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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。
(3)以关系代词what, whatever, whoever, whomever, whichever引导的主语从句不能用形式主语it 引导，它们在句子中担任成分，不能省略，语序为陈述语序。
e.g What he said at the meeting is important.他在会上所说的事情是重要的。
Whoever leaves the office should tell me.无论是谁离开办公室都应该告诉我。
(4)用it作形式主语的主语从句结构
a. 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
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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。
b. 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。
c. 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. 过去一直认精品文档．
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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。
d. 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。
e. It +某些固定结构+ 主语从句。
It doesn't matter……是无关紧要的……
It makes no difference……毫无区别……
It doesn't make too much difference that…………关系不大
It doesn't need to be bothered that……不必担忧……
例如：
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。
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2. 宾语从句
用作宾语的从句叫宾语从句。
1.引导宾语从句的关联词有三类：
(1) 从属连词that。如：
He told us that he felt ill. 他对我们说他感到不舒服。
I know he has returned. 我知道他已经回来了。
注：that在引导宾语从句时也并不是任何情况下都可以省略。在以下情况下，that不能省略。1. Everybody could see what happened and that Tom was frightened. 大家都会看出所发生的事情
并知道Tom非常害怕。
and连接两个宾语从句，that宾语从句放在and的后面时，that不能省略。
2. I know nothing about him except that he is from the south. 对他我一无所知，只知道他是南方人。that引导的宾语从句作介词宾语时，that不能省略。
3. That he ever said such a thing I simply don't believe. 我简直不相信他曾说过这样的话。
that从句位于句首时，that不可省略。
4. We decided, in view of his special circumstances, that we would admit him for a probationary
period. 鉴于他的特殊情况，我们决定应允他一段试用期。
主句谓语动词与that从句之间有插入语，that不可省略。
(2)从属连词if/whether。如：
I doubt whether he will succeed. 我怀疑他是否会成功。
I don't know if you can help me. 我不知道你能否帮助我。
(3)连接代词who, whom, whose, what, which, whoever, whatever, whichever
连接副词where, when, how, why。
e.g Who or what he was, Martin never learned. 他是什么人？他是干什么的？马丁根本不知道。
I wonder what he's writing to me about. 我不知道他要给我写信说什么事。
I'll tell you why I asked you to come. 我会告诉你我为什么要你来。
2. 介词宾语从句
宾语从句也可用作介词的宾语。如：
He was deeply displeased by what had occurred that day.他对那天发生的事感到很不快。
I walked over to where she sat. 我走向她坐的地方。
有时介词可以省略。如：
I don't care (for) who marries him. 我不管谁跟他结婚。
Be careful (as to) how you do that. 你要注意做这件事的方式.
注意：连词that引导的名词性从句很少作介词的宾语，只用在except, but, in后。其他一些精品文档．
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介词的宾语从句如果由连词that引导，则需用it先行一步，作形式宾语。
如：He is a good student except that he is careless.他是一个好学生，只是有点粗心。
You may rely on it that I shall help you. 你可以指望我会帮助你的。
3. 动词＋it＋that结构
如果宾语从句后还有宾语补足语，则用it作形式宾语，而将宾语从句后置。如：
We thought it strange that Xiao Wang did not come yesterday.我们认为小王昨天没来是奇怪的。He has made it clear that he will not give in.他已表明他不会屈服。
4. 某些形容词或过去分词后常接宾语从句，这类形容词或过去分词有sure, glad, certain, pleased, happy, afraid, surprised, satisfied等，连词that可省略。如：
I am not sure what I ought to do.我不能确定我该做什么。
I'm afraid you don't understand what I said.恐怕你没领会我说的意思。
I'm surprised that I didn't see all that before.我好奇怪，我以前没看到过。
5. 连词whether (…or not)或if引导的宾语从句
if和whether引导的宾语从句可以互换使用，但whether常和or not连用，if一般不与or not连用。如：
I wonder whether it is true or not. 我不知它是真是假。
用if引导宾语从句如果会引起歧义，应避免使用if而用whether。试比较：
Please let me know if you want to go.
Please let me know whether you want to go.
