英语语法句型之从句
英语语法高中从句语法
英语语法高中从句语法高中的英语语法是比较基础的，我们来讲一讲它的一些从句类的吧。
下面是店铺给大家整理的高中英语从句语法，供大家参阅!高中英语从句语法：同位语从句1、关联词不能省略2、从句用陈述语序从句的名词后接同位语fact, idea, word，promise, saying，problem, news常见引导词that, whether, where, how, etc.The facts that he succeeded in the experiment pleased us.An idea came to her that she might do that in another way.Scientists have argued over the problem whether there is life on other planets.高中英语从句语法：表语从句1、关联词不能省略2、从句用陈述语序常见引导词what, when, where, why, whether, how, that, because, which, What surprised me most was that he spoke English so well.The question is how what you’ve said can be put into practice.The reason (why ) he didn’t come is that he was ill.It (This , That) is because iron contains more carbon than steel.高中英语从句语法：名词从句概述一.定义: 在句中的作用相当于一个名词的从句叫做名词性从句二.分类: 名词性从句包括四类, 分别是: 主语从句, 宾语从句, 表语从句, 同位语从句三.引导词: 名词从句的引导词包括连词that / if / whether, 连接代词who / whom / whose / what / which, 连接副词when / where / how / why, 另外还有: whatever, whichever, whoever等主语从句一.定义: 在句中充当主语的从句就是主语从句二.示例:a. That he looked at me in that strange way puzzled me.b. Whether we can control the floods is still uncertain.c. What he wanted to see was an end to all the armies of the world.d. When the broadcast station will be ready is unknown.e. Who made the long distance call to him is not important.f. Whether we’ll go depends on the weather.三.应注意的问题:1.以that引导主语从句时, 常用it作形式主语, 而把真正主语后移, 如在以下句型中就是如此: It is + adj / n + that...; It is said / reported / hoped that...a. It is certain that fuels like coal and oil cause a lot of pollution.b. It was said that only three people in the world could understand it at that time.2.whether引导主语从句时, 常置于句首(此时whether不能用if 代替), 也有后移的用法 (此时whether可以用if代替)a. Whether they will come is not yet known.b. It is not yet known whether they will go there.3.连接代词who, what, which和连接副词when, where, how, why引导主语从句时, 一般不后移a. What I told you last night was really true.b. Which team will win the game is not yet known.c. How they went to the USA is still a puzzle.宾语从句一.定义: 在句中充当宾语的从句就是宾语从句. 谓语动词, 非谓语动词, 介词都可以带有宾语从句二.示例:1.谓语动词的宾语从句:a. They knew that the habit may kill them.b. She asked whether / if there were any chemist’s shops in this street.c. The teacher told them who first invented the television set.d. I want to know whose notebook is left on the table in the reading room.e. Can you tell me where the Great Pyramid is ?2.非谓语动词的宾语从句:a. Having known what he had done in school, his father was very angry.3.介词的宾语从句:a. They talked half an hour about what happened in the school.b. He is pleased with what we did yesterday.c. Leifeng always thought of how he can do more for the people.三.应注意的问题:1.句中有宾语从句且有宾补时, 通常用it作形式宾语, 而把宾语从句移到宾补后a. We think it wrong that he didn’t hel p Tom.b. I feel it possible that you will finish the work in a day.2.that从句一般不作介词的宾语, 但except等少数表示“除外”的介词除外a. I know nothing about him except that he lives next door.3.关于主句和宾语从句的时态呼应:①.如果主句是过去时, 宾语从句应是“过去”范畴的某时态a. He said he would fly to Egypt next day.b. He remembered that he had left her umbrella in the library.②.如果宾语从句表示的是客观真理或普遍现象, 可以保持“现在”范畴时态, 而不与主句时态呼应a. The teacher told us that light travels faster than sound.③.如果主句是一般现在时或一般将来时, 宾语从句根据情况选用所需要的时态4.关于宾语从句的“否定转移”: 主句的谓语动词为这些词( think, believe, expect, imagine, suppose, guess等)时, 宾语从句的否定转移到主句中去a. I don’t think he will come.b. I don’t think there are living things on the moon.表语从句一.定义: 在句中充当表语的从句就是表语从句二.示例:a. My idea is that we should help mother do house work every day.b. The question is whether we can catch the early bus.c. Nicotine! That’s what the smokers need.d. Ten years of hard work! That’s why I now look so old.