(完整)高中英语主语从句全面讲解
主语从句知识点总结文档
主语从句知识点总结文档一、主语从句的基本语法结构主语从句一般由连词that来引导。
引导词that不作其他任何成分,所以that很容易被忽略。
但有些从句可以用whether来引导,意思和that引导的主语从句相同。
从句的谓语用陈述语序,即“主语+谓语+宾语”的顺序。
例如:1. That he will come to see us is certain.(他会来看我们,是肯定的。
)2. That you can be happy is certain.(你能够幸福,是肯定的。
)3. Whether he will come to see us is uncertain.(他是否会来看我们,是不确定的。
)现在,让我们来详细介绍主语从句的用法。
二、主语从句的用法1. 主语从句在句中作主语,句子的谓语动词单数或者复数形式由主语从句的内容决定,因此主语从句的内容可以看作整个句子的主语。
例如:(1)What he said was true.他说的是真的。
(2)That he can speak Chinese is a fact.他会说汉语是一个事实。
(3)Whether she will come to the party is still unknown.她会不会来参加派对还不确定。
2. 主语从句的语序不可颠倒,即主语从句的语序是“引导词+主语从句”,而不是“主语从句+引导词”。
例如:(1)That he doesn’t like the movie is certain.(正确)He doesn’t like the movie is certain that.(错误)3. 在口语中,可以省略关系词that,但在书面语中,尽量不省略。
例如:He said he would come.(口语)He said that he would come.(书面语)4. 主语从句中的谓语动词要用陈述语序。
例如:(1)Why he did it is still unknown.(正确)Why did he do it is still unknown.(错误)5. 主语从句的从句中如果有主语和谓语,则主语放在谓语前。
高中英语语法主语从句讲解
主语从句一、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、同位语从句、表语从句和宾语从句。
二.主语从句主要有四类:(1)由连词that引导的主语从句:引导词that无含义/在句中不做成分/不可以省。
例如:That you will win the medal seems unlikely.That you are so indifferent bothers me.That she survived the accident is a miracle.(2)用连词whether 引导的主语从句: whether有含义(是否)/在句中不做成分/不可以省。
注意:引导主语从句,不能用if,只能用whether。
例如:Whether we will hold a party in the open air tomorrow depends on the weather.Whether she is coming or not doesn’t matter too much.(3)用连接代词引导的主语从句在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中,其连接代词在句中起名词性作用,担当一定成分.例如:What you need is more practice.What I want to know is this.Whatever we do is to serve the people.注:whatever / whoever的功用whatever, whoever在主语从句中不含疑问意义。
它引导主语从句,并在从句中作主语、宾语、表语等。
whatever = anything that; whoever = anyone who。
高中英语主语从句讲析课件可修改全文
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
(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。
(完整版)主语从句详解+例句
(完整版)主语从句详解+例句主语从句是复合句中的一个重要成分,由一个从句作为主语,起到句子中主语的作用。
本文将详细介绍主语从句的结构和用法,并提供一些例句进行说明。
1. 主语从句的结构主语从句由引导词和一个从句组成,引导词在句子中充当主语的角色。
常见的引导词有:- that- whether/if- who- whom- which- what- whoever- whatever主语从句的结构可以是以下几种形式:- 陈述句形式:[that + 陈述句]- 一般疑问句形式:[whether/if + 陈述句]- 特殊疑问句形式:[疑问词 + 陈述句]2. 主语从句的用法- 主语从句可以替代主句中的名词或名词短语作为主语,使句子更加简洁明了。
例如:- That he is late is unacceptable.(他迟到是不能接受的。
)- What you said surprised me.(你说的话让我很吃惊。
)- 主语从句常用于强调句型中,强调句型的结构为:[It + 系动词 + 主语从句 + 其他成分]。
例如:- It is important that we take action now.(我们现在采取行动是很重要的。
)- It doesn't matter what they think.(他们怎么想并不重要。
)3. 主语从句的例句- That he didn't show up was disappointing.(他没有露面是令人失望的。
)- Whether she will join us is still unknown.(她是否会加入我们还不知道。
)- Who will be the winner is yet to be determined.(谁将会是胜利者还有待确定。
)- It is surprising that they didn't invite him.(他们没有邀请他是令人惊讶的。
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。
高中英语主语从句 知识点讲解