(if从句可理解为宾语从句，意为“请告诉我你是否想去”；此句又可理解为条件状语从句意为
“如果你想去的话，请告诉我一声”。)
6. 宾语从句的否定转移。在think, believe, suppose, expect等动词后的宾语从句，有时谓语尽管是否定意思，却不用否定形式，而将think等动词变为否定形式。如：
I don't think you are right. 我认为你错了。
I don't believe they have finished their work yet. 我相信他们还未完成他们的工作。
3. 表语从句
表语从句放在连系动词之后，充当复合句中的表语, 一般结构是“主语＋连系动词＋表语从句”。可接表语从句的连系动词有be，look，seem，sound，appear等。
如：China is no longer what she used to be.
今日的中国不再是过去的中国了。
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The question remains whether they will be able to help us.
问题还是他们能否帮我们。
At that time，it seemed as if I couldn't think of the right word. 当时，我似乎怎么也想不出一个恰当的字眼来。
引导表语从句的关联词的种类：
(1）从属连词that
e.g The trouble is that I have lost his address. 麻烦是我把他的地址丢了。
that是连词,没有词义，在句中不作成分，因此一般不可省略(但在口语中有时that可省略)。
(2) 从属连词whether，as，as if / though引导的表语从句。
如：He looked just as he had looked ten years before.他看起来还与十年前一样。
It sounds as if someone is knocking at the door.听起来好像有人在敲门。
(3) because，why引导的表语从句。
如：That's because he didn't understand me.那是因为他没有理解我（That's because…强调原因）That's why he got angry with me.那正是他对我生气的原因。（That's why…强调结果）
注意：表示结果或名词reason作主语时，后面的表语从句表示原因时要用that引导，不宜用because.
如：The reason why I was sad was that he didn't understand me.我难过的原因是他没有理解我。
(4) 连接代词who，whom，whose，what，which，whoever，whatever，whichever
连接副词where，when，how，why
e.g The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。
The question is how he did it. 问题是他是如何做此事的。
That was what she did this morning on reaching the attic. 那就是她今晨上了阁楼干的。
(5) 使用虚拟语气的表语从句
在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形”表示，should可省略。常见的词有：advice，suggestion，order，proposal，plan，idea等。
e.g My suggestion is that we （should）start early tomorrow. 我的建议是我们明天一早就出发。
4. 同位语从句
英语中有一些名词如fact, idea, news, word, hope, promise, suggestion, reply, problem, belief, doubt, truth, order, thought等，它们本身有一定的意义，但表达得不够具体。为了使其表达的意义更加具体明确，其后常跟有一个从句，用来补充说明该名词的内容，这个从句就叫做同精品文档．
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位语从句。
(1) 同位语从句的引导词
①表示陈述意义时通常用that。注意that不能省略。
同位语从句说明的名词常见的有：ability, advice, answer, belief, doubt, discovery, fact, fear, hope, idea, information, message, news, order, possibility, problem, proposal, question, story, suggestion, theory, thought, word(消息)等,同位语从句一般都是用来解释说明一些抽象名词，而不可说明的名词是不会接同位语从句的。比如：man, water, sun等具体的人或事物。
e.g There is no doubt that the prices of cars will go down.
The belief that the company will make a great is shared by everyone.
②表示“是否”的意思时只能用whether，不能用if。这一点与主语从句相似。
e.g The question whether he can finish the work within two days remains unknown.
③表示疑问时也可用其他引导词where, when, why, how, who, what来引导。
e.g This student asked a good question why pollution can't be stopped.
I have no idea where I should go.
I have no idea how I can get to the railway station.