同位语从句一.定义: 在一个名词或代词(如: news, fact, idea, hope, promise, problem, possibility等)后面, 对其作进一步的解释、说明的从句称为同位语从句二.示例:a. I don’t know the fact that the fireman was killed in the fire.b. I have no idea when Jack will be back.c. He can’t answer the question how he got the money.d. There is no doubt that she is fit for the job.e. The news that our team has won the game is very exciting.f. I didn’t tell mother the fact that I met with an accident on my way home.常见问题一.that引导名词从句与定语从句的区别:1.引导名词从句的that本身无词义, 只起引导作用, 在从句中并不充当任何句子成分; 而引导定语从句的that是关系代词, 有词义(指代先行词), 除了起引导作用之外, 还在从句中充当句子成分2.引导宾语从句的that可省略, 引导其他名词从句的that一般不能省略; 而引导定语从句的that如果在定语从句中充当宾语, 也可以省略a. I know that smoking does harm to people’s health. (宾语从句)b. The text tells me a fact that I have already known. (定语从句)c. The news that he had passed the examination made her parents very happy.(同位语从句)d. The news that he told me yesterday made me surprised.(定语从句)二.which引导名词从句与定语从句的区别:which引导名词从句时, 其含义是“哪一个, 哪一些”; which引导定语从句时, 指代先行词, 其含义就是先行词的意思a. There are so many beautiful caps in the shop. I really don’t know which one I should choose.(宾语从句)b. I will never forget the days which we spent in the countryside. (定语从句)三.that / what引导名词从句的区别:引导名词从句时, that本身无词义, 只起引导作用, 在从句中也不充当任何句子成分; what有词义, what引导的名词从句的含义是“…的事 / 物 (任何抽象的或具体的物) ”, what在从句中也充当一个成分a. They knew that the habit may kill them.b. What he wanted to see (“他想看到的事”)was an end to all the armies of the world.c. Nicotine! That’s what the smokers need.(“抽烟者所需要的东西”)四.引导名词从句时只用whether, 不用if的情况:1.引导主语从句时:a. Whether the 2000 Olympic Games will be held in Beijing is not known yet.2.引导表语从句时:a. The problem is whether we need it.3.引导介词后的宾语从句时:a. He was worried about whether he passed the exam.4.与or not连用时:a. It doesn’t matter whether she will come or not.5.置于不定式之前时:a. I don’t know whether to go.6.引导同位语从句时:a. The problem whether we’ll build another school hasn’t been settled.五.名词从句的语序问题: 名词从句中都要使用陈述语序, 参看前文例句2.引导表语从句时:a. The problem is whether we need it.3.引导介词后的宾语从句时:a. He was worried about whether he passed the exam.4.与or not连用时:a. It doesn’t matter whether she will come or not.5.置于不定式之前时:a. I don’t know whether to go.6.引导同位语从句时:a. The problem whether we’ll build another school hasn’t been settled高中英语从句语法：状语从句一.定义: 在句中作状语的从句就叫做状语从句二.分类: 状语从句包括以下八类1.时间状语从句: 由when, while, as, before, after, since, till / until, as soon as等引导a. I shall tell him the good news when he comes.2.原因状语从句: 由because, as, since, for等引导a. He didn’t hear me because he was listening to the radio.b. Since you are free today, you had better show me how to use the computer.3.地点状语从句: 由where等引导a. Please put the book where it was after you finish reading it.4.条件状语从句: 由if, unless等引导a. I will come to see you if I have time on Sunday.5.比较或方式状语从句: 由than, as, as if, as...as...等引导a. I know you do better than he does.b. The old worker runs very fast as if he were a young man.6.目的状语从句: 由so that, in order that等引导a. They set out early so that they could arrive at the station in good time.7.结果状语从句: 由so, so that, so / such...that...等引导a. They set out early so that they arrived at the station in good time.b. He finished his work so well that the boss praised him inpublic.8.让步状语从句: 由though / although, even if, whatever, whoever, whenever, no matter what / who等引导a. He is in very good health though he is old.b. They didn’t stop working even if it began to rain hard.三.应注意的问题:1.