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。
2023年高中英语语法精讲之主语从句详细讲解
2023年高中英语语法精讲之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?主语从句有哪几类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。
高考英语主语从句用法详解
高考英语主语从句用法详解主语从句用法详解:用法详解1:关系代词型what引导What we need is money. 我们需要的是钱。
What I want to know is this. 我想知道的就是这一点。
Whats done is done. 事已成定局。
What he says is not important. 他说的话并不重要。
What I am telling you is mere impressions. 我和你说的都不过是一些印象而已。
What make the river more beautiful are the lotus plants growing in the water. 为河水增色的是水里的荷花。
What you need is a good-sized canvas bag. 你需要的是一个比较大的帆布袋。
What I am afraid of is their taking him to Portugal. 我担心的是他们把他带到葡萄牙去。
What struck me was that they have all suffered a lot. 给我很深印象的是他们都受过很多苦。
用法详解2:连接副词引导When we arrive doesnt matter. 什么时候到没有关系。
How it was done was a mystery. 这是怎样做的是一个谜。
How this happended is not clear to anyone. 这件事怎样发生的,谁也不清楚。
How many people we are to invite is still a question. 邀请多少人还是一个问题。
Where I spend my summer is no business of yours. 我在哪里过暑假不关你的事。
用法详解3:连接代词引导Whoever is top from wins the game when two matched players meet. 两强相争勇者胜。
202X年高中英语语法精讲之主语从句详细讲解
千里之行,始于足下。
202X年高中英语语法精讲之主语从句详细讲解主语从句是指在一个句子中充当主语的从句。
下面是202X年高中英语语法精讲之主语从句的详细讲解:1. 主语从句的引导词:主语从句的引导词有:that, whether/if。
例如:- That he has passed the exam is good news.- Whether he will come to the party is still unknown.- If it will rain tomorrow worries me.2. 主语从句的用法:(1)主语从句可以替代整个句子作为主语。
例如:- What he said is true. (He said something.)- Whether you like it or not doesn't matter. (You like it or not doesn't matter.)(2)主语从句的谓语动词通常为单数形式,与从句中的主语一致。
例如:- What she wants is a new car. (What she wants = She wants a new car.)- Whether he is responsible for the accident is still under investigation. (Whether he is responsible for the accident = He is responsible for the accident.)3. 主语从句的位置:第1页/共2页锲而不舍,金石可镂。
通常,主语从句位于句首,后面跟着一个逗号。
但如果主句以it作为形式主语,主语从句则位于句尾。
例如:- How the accident happened is still a mystery. (主语从句位于句首) - It is a mystery how the accident happened. (主语从句位于句尾)4. 不定式作主语:不定式也可以作为主语,表示未定的动作或状态。
主语从句超全ppt课件
第二讲:主语从句的引导词及各 类主语从句
主语从句在复合句中作句子的主语。 引导主语从句的词有从属连词that, whether, if;连接代词who, whoever, whom, what, whatever, whose, which; 连接副词when, where, how, why等。
surprise/no wonder难怪/good news/a good thing/a question /that… …是事实
It is common knowledge that… …是常识
*_It__is__a__p_it_y__th__a_t_(很遗憾)we lost the match.
句子
简单句 复合句
并列句
形容词性从句 名词性从句 副词性从句
定语从句
主语从句 subject clause
宾语从句 object clause
表语从句 predicative clause
同位语从句 appositive clause
比较状语从句 地点状语从句 时间状语从句 让步状语从句 条件状语从句 目的状语从句 方式状语从句 结果状语从句 原因状语从句
*____I_t _is_r_e_p_o_rt_ed__th_a_t_(据报道)20 people were killed in the accident.
*___It_i_s_s_u_g_g_es_t_e_d_th_a_t__(建议)we should eat more vegetable and do more exercise.
特殊疑问句作主语
• 需要先将疑问句的倒装语序变成陈述句语 序。
Why dinosaurs became extinct is still a mystery.