(2) 同位语从句和定语从句的区别
①定语从句相当于一个形容词, 它对先行词起修饰、描述和限制的作用。同位语从句相当于名词，属于名词性从句，它是对前面名词内容的具体表述，它们之间的关系是同位关系。试比较：The news that you heard is not true. 你听到的那个消息不是真的。（定语从句）
The news that he has died is true. 他已经去世的消息是真的。（同位语从句，说明了news 的具体内容，即he has died）
②同位语从句常跟在news, fact, promise, idea, word, message, hope, truth, answer, proposal, suggestion, order, information 等少数名词之后，而一般名词之后都可跟定语从句。
e.g He didn't give the answer why he was late. 他没回答他为什么迟到这个问题。（同位语从句）Then rose a question where we should go. 于是产生了一个问题：我们该到哪里去？（同位语从句）③that 在定语从句中充当某一成分, 是关系代词; that 在同位语从句中不作任何成分，仅把主句与从句连接在一起，是从属连词。如：
The fact that just now you talked about interests me. 你们刚才谈论的事情使我感兴趣。（定语从句）The fact that he failed in the exam made his parents very angry. 他考试没及格这个事实使他的父母很生气。（同位语从句）
④when, where, why, how, who, whom, which 如果引导定语从句, 它们分别指前面先行词所精
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表示的时间、地点、原因、方式、人和物，否则引导的就是同位语从句。试比较：
I still remember the day when he was killed. 我还记得他被害的那一天。(定语从句)
I have no idea when he was killed. 我不知道他什么时候被害的。（同位语从句）
They didn't go to the town where they were born.他们没有去他们出生的小镇。(定语从句)
They didn't answer the question where they were born.他们没有回答他们在哪里出生这个问题。（同
位语从句）
⑤whether, what 可引导同位语从句，但通常不可引导定语从句。
e.g We have no information whether he is alive. 我们不知道他是否活着。（同位语从句）
Next comes the question what step we should take. 接着的问题是我们下一步该做什么。（同
位语从句）
二．定语从句
定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
关系代词有：who, whom, whose, that, which等。
关系副词有：when, where, why等。
1. 关系代词引导的定语从句
关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。
1）who, whom, that 这些词代替的先行词是人的名词或代词，在从句中所起作用如下：
e.g Is he the man who/that wants to see you?他就是你想见的人吗？（who/that在从句中作主语）
He is the man whom/ that I saw yesterday.他就是我昨天见的那个人。（whom/that在从句中作宾语）
2) Whose 用来指人或物，(只用作定语, 若指物，它还可以同of which互换）。
e.g They rushed over to help the man whose car had broken down.那人车坏了，大家都跑过去帮忙。
Please pass me the book whose (of which) cover is green.请递给我那本绿皮的书。
3）which, that 它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等，例如：
A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未
有的繁荣。（which / that在句中作宾语）
The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。(which / that在句中作宾语）
2. 关系副词引导的定语从句
关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。
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1）when, where, why 关系副词when, where, why的含义相当于介词?桷捩屨结构，因此常常和介词?桷捩屨结构交替使用.
e.g There are occasions when (on which) one must yield.任何人都有不得不屈服的时候。
Beijing is the place where (in which) I was born.北京是我的出生地。
Is this the reason why (for which) he refused our offer?这就是他拒绝我们帮助他的理由
吗？
2）that代替关系副词
that可以用于表示时间、地点、方式、理由的名词后取代when, where, why和介词?桷捩屨引导的定语从句，在口语中that常被省略.
e.g His father died the year (that / when / in which) he was born.他父亲在他出生那年逝世了。
He is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他
【英语】英语名词性从句解题技巧讲解及练习题(含答案) 一、初中英语名词性从句 1．_______ makes me feel worried is _______ singing stars are centered on by masses of teenagers today. A. What; what B. That; that C. What; that D. That; what 【答案】 C 【解析】【分析】句意：让我感到担忧的是，今天的歌星是以青少年为中心的。分析句子可知，主语从句中的谓语动词makes 缺少主语，主语从句中缺少宾语一般用what，因此选择 what 来引导主语从句；系动词 is 后面的表语从句句意完整，不缺少成分，因此选择 that 引导表语从句。分析选项可知C项符合题意，故选C。 【点评】考查名词性从句，本题涉及what引导的主语从句和that引导的表语从句的应用。 2．________ is known to us all that the old scientist, for ________ life was hard in the past, still works hard in his eighties. A. As; whose B. It; whose C. As; whom D. It; whom 【答案】 D 【解析】【分析】句意：我们都知道，那位老科学家，过去生活很艰苦，到了八十多岁还在努力工作。第一空it is known to us all that…是个固定句型，意为“众所周知…”；第二空为介词+关系代词引导的定语从句，先行词the old scientist指人，作介词for的宾语，只能用whom，故选D。 【点评】考查名词性从句和定语从句，本题涉及固定句式it is known to us all that…和whom引导的限制性定语从句。 3．Some people believe _______ has happened before or is happening now will repeat itself in the future. A. whatever B. whenever C. wherever D. no matter what 【答案】 A 【解析】【分析】句意：一些人认为之前发生的或现在正在发生的任何事情在将来都会重复发生。Whatever has happened before or is happening now是一个主语从句，whatever既引导起这个主语从句，也在句中做主语。BC项都属于副词的性质，都不能做主语，通常只能做状语；no matter what只能用来引导状语从句，故选A。 【点评】考查名词性从句，本题涉及"特殊疑问词+ever"引导的主语从句。 4． is even more important is the earth cooled down, water began to appear on its surface.