时间和条件状语从句中常用一般时代替将来时a. I will go and see a film if I have time tomorrow.b. I will tell the about it as soon as he comes back.c. He said he would go out for a walk when he finished his work.2.状语从句中可有省略: 在一个含有状语从句的复合句中, 如果主句和状语从句的主语相同, 或状语从句的主语是it, 并且状语从句的谓语含有be动词时, 可以将状语从句的主语和be一起省略掉a. As (she was ) a child, she began to learn English.b. If ( he was ) alive, he must be at least ninety years old.c. Although ( he was ) told to stop, he kept on working.d. If ( it is) necessary, ring me up.e. He didn’t sa y a single word until ( he was ) asked.3.as和than引导的比较状语从句中, 从句中和主句中相同的部分往往省略, 从句中只剩下比较对象a. He is a head taller than I ( am tall ).than之后的人称代词是主格或宾格时, 有时意思不同, 如:a. She likes the dog more than me.=She likes the dog more than she likes me.她喜欢狗比喜欢我更多b. She likes the dog more than I.=She likes the dog more than I like the god. 她比我更喜欢狗4.含有no sooner…than…和hardly / barely / scarcely …when…的句子相当于含有as soon as…引导的时间状语的句子. no sooner或hardly放在句首时, 主谓要部分倒装a. He had no sooner seen the policeman than he ran away. =No sooner had he seen the policeman than he ran away. =He ran away as soon as he saw the policemen.b. He had hardly sat down when the telephone rang. =Hardly had he sat down when the telephone rang. =The telephone rang as soon as he sat down.5.immediately, directly, instantly等词也可以作为连词引导时间状语从句, 相当于as soon as引导的时间状语a. I went to see him immediately I heard from him. =I went to see him as soon as I heard from him.6.the moment, the minute, the second引导时间状语从句, 相当于as soon as引导的时间状语a. He let out a cry the moment he saw the snake.=He let outa cry as soon as he saw the snake.7.each time, every time, any time, last time, next time, first time可以引导时间状语从句a. They shake hands with each other each time they meet.8.since引导的时间状语从句中, 若谓语动词是延续性动词或状态动词, 则其过去时表示动作的完成或状态的结束a. It is five years since he lived here. 他不住这里己有五年了a. They shake hands with each other each time they meet.8.since引导的时间状语从句中, 若谓语动词是延续性动词或状态动词, 则其过去时表示动作的完成或状态的结束a. It is five years since he lived here. 他不住这里己有五年了。
英语语法—从句—宾语从句用法
英语语法—从句—宾语从句用法英语语法—从句—宾语从句用法英语语法—从句—宾语从句1.在句子中起宾语作用的从句叫做宾语从句。
宾语从句的引导词和主语从句的引导词相同。
宾语从句可以作及物动词的宾语，作短语动词的宾语，介词的宾语。
2.宾语从句：短语动词Please go and find out when the train will arrive. 请去弄清楚火车什么时候到。
His teacher pointed out that Tom hadn't studied hard enough.老师指出汤姆学习不够努力。
That depends on how you do it. 那得看你怎么做的。
3.宾语从句：及物动词Everybody knows that money doesn't grow on trees. 谁都知道钱不是长在树上。
Have you decided where you will go for a holiday? 你有没有决定到什么地方去度假？4.宾语从句：介词的宾语I am curious as to what they are going to do next.我对他们下一步打算做什么很感兴趣。
The twin sisters differ only in that one is a bit fatter than the other one.这对双胞胎姐妹的区别，仅仅在于其中一个比另一个稍胖一点。
I am interested in what she is doing. 我对她做的事感兴趣。
5.宾语从句：否定的转移有些表示思想和感情的动词之后的宾语从句中的否定式可以注意到这些动词之前。
I don't suppose you're used to this diet. = I suppose youaren't used to this diet.我想你不习惯这种饮食。
2023届高考英语语法名词性从句精讲之四大从句用法大全讲义
2023年高中英语语法名词性从句精讲之：四大从句用法大全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，which whatever，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、连接代词或连接副词以及关系代词型what引导：如：That he is still alive is a wonder. 他还活着，真是奇迹。
When we arrive doesn't matter. 什么时候到没有关系。
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。
Whether they would support us was a problem. 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引导的主语从句，通常用形式主语代主语从句：如：It's a pity that he didn't come. 很遗憾他没来。
(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：如：Whether they would support us was a problem. 他们是否会支持我们还是一个问题。
It was a problem whether they would support us. 他们是否会支持我们还是一个问题。
(3)对关系代词型what引导的主语从句，通常不用形式主语，总是主语从句放在句首：如：What we need is money. 我们需要的是钱。