高中主语从句用法归纳
高中主语从句用法归纳高中阶段的英语学习中,主语从句可是个让人又爱又恨的“小家伙”。
咱们今天就来好好归纳一下它的用法,让它变得乖乖听话!先来说说啥是主语从句。
简单来讲,就是在一个句子里,充当主语的是一个从句。
比如说,“What he said is true”在这个句子里,“What he said”就是主语从句,整个句子意思是“他说的是真的”。
主语从句的引导词那可是有不少,像 that、whether、who、what、which、when、where、why、how 等等。
咱一个个来瞧瞧。
先说that 引导的主语从句。
that 在从句中不作成分,没有实际意义,就只是起个引导作用。
比如“ That he will come is certain ”(他会来是肯定的)。
但要注意哦,that 引导的主语从句,经常会用 it 作形式主语,把真正的主语从句放在后面,像“ It is certain that he will come ”这样,是不是让句子看起来更舒服些?接着是 whether 引导的主语从句,whether 表示“是否”。
“Whetherwe will go for an out ing tomorrow remains unknown ”(我们明天是否去郊游还不知道呢)。
再来说说 who 引导的主语从句,who 指人,在从句中作主语。
像“Who will be our monitor hasn't been decided yet ”(谁将成为我们的班长还没决定)。
what 引导的主语从句呢,what 在从句中作主语、宾语或表语。
比如说“ What she lacks is experience ”(她缺少的是经验),这里 what 作宾语。
which 引导的主语从句,which 表示在一定范围内的“哪一个”。
“Which book is the best one is still a question ”(哪一本书是最好的还是个问题)when、where、why、how 引导的主语从句,分别表示时间、地点、原因、方式。
高中英语知识点归纳主语从句的用法
高中英语知识点归纳主语从句的用法主语从句是英语语法中的一个重要知识点。
它用于修饰主句的主语,并在句子中起到名称、代词或名词性从句的作用。
通过使用主语从句,可以使句子结构更加丰富多样,表达更加具体清晰。
下面是对主语从句的用法进行归纳总结。
1. 引导主语从句的连接词:主语从句通常由从属连词引导,常用的引导词有:- That:常用于陈述句中,作为连接词引导主语从句。
例如:“That he is a talented singer is widely known.”- Whether/if:用于疑问句或选择句中,引导主语从句。
例如:“Whether he will come or not is still uncertain.”- Who/whom/whose:用于引导讨论人的主语从句。
例如:“Who will be the next president is under discussion.”- What/which:用于指代事物的主语从句。
例如:“What happened yesterday is beyond my control.”2. 主语从句在句子中的位置:主语从句通常在句子中作为主语出现,放在句首。
例如:“Why he left in such a hurry is still a mystery.”3. 动词形式与主语从句:主语从句的谓语动词形式与从句中的主语保持一致,即采用单数或复数形式。
例如:“What I want is a peaceful life.”4. 主语从句的时态:主语从句的时态通常与主句时态保持一致。
例如:“That she has passed the exam is a great relief to her parents.”5. 特殊情况下的主语从句:在某些特殊情况下,主语从句中的谓语动词应为不定式形式。
如:- It + be + 原形动词 + that从句:例如“It is important to study hard.”- There + be + 名词 + that从句:例如“There is no doubt that he is telling the truth.”通过对主语从句的学习与理解,可以更好地运用它,丰富句子结构,使语言表达更加准确、流畅。
高中英语会考主语从句知识点总结
高中英语会考主语从句知识点总结在学习中,大家都背过不少知识点,肯定对知识点非常熟悉吧!知识点也不一定都是文字,数学的知识点除了定义,同样重要的公式也可以理解为知识点。
你知道哪些知识点是真正对我们有帮助的吗?下面是作者为大家收集的高中英语会考主语从句知识点总结,供大家参考借鉴,希望可以帮助到有需要的朋友。
知识点总结1: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。
作形式主语和it引导强调句的比较It 作形式主语代替主语从句,主要是为了平衡句子结构,主语从句的连接词没有变化。
而it引导的强调句则是对句子某一部分进行强调,无论强调的是什么成分,都可用连词that。
被强调部分指人时也可用who。
例如:a) It is a pity that you didn’t go to see the film.你不去看那场电影真可惜。
b) It doesn’t interest me whether you succeed or not.我对你成功与否不感兴趣。