【宾语从句】 在英语中，有简单句(只含一个谓语动词)、并列句(用连词连接，含不止一个谓语动词)和复合句(含从句)。本节课我们复习复合句里面的宾语从句 ．．．．。 如：She knows that he will come back soon. I’m afraid that I can’t go to your party. 1.宾语从句的【引导词】 宾语从句的引导词分三种。 ●(1) 如果从句是陈述句，引导词用that.（that在口语中常省略） 主句：He says... 从句：He is tired of playing computer games. → He says that he is tired of playing computer games. ●(2) 如果从句是一般疑问句，引导词用if/whether，表示“是否”。 主句：I don’t know… 从句：Does Tom likes fish? → I don’t know if / whether Tom likes fish. 【注意】① whether引导的从句常与or not连用，而if不能； ②宾语从句可简化为whether to do的搭配，而没有if to do这种搭配. 如：Could you tell me whether I should finish my homework today or not? Could you tell me whether to finish my homework today? 【拓展】if有两个意思： 1. 表示“是否”，引导的是宾语从句。动词的时态视情况而定。 2. 表示“如果”，引导的是条件状语从句，时态用一般现在时表示将来（遵循“主将从现”规则）。 经典例题：--Do you know if Tom ____________(go) hiking with us ? --I’m not sure. But i f he ____________(go), I will take many photos with him . ●(3) 如果从句是特殊疑问句，直接用该疑问词来引导。 主句：Do you know… 从句：what does he want to buy? → Do you know what he wants to buy? 你知道他想要买什么吗？ 2. 宾语从句的【时态】 ■(1) 当主句是一般现在时，从句根据情况使用任何时态 如：She wants to know if I have finished my homework. 她想知道我是否已经完成了我的作业。 Do you know when he will be back? 你知道他将会什么时候回来？ ■(2) 当主句是一般过去时，从句应使用过去的某时态 如：He said that she was singing. 他说她正在唱歌。 She wanted to know if I had finished my homework. 她想知道我是否已经完成了作业。 Did you know when he would come back? 你知道他将会什么时候回来？ 【注意】格言和客观真理总是用一般现在时。 如：She told me yesterday (that) the earth travels around the sun.
初中英语语法——三大从句汇总 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）。以下是一些基本的从句知识点 A、定语从句专项讲解与训练 一、定语从句概念 定语从句（attributive clause），顾名思义，就是一个句子作定语从属于主句。定语一般是由形容词充当，所以定语从句又称作形容词从句。另外，定语从句是由关系代词或关系副词引导的，故又称作关系从句。关系词常有3个作用：1，引导定语从句。2，代替先行词。3，在定语从句中担当一个成分。 定语从句一般放在它所修饰的名词或代词之后，这种名词或代词被称作先行词。请看示例：The woman who lives next door is a teacher. 先行词定语从句 在所有的从句中，算定语从句最难掌握，因为汉语里没有定语从句，汉语里只有定语，而且总是放在名词之前来修饰名词。 二、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： 格先行词主格宾格所有格 人who whom whose 物which which whose 、of which 人、物that that — （一）关系代词who, whom和whose的用法 1）who代替人，是主格，在定语从句中作主语。例如： An architect is a person who designs buildings. 建筑师是设计房屋的人。 I will never forget the teacher who taught us chemistry in the first year of my senior middle school. 我将永远不会忘记在高一时教我们化学的那位老师。 Anyone who wants to apply for this job must send us the resume by email first. 想应聘这个职位的任何人都必须先通过电子邮件向我们发送简历。2）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。例如：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？ This is the student whom my father taught ten years ago. 这是我爸爸十年前教的学生。 The girl who I saw is called Mary. 我见到的那个女孩名叫玛丽。（在非正式 英语中，主格who代替了宾格whom，亦可省略） 3）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。例如：The girl student whose father is a senior engineer used to study abroad.