英语语法之定语从句
英语语法之定语从句一、定语从句定语从句(Attributi ve 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。
二、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：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), 例如：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。
大学英语语法应用教程-从句(Clause)
从句(Clause)
If two numbers are to be added, it does not matter in which order they are added. 若要把两个数加起来，那么按哪种顺序相加是没有关系的。(需要注意的是，连接代词which并没有位于主语从句句首， 因为它在从句中作介词in的介词宾语和order的定语。而且，不要把由which引导的主语从句误认为是介词宾语从句。) It follows from Maxwell’s hypothesis that whenever there netic field is produced. 由麦克斯韦假设可知，每当电场发生变化时就产生磁场。 (it follows that … 意为“由此得知……；因此”。) It happened that she was out when he called.( = She happened to be out when … ) 他打电话时，她恰巧不在家。(It happens that可译成“碰巧，恰巧；发生”。)
从句(Clause)
3) 表语从句 主要位于系动词be之后的表语从句最为常见，当然，也可用seem, sound等。例如： The present conception of the general structure of the atom is that it consists of a kind of solar system. 现在对 原子的一般结构的看法是：它是由一种太阳系构成的。 All indications are that the need for skilled people in the field of electronics will grow in this new decade. 所有 的迹象表明，在这新的十年中对电子学领域熟练人员的需求量将会增长。 That is how a computer works. 这就是计算机的工作原理。 (本句中的that应译为“这”；how从句一般可译成“……的原理，……是如何……”) Predictions are that electronics will continue to grow at a rapid rate for some time to come. 预测表明，在未来 一段时期内电子学将会继续高速发展。 (That is why … 要译成“这就是……的理由；这就是为什么……；因此……”。) My plan is that we will finish the project by the end of the year. 我的计划是我们年底结束这个项目。 The conclusion of the discussion is that the proposal cannot be accepted. 讨论的结果是这个提议不能被接受。 在个别情况下，状语从句也可充当表语从句(特别是句型this is because … )。如： This is because you has been absent all the term. 这是因为你整个一学期缺勤的缘故。
初中英语语法-英语从句总结
初中英语语法总结（从句）英语从句三大类型按一般说法，可分为三大类14种从句。
一,名词性从句1主语从句Whether it’s right or not remains to be seen。
2宾语从句I wonder whether it's right or not.3同位语从句This is a question whether it's right or not. 4表语从句The question is whether it's right or not。
二，定语从句1限定性定语从句She is the student who can speak English well。
2非限定性定语从句She is the student, who can speak English well。
三,状语从句1时间状语从句The fact will come out when he comes here。
2地点状语从句You can go wherever you like。
3原因状语从句Pay more attention to your lessons because you are astudent。
4方式状语从句He walks as if he were a king.5目的状语从句She went to Japan so that she could learn Japanese well. 6结果状语从句She went to Japan so that she learned Japanese well.7条件状语从句I will understand it if he tells me.8让步状语从句He knows a lot though he is little.1．定语从句There are some old books in the box.The boy dressed in blue is from America。
初中英语语法——三大从句汇总
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的语法知识点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。
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 whichwhoseof which人、物 that that —(一）关系代词who， whom和 whose的用法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。
[英语学习]语法之从句
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二、定语从句：由关系代词或关系副词 that/which/who/when/where/whose等引导 的作定语（修饰名词）的从句。类似汉语中 的“的”。 首先认识一下定语从句： 1. He told me a story that is interesting. 2. The movie which he likes most is Titanic. 3. The boss fired the man who is too lazy. 4. I miss the time when we were young. 5. He went to Jinan where he grew up. 6. He married a woman whose name is Rose.
常考题：例1. Is this museum ___ you visited a few days ago? A. where B. that C. on which D. the one 例2. Is this the museum ____ the exhibition was held. A. where B. that C. on which D. the one 例1变为肯定句： This museum is ___ you visited a few days ago. 例2变为肯定句： This is the museum ___ the exhibition was held.