c) It is in the morning that the murder took place.谋杀案是在早上发生的。
(强调句型)d) It is John that broke the window.是John打碎的窗户。
(强调句型)2.用it 作形式主语的结构(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 mon knowledge that …是常识(2) It is + 形容词 + 从句It is natur al 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 appears that… 似乎…(4) It + 过去分词 + 从句It is reported that… 据报道…It has been proved that… 已证实…It is said that… 据说…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。
(完整版)主语从句知识点大全
(完整版)主语从句知识点大全主语从句知识点大全
主语从句是复合句中最常用的从句之一,它在句中充当主语的成分。
下面是一些主语从句的知识点:
1. 主语从句的引导词:
- 连接代词:that, whether, who, whom, whose, which, what, whichever, whatever
- 连接副词:why, when, where, how
2. 位置:
主语从句通常出现在句首,但也可以出现在句中或句尾。
3. 用法:
主语从句可以代替一个句子或一个名词性词组作为整个句子的主语。
例如:
- What you said is true.(你说的是真的。
)
4. 时态和语态的变化:
当主语从句中的谓语动词表示客观事实、真理或普遍规律时,动词通常用一般现在时(注意,这里指的是从句中的动词,而不是主句的动词)。
例如:
- That she is knowledgeable is well-known.(她有学问是众所周知的。
)
- It is believed that the sun rises in the east.(人们相信太阳从东方升起。
)
5. 引导词的选择:
- 区别 that 和 whether:
- that 引导的主语从句一般用在陈述句中,表示“...是...”;
- whether 引导的主语从句一般用在疑问句中,表示“是否...”。
以上是关于主语从句的一些基本知识点,希望对你有所帮助!。
(完整版)主语从句
高中英语知识点讲义--—-主语从句一、教学目标1.知识目标:掌握主语从句的基本意义、形式,以及连接词的用法。
2.能力目标:会选定连接词,会运用主语从句进行口语或书面表达。
3。
情绪和态度目标:坚定学生学习英语语法的信心,从而激发学习英语语法的学习兴趣。
二、教学重难点1. 主语从句的连接词的选定。
2。
主语从句遵循的特点:陈述语气、缺什么补什么、不缺补that.3。
it做形式主语的情况。
三、教学步骤1、首先,我们来看下面几个例子,请大家找出划线部分词语在句子中所做的成分。
(1)Jeremy Lin is a basketball player.(2)Smoking is bad for you。
(3)To find your way can be a problem.(4)This is not funny at all。
2。
主语从句(一)定义:顾名思义,用作主语的从句就叫做主语从句.它是名词性从句的一种.(注意:名词性从句分为:主语从句、表语从句、宾语从句和同位语从句。
)(二)请看下面两个例子,大家便会对主语从句有一个初步概念.A。
The story makes me laugh。
(词组)B。
That he failed the test makes me laugh.(从句)(三)引导主语从句的连接词连词:that/ whether连接代词:who/ what/ which (在主语从句中做主语、宾语、表语、定语等)连接副词:when/ where/ how/ why(在主语从句中做状语)(即:7个wh-, 1个that, 1个how)3。
连接词的用法(一)thatThat作为从属连词引导主语从句时,其本身没有实际意义,只起到引导作用,也不充当从句的任何成分,但不能省略.如:That she left him made him heart-broken。
That you missed the film is really a pity.注意:为了防止句子头重脚轻,通常把形式主语it放在主语位置,真正的主语搁置于末尾.常用的句型有:(1)It + 系动词 + adj. + that从句常在此句式中的形容词有ture, certain, important, wonderful, funny, possible,natural, obvious, clear, strange, wrong, right, likely, probable等。
高中英语语法-主语从句(共22张PPT)
7
When he will be back depends on the weather. Where the test will be given is not yet decided. Where and when he was born is a secret. Why he came here is not known. How we can protect the endangered animals
turning white.