从句 从句按其在主句中的句法功能可分为三类: 即名词性从句、形容词性从句(即定语从句)和副词性从句(即状语从句)。 引导从句的词称作关联句. 一、名词性从句 引导这些名词性从句的关联词包括: 从属连词that, if, whether; 连接代词 who,whoever,whom,whomever,which,whichever,what,whatever,wh ose; 连接副词where, when, why, how。 其中, 从属连词只起连接作用, 在从句中不充当任何句法成分, 而连接代词和连接副词既起连接作用, 在从句中又充当一定的成分. That Owen should have married his cousin is not at all surprising. The fact is that he didn't go to the dinner party. I don't know if he will attend the meeting. Have you heard the news that Mary is going to marry Tom? 你听说玛丽要和汤姆结婚的消息了吗?(that引导同位语从句) [提示]
1. 在含有主语从句的复合句中, 为保持句子平衡, 常用it作形式主语,而将真正的主语从句置于句末. It's well-known that water is indispensable to life.(形式主语) 2. 为保持句子平衡, that引导的宾语从句也常用it代替, 而将真正的宾语从句置于主句句末。这常常出现在主句有形容词或分词作宾语补足语的情况下。 He made it quite clear that he preferred to live here. 3. 从属连词whether和if都作“是否…”解, 但if不可引导主语从句和表语 从句。whether可与or(not)连用, 而if不可以。 I don't know whether (if) she is at home. Whether she comes or not makes no difference. 4. that和what引导名词性从句的区别: that在从句中不充当成分,而what在从句中充当一定的成分, 如主语、表语、宾语等。that可省略, what则不可省。 He always means what he says. She suggested (that) he do it at once. 5. 同位语从句大多由从属连词that引导, 常跟在下列名词后面, 如fact, idea, opinion, news, hope, belief等, that不可省。同位语从句一般用来解释说明这些名词的具体含义和内容。 We are familiar with the idea that all matter consists of atoms. The news that we are invited to the conference is very encouraging.
Simple sentence Compound sentence Complex sentence 从句：名词性从句（主语从句，宾语从句，表语从句，同位语从句） 形容词性从句(定语从句) 副词性从句（状语从句） 英语中六大从句用法总结 在句子中起名词作用的各种从句，统称为名词性从句 1.主语从句subjective clause 一般由what, who, which, why, how, when, which, whether…or…等引导，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 self-evident that… 很明显的是 It goes without saying that… 不用说 It is asserted that．．．有人主张…… It is believed that．．．据信…… It is generally considered that．．．人们普遍认为…… It is hoped that．．．人们希望…… It is reported that．．．据报道…… It is said that．．．据说…… It is supposed that．．．据推测．．．
It is well-known that．．．众所周知…… It must be admitted that．．．必须承认…… It cannot be denie d that… 不可否认…… It must be pointed out that．．．需指出的是…… It was told that．．．据传…… It will be said that．．．有人会说…… It follows that… 由此可见 It is inappropriate that… ……是不合适的 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objective clause 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
高考英语主语从句 定义：用作主语的从句叫主语从句，它是名词性从句之一。主语从句的时态：不受主句的时态影响和限制。引导主语从句的连接词有： 从属连词: that, whether； 连接代词: who (whoever), whom, whose, what (whatever)和which (whichever)； 连接副词: when, where, how和why。 连接词： 1. 从属连词：that，whether 1）that引导主语从句只起引导作用，在主语从句中不充当任何成分，that本身无实际意义，但不能省略。2）whether意为“是否”，放在句首句末皆可。由whether引导的名词从句做主语，表语，介词宾语，同位语时！不可用if代替。 a.That price will go up is certain. b. Whether they would support us was a problem. 他们是否会支持我们还是一个问题。 2. 连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可以和ever构成合成词，和what一样引导从句，ever起到强调作用。此类主语从句不能用形式主语it引导，它们在句子中担任成分，不能省略，语序为陈述语序，既有疑问含义,又起连接作用,同时在从句中充当各种成分。 Which side will win is not clear. Whoever breaks the law will be punished. Whatever he did is right. Who killed the scientist remains a question. 1）What和that引导的主语从句的区别：that 只起引导作用，不充当任何成分，没有意思。What 不仅起引导作用，还要充当一定成分(主语、宾语或表语)，意思是：“什么”。 What we need is money. That he will come is certain. 2）whatever / whoever的用法（~ever=no matter ~---让步状语从句中） whatever / whoever可以引导主语从句,并在句中作主语、宾语、表语等,不含疑问意义。whatever相当于anything that; whoever 相当于anyone who。例如: Whoever(Anyone who) wants to enter into this school must take the exam. Whatever(Anything that) she did was right. 3. 连接副词when，where，how，why等。