强调主语)It was John that I met in the street yesterday. 我昨天在街上看到的是John。

(强调宾语)It was in the street that I met John yesterday. 我昨天看到John在街上。

(强调地点状)It was yesterday that I met John in the street.昨天,我在街上遇见了John。

(强调时间状)作业:一、1. _____ as much as one-fifth of all timber harvested is not used.A. The estimateB. The estimateC. They are estimatedD. It is estimated that2. _____ was once regarded as impossible has now become a reality.A. ThatB. WhichC. WhoD. What3. _____ we have achieved is attributed to the guidance of our parents.A. WhoeverB. WhateverC. HoweverD. That4. _____ you say now can’t make up for what you’ve done.A. No matterB. WhateverC. HoweverD. That5. Although _____ happened in this developed country sounds like science fiction, it could occur elsewhere in the world.A. whichB. whatC. howD. it6. _____ she had forgotten to take her notebook.A. That occurred to herB. She occurred thatC. To her that occurredD. It occurred to her that7. I am sure that _____ she said is wrong.A. whichB. allC. thisD. what8. We lost our way in the forest, and _____ made matters worse was that it was getting dark.A. thatB. whichC. itD. what9. _____ occurred to him that he had forgotten to lock the door when he left home.A. ThisB. ItC. ThatD. These10. _____ or not is still uncertain.A. He’s comingB. If he is comingC. That comingD. Whether he’s coming11. It’s _____ he’ll be able to come.A. doubt whetherB. doubtfulC. doubt itD. doubtful whether12. It is _____ that the bridge has existed for more than three centuries .A. appearedB. risenC. saidD. born13. _____ he saw both surprised and frightened him.A. ThatB. WhenC. WhatD. Which14. _____ is a spell of warm sunshine.A. What do we all need.B. What all we needC. What we needD. What we all need15. _____ is a pity that he should feel so upset.A. WhatB. ThatC. HeD. It二、用适当的词填空,使句子意思完整。

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