√ A. while B. that
C. if
D. for
5._______ he said at the meeting shocked
everybody present.
√A. What B. That C. The fact D. The matter
6._________ we can't get seems better than
9
四、it 可作形式主语
为了使句子保持平衡,避免头重脚轻,经常用 it 作形式 主语,主语从句放在后面作真正的主语. 其结构为:
It + 谓语动词/系动词 + 宾语/表语 + 主语从句. 例如:
That we shall be late is certain. = It is certain that we shall be late. 1. That the earth is round is known to all. = It is known to all that the earth is round. 2. whether they would support us was a problem . = It was a problem whether they would support10us.
(完整)高中英语主语从句全面讲解
(完整)高中英语主语从句全面讲解语法——Noun clauses as the subject主语从句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。
①That he finished writing the composition in such a short time surprised us all.②What we need are good doctors.③Whom we must study for is a question of great importance.1.主语从句的连接词1).连接词: that, whether①.That he will win is certain.②.Whether he’ll join us in the discussion is of great importance.2).连接代词: who, what, which, whom , whose, whoever, whatever, whichever①.It is clear who is afraid of having a change in land ownership.②.What India needs is a law to make land ownership fairer.3).连接副词: when, where, why, how, how many, how much , how long, how soon, how often①When we’ll start tomorrow wil l be told soon.②Where we can buy oxen is something we need to find out.③Why he came here is not known.④How we can protect the grain from damp needs to be discussed.【连接词】1. that——That t he earth moves around the sun is well known.2. whether——Whether he will come or not is not known yet.3. who ——Who will be sent there has not been decided.4. what——What you need is more practice.5. which——Which one is the best is not clear.6. when, where ——Where he has gone is a question.7. why, how——Why there is gravity is hard to understand.How he can earn a living in Britain remains a big problem.8. whoever、whatever、whichever可引导主语从句。
高中英语知识点归纳主语从句的引导词与用法总结
高中英语知识点归纳主语从句的引导词与用法总结主语从句是英语中常见的一种从句类型,用于引导句子的主语。
它可以由多个引导词来引导,这些引导词在语法和用法上略有不同。
本文将对高中英语中主语从句的引导词和用法进行总结。
一、引导词的分类主语从句的引导词可以分为以下几类:1. Wh-引导词:who, whom, whose, which, what, when, where, why, how等。
这类引导词通常用于提问,引导主语从句时可以替代句子中的主语部分,用来引导对主语进行提问的从句。
2. Whether和if:这两个引导词在引导主语从句时可以互换使用,用于表示“是否”的意思。
通常用在动词后面,引导一个带主语从句的宾语。
3. It:主语从句中的主语部分有时可以用it来表示,特别是当主语从句较长或复杂时,为了简化句子结构,可以用it作为形式主语。
4. That:that可以引导主语从句,表示“那”,用于强调主语从句的真实性和确定性。
二、用法总结1. Wh-引导词的用法:a) Who, whom, whose用于引导指人的主语从句。
例如:Who is going to the party?b) Which用于指物的主语从句。
例如:Which book is on the table?c) What用于引导不定性的主题从句,通常可以替代who或which。
例如:What makes you think that?d) When用于引导表示时间的主语从句。
例如:When is the meeting?e) Where用于引导表示地点的主语从句。
例如:Where is the nearest hospital?f) Why用于引导表示原因的主语从句。
例如:Why did she leave early?g) How用于引导表示方式、方式和程度的主语从句。
例如:How she won the competition remains a mystery.2. Whether和if的用法:a) Whether和if都可用于引导主语从句,表示“是否”。
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语法——Noun clauses as the subject主语从句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。
①That he finished writing the composition in such a short time surprised us all.②What we need are good doctors.③Whom we must study for is a question of great importance.1.主语从句的连接词1).连接词: that, whether①.That he will win is certain.②.Whether he’ll join us in the discussion is of great importance.2).连接代词: who, what, which, whom , whose, whoever, whatever, whichever①.It is clear who is afraid of having a change in land ownership.②.What India needs is a law to make land ownership fairer.3).连接副词: when, where, why, how, how many, how much , how long, how soon, how often①When we’ll start tomorrow will be told soon.②Where we can buy oxen is something we need to find out.③Why he came here is not known.④How we can protect the grain from damp needs to be discussed.【连接词】1. that——That t he earth moves around the sun is well known.2. whether——Whether he will come or not is not known yet.3. who ——Who will be sent there has not been decided.4. what——What you need is more practice.5. which——Which one is the best is not clear.6. when, where ——Where he has gone is a question.7. why, how——Why there is gravity is hard to understand.How he can earn a living in Britain remains a big problem.8. whoever、whatever、whichever可引导主语从句。