既有疑问含义,又起连接作用,同时在从句中充当各种成分。How this happened is not clear to anyone. When he will be back depends on the weather. When we’ll start tomorrow will be told soon. Where the test will be given is not yet decided. 4. 主语从句后置：为了避免主语冗长,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 we shall be late is certain. -- It’s certain that we shall be late. 1）用it 作形式主语的结构 A. It + be + 形容词+ that 从句 (obvious, true, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.) 如：It is certain that she will do well in her exam. B. It + be + 名词词组+ that 从句(an honour, a fact, a pity, etc）如： It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact that… …是事实It is common knowledge that… …是常识 It’s a pity that we can’t go. C. It + be + 过去分词+ that 从句(said, reported, thought, expected, decided, announced, etc。）如：It is said that Mr. Green has arrived in Beijing. D. It + 不及物动词或短语+ that 从句( seem，happen, doesn’t matter ,turn out）。如： It happened that I was out that day. It doesn’t matter whether she will come or not. 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
初中英语语法宾语从句讲解 小口诀： 宾语从句三注意，时态语序引导词；主句一般现在时，从句不需受限制； 主句一般过去时，从句须用相应时；陈述转化that引，一般疑问用if/whether, 特殊问句疑问词，引导词后陈述式。 一．基本讲解来源：直接引语变间接引语 概念:在句中担当宾语的从句叫宾语从句。 Eg: He said,“I am good at drawing”. He said he was good at drawing. (动词宾语) 1.引导词 (1) that引导宾语从句时，通常用陈述句充当, that可省略。 Eg: She said,“I want to go there ”She said (that) she wanted to go there. (2) whether 或if 引导的宾语从句,由一般疑问句/选择疑问句充当，陈述语序。 Eg: “Are you interested in geography?” she said. She asked if/whether I was interested in geography. I wonder if /whether she has told the new to Li Lei . I’m not sure whether he will come or not. 注意：一般情况下，whether 和if 可以互用，但有些情况例外 a. 介词短语后只用whether 不用if eg: We are talking about whether we'll go on the panic. b. 引导词与动词不定式或or not 连用时，只用whether. eg:I can?t say whether or not he will come on time c. if当如果讲时,引导的是条件状语从句，表示‘如果’，不能用whether. Eg: If you want to be a good teacher, it will take times. Whether you can succeed depends on how much effort you pay. (3).特殊疑问词引导宾语从句时，不可省略，陈述句语序。 特殊疑问词为：how , when, where, why ,which whose. E.g. …What do you want?? He asked. He asked me what I wanted. I have no idea where he is now. I don?t know how to deal with it. He asked whose handwriting is the best in the class. 2.宾语从句时态 a.主句为一般现在时，从句不受主句的限制 eg: Do you know if/whether he has seen the film? I?m sorry to hear that your father is ill. She says she is going to go to Beijing next week. He tells me that his sister came back yesterday. b.当主句是一般过去时，从句用过去的相应某种时态 She didn?t know why the boy was late again. (过去一般) I didn't know if/whether he had seen the film.（过去完成） I wondered when she was going to America.（过去将来） 注意：当主句是一般过去时，而从句表示的是客观真理，自然现象，科学原理，格言等，从句仍然要用一般现在时。例如： Eg: He said （that the earth moves round the sun. / that light travels much faster than sound.）The teacher told us （seeing is believing.）
高中英语从句大全 1）表语从句 1.定义：用作表语的从句叫做表语从句。 2.构成：关联词+简单句 3.引导表语从句的关联词的种类： （1）从属连词that.如： The trouble is that I have lost his address.麻烦是我把他的地址丢了。 （2）从属连词whether，as，as if.如： He looked just as he had looked ten years before.他看起来还与十年前一样。 The question is whether they will be able to help us.问题是他们是否能帮我们。 注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句，如： All this was over twenty years ago，but it’s as if it was only yesterday. 这都是20多年前的事了，但宛如昨天一样。 能跟表语从句的谓语动词一般为系动词be，seem，look等。如： It looked as if it was going to rain.看起来天要下雨了。 （3）连接代词who，whom，whose，what，which，whoever，whatever，whichever 连接副词where，when，how，why. 如：The problem is who we can get to replace her.问题是我们能找到谁去替换她呢。 The question is how he did it.问题是他是如何做此事的。 That was what she did this morning on reaching the attic.那就是她今晨上了阁楼干的。 解释： 1.连词because可引导表语从句。如： I think it is because you are doing too much.我想这是因为你做得太多。 2.在一些表示“建议、劝说、命令”的名词后面的表语从句中，谓语动词用虚拟语气。should+动词原形表示，should可省略。如： My suggestion is that we （should）start early tomorrow.我的建议是我们明天一早就出发。2）主语从句 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.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.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，what，which，whoever，whatever，whichever 连接副词where，when，how，why.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
高考英语定语从句专项讲解 一、考点分析 在上海高考英语中，定语从句的考点主要体现在语法填空、阅读、翻译和作文等题型里。 二、专题详解 I、概念 1、先行词：被从句所修饰的或，尤其在非限制性定语从句中，先行词不仅仅是一个词还有可能是。 Keys:定语、名词、代词、一整个句子。 2、关系代词 3、关系副词
4、介词+which/whom 它们的常见结构有： (1) 介词+which/whom This is the famous singer about whom we have often talked. (2) 名词+of+ which/whom Please pass me the book the cover of which is blue. (3) 数词+of+ which/whom She’s got three lucky pens, two of which she never uses. (4) 代词+of +which/whom In the basket I find many apples, some of which have gone bad. (5) 最高级+of + which/whom China has thousands of islands, the largest of which is Taiwan. 介词的选择根据介词与定语从句中动词的搭配关系；根据介词与前面的名词先行词的搭配关系；同时考虑与动词和名词的搭配关系。还有关系副词的改写。 5、非限制性定语从句 形式上与主句被隔开，关系上是对主句内容 ,限制性的关系词除和外，其他都能应用于非限制定语从句中，特殊的是，which和as的先行词不仅能是一个词或一个短语，还有可能是。 Keys:逗号、补充说明、that、why、一整个句子。 II、定语从句中的特殊情况。 1、只用that不用which的情况。 (1) 当先行词是anything, everything, nothing (something也可用which), few, little, all, none, the one, some, much, any等不定代词时，或者是由all，every，each，few，little，much，no，some，any等修饰时用that： 1) Please tell me anything that you know about the matter. 2) You can take any seat that is free. 注意：当先行词为all指人或anyone，everyone，No one，anybody，everybody，somebody 时用who
英语中六大从句用法总结 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。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 change the situation. *All this is different from what American young people would say about friendship. *He is certain that watching so much television is not good for children. *This article is well-written except that it is a bit too long. 2）非谓语动词之后的宾语从句 Reading that it was just a difference in custom, the foreigner smiled and said nothing. 这个外国人知道了这只是风俗的不同后，就笑了笑，没说什么。 On being asked whether he had any good food in Germany, he answered ”Terrible”. 一问到他在德国是否吃过什么好菜，他就回答说：“糟糕的很”。 3)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 change his mind. 4)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 didn't think that the money was well spent. 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that,what,when,why,whether,how 等引导外，还可由because,as if(though)等引导。不缺其他成分时，用that引导，且不可省略。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 common type of life in America. The reason why so many people died there is that there were not enough food supplies. It looks as if successful international cultural communication will make the world smaller. 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,when,where,what,why,how等引导。常见的先行名词有fact,idea,belief,news,hope,conclusion,evidence,suggestion,order,problem,report,decision.有时由于谓语较短，将同位语从句位于谓语之后。 She finally made the decision that she would join the fashion show. I had no idea how many books I could borrow at a time. The news came that their team had won the championship.