Whoever comes will be welcome. Whatever he did was right. Whichever of you comes in will receive a prize. 【小结】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, 但在连接代词what引导的主语从句后谓语动词的数要根据句意而定。
★为了防止句子头重脚轻,通常把形式主语it 放在主语位置,真正主语后置。
1. It is certain that he will win the match.2. It is true that he has made a very important discovery in chemistry.3. It is very likely that they will hold a meeting.4. It is strange that the man should have stuck to his silly ideas.5. It is a pity that we won't be able to go to the south to spend our summer vacation.6. It is still a mystery what caused the accident.7. It is said that he has gone to Shanghai.8. It seems that he has seen the film.【小结】1.以that 引出的主语从句,常以形式主语it引导, 结构为:It is +形容词/名词/某些动词ed + that 从句。
2.在有些that从句中要用虚拟语气 (should +do/should +have done)。
★用it 作形式主语的结构(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 +不及物动词+从句It seems that…似乎…It happened that…碰巧…It appears that…似乎…(4) It +be+ 过去分词+从句It is reported that…据报道…It has been proved that…已证实…It is said that…据说…★“It”作形式主语代替主语从句的常见句型举例①It’s + adj. + that / wh- clausee.g. It’s clear / natural / certain that clauseIt’s obvious that money doesn’t grow on trees.②It’s + p.p. + that / wh- clausee.g. It’s said / reported / known that clauseIt’s believed that he will come next week.③It ‘s + n. + that / wh- clausee.g. It’s a shame / an honour / good news that clauseIt’s still a question when we’ll have our meeting.④It + v. (n. / pron.) that /wh- clausee.g. It made us very happy that she was chosen.It appears that he forgot to sign the letter.★whether与if均为“是否”,但下列情况下只用whether:1. 引导主语从句并在句首——Whether he will come is not clear.2. 引导表语从句——The question is whether he’ll come.3. whether从句作介词宾语——I’m not sure about whether we’ll win.4. 引导让步状语从句时——Whether you like it or not, you’ll have to do it.【注意事项】1. 主语从句位于句首时必须由连接词引导。
2. 主语从句后置时引导词that可省略。
3. 主语从句位于句首时,不能用if 引导。
4. 主语从句后置时, 可以用if引导。
练一练1. What makes this shop different is that it offers more personal services.2. These wild flowers are so special I would do whatever I can to save them.3. It is required in the regulations that you should not tell people the passport of your e-mail account.4. It is pretty well understood what controls the flow of carbon dioxide in and out of the atmosphere today.5. What made the school proud was that more than 90% of the students had been admitted to key universities.6. It now appears that they are in need of help.7. Whoever knows the truth will tell you about it.8. It is good news that they will arrive in a few days.Use the words below to fill in the blanks1. ______ watch was lost is unknown.2. ________ you did is right.3. _________ we will go for an outing tomorrow remains unknown.4. ______ we need is time.5. ______ will be our monitor hasn't been decided yet.whether what who whose whatever.WhetherWhatWhateverWhoseWho上面的空大家都填对了吗?上面每个句子都出现了的主语从句,大家能找到吗?1. Whose watch was lost is unknown.2. Whatever you did is right.3. Whether we will go for an outingtomorrow remains unknown.4. What we need is time.5. Who will be our monitor hasn't beendecided yet.1. Whose watch was lost is unknown.2. Whatever you did is right.3. Whether we will go for an outingtomorrow remains unknown.4. What we need is time.5. Who will be our monitor hasn't been decided yet.2. 在有些that从句中要用虚拟语气(should +do/should +have done)。