高考英语宾语从句专题讲解 一、定义和宾从例句分析 宾语从句就是一个句子作动词或介词的宾语。 A 作动词的宾语: I heard the news. I heard that he would come here later on. B 作介词的宾语: He said nothing about the plan. He said nothing about who broke the window last night. 二、带有宾语从句的复合句的构成 带有宾语从句的复合句就是用连接词把一个主句和一个宾语从句连接在一起。 连接词有：that(可省略)，what, who, when, where, why, which, if, whether, how. 1 He suggested (that) we should clean the corridor every day. 宾语 2 He told me (that) he would leave Dalian airport at 8pm. 间接宾语直接宾语 3 He told me where he was going to travel that summer. 间接宾语直接宾语 4 He wanted to know what the manager had said at the meeting. 在例子4中，当主句是过去时态时（一般过去时，过去进行时，过去将来时，过去完成时），从句根据不同情况必须使用过去时态的一种，（大自然的现象和真理除外）。
5 He is wanting to know what I can cook for dinner. 在例子5中，当主语是现在时态时（一般现在时，现在进行时，一般将来时，现在完成时），从句可根据不同情况使用各种时态。 时态： 1.主句用一般现在时，从句可用任意时态。 2.主句用过去时，从句用过去某个时态。 3.主句用过去时，从句是真理时，只用一般现在时。 三、宾语从句的连接词 从属连词 连接宾语从句的从属连词主要有that,if,whether. that引导表示陈述句的宾语从句,而if和whether引导表示“是否”的宾语从句. He told me that he would go to the college the next year I don’t know if there will be a bus any more. Nobody knew whether he could pass the exam. 连接代词 连接代词：who, whom ,whose ,what ,whoever ,whomever ,whoever, whatever, whichever等. 连接代词一般指疑问,但what, whatever除了指疑问外,也可以指陈述. Do you know who has won the game? I don’t know whom you should depend on. The book will show you what the best CEOs know.. Have you determined whichever you should buy,a Motorola or Nokia cell phone?连接副词
初中英语语法状语从句讲解专项练习选择合适的连接词，完成下列句子。 spends a lot of money on books______he is not rich. fell into sleep ______she was listening to the music. David at school today ----No. He is at home ______he has a bad cold. , won't have supper ______my mother comes back. to him slowly ______he may understand you better. 6. ______ she doesn't come on Sunday, I'll go fishing by myself. is four years ______I had left that small village. 8. ______the air moves, it is called wind. will go to the park ______it doesn't rain tomorrow. boys did ______much work. are few new words in the passage ______we can't understand it. ? back ______you come from. reached the station ______the train had left. you have a swimming pool ----No, we don't. At least, not ______big ______yours. me your paper ______you have finished it. is raining hard, ______we have to stay at home. 17. ______you work harder, you'll never pass the final exam. after the children ______I am out. ' village is ______far away ______I can't get there on foot. is ______an interesting book ______I can't stop reading it. 能力提高练习 1 ( ) 1 The meeting didn't start___ everyone was there. A. because B. until C. why D. if ( ) 2 The boy ___ to bed ___ his mother came in. A. went not; until B. didn't go; after C. went; until D. didn't go; until ( ) 3 I won't believe you___ I have seen it with my own eyes. A. before B. until C. after D. when ( ) 4 He ___ home ___ she was satisfied ___ his answer yesterday. A. didn't go; until; with B. wasn't go; after; to C. doesn't go; before; with D. didn't go; until; to ( ) 5 He ___ back until the work ___ done. A. isn't; will be B. isn't; is C. won't be; will be D. won't be; is ( ) 6 They didn't start the work ___ their teacher came back. A. until B. while C. as soon as D. if 2 ( ) 1 Tom will call me as soon as he ___ Shanghai. A. arrives B. will reach C. arrives in D. get to ( ) 2 I'm sure he'll come to see me before he ___ Beijing. A. will leave B. is leaving C. leave D. leaves ( ) 3 I will tell him the news as soon as he___ back. A. come B. comes C. will come D. came 3 ( ) 1 Tom has got a watch. He ___ it for two years. It _______ by his father. A. has bought; was bought B. has got; is bought , C. was bought; has bought . D. has had; was bought "' ( ) 2 When he got to the station, the train ___. A. left B. had left C. leaves D. has left