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）。例如： 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可代替物。 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）
英语语法 主语从句5大用法以及句型知识点归纳梳理
英语语法主语从句5大用法以及句型知识点归纳梳理NO.1 用法一、主语从句的引导词主语从句通常由连词that和whether、连接代词或连接副词以及关系代词型what引导。
1. that引导That he is still alive is a wonder.他还活着，真是奇迹。
That we shall be late is certain.我们要晚了，这是确定无疑的。
That he should have ignored the working class was natural.他忽视工人阶级是很自然的。
That she is still alive is a consolation.她还活着是使人感到宽慰的。
That she became an artist may have been due to her father’s influence.她成为画家可能是受她父亲的影响。
That you are coming to London is the best news I have heard this long time.你将来伦敦是好久以来我听到的最好消息。
That she was chosen made a tremendous stir in her village.她被挑选上，在她村子里引起很大轰动。
2. whether引导Whether it will do us harm remains to be seen.是否对我们有害还要看一看。
Whether they would support us was a problem.他们是否会支持我们还是一个问题。
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。
Whichever (of you) comes in first will receive a prize.无论(你们)谁先到都可以得奖。
英语语法：定 语 从 句
英语语法：定语从句英语语法：定语从句定语从句是英语常见的用来联系多个句子的句型，作用强大而且简洁易用。
我在这里整理了相关学问，快来学习学习吧!英语语法：定语从句一、关系代词引导的定语从句1、that 指人或物在从句中作主语，宾语或表语which 指物在从句中作主语，宾语或表语(作宾语时可以省略)who 指人在从句中作主语，宾语或表语whom 指人在从句中作宾语whose 指人或物在从句中作定语as 指人或物在从句中作主语，宾语或表语but 指人或物在从句中作主语，宾语或表语留意：指物时，whose+名词=the+名词+of which或of which+the+名词2、as 的用法(1)常用于下列结构：suchas; soas;the sameas; asas留意：the sameas 表示同一类，不同一个the samethat 表示同一个(2)as与which的区分a、位置不同as可放在主句后，主句前或主句中间;which只能放在主句后。
b、as起连接作用，表达说话人的观点、看法，并指出主句内容的依据或出处，意为“正如，正像”。
Which相当于并列句，可以用and this来代替，意为“这一点，这件事”。
留意：as常用于下列结构：as we know/ as is known to all, as we all can see, as has been said before/above,as might be excepted, as is often the case, 一般不能用which代替as。
c、在从句中作主语时，which既可作系动词be的主语也可作实义动词的主语，而as只可作系动词be的主语。
二、只用that不用which的状况1、.先行词为all , much, everything, nothing , something ,anything, nothing, none, the one等不定代词时2、先行词被only, any, few, little, no , all, just , very ,right等修饰时.3、当先行词是最高级或被形容词最高级修饰时。
高中英语语法之从句篇(简单,实用,短期内搞定英语从句)
英语语法之从句一.名词性从句名词性从句相当于名词，一个从句在整个句子中充当名词的作用，它可以作为主句的主语、表语、宾语和同位语。
1. Who will win the match is unknown.2. I want to know what he has told you.3. The fact is that he had won the game.4. The news that we won the game is exciting.(一)宾语从句宾语从句在复合句中做及物动词的宾语，或用作介词和某些表示心理活动的形容词后作宾语，或是用it 作为形式宾语代表宾语从句。
例:1. I think that it will be of no use.2. It depends on whether the boss will agree to you or not.宾语从句的连接词：that,（常用且一般可省略）who, what, whether/if（是否）which, whoever, whatever ，when, where, how, why.(连接词的选择要看从句的具体意思需要)例：1. I know that you are a teacher.2. I wonder if/ whether you are Mr Li.3. Do you know what I will do next?4. I can guess which team will win.5. I don’t know when he will come.6. I don’t know where he has gone.7. They don’t know how they should help me.8. Please give the book to whoever likes it.Attention:①★宾语从句的语序一定是正常的语序，即陈述句的语序，先主语后谓语。
英语语法之定语从句、状语从句、宾语从句;数词句型分类及应用;初中优秀作文
英语语法之定语从句定语是指在句子中用来修饰名词、代词的成分。
例如：I will give my teacher a bunch of beautiful flower.（beautiful是定语）我给我的老师一束漂亮的花。
定语从句是指在一个句子中作定语的句子，定语从句要放在所修饰的词后。
例如：I have met a doctor who is in the No.1 hospital.我认识了一位第一医院的医生。
定语从句的关系词：关系代词：who、which、whom、whose、that关系副词：when、where、why状语从句1.时间状语从句：在一个句子中作时间状语的句子。
时间状语从句的连接词：when（当…...时候），while（当...…时候）as（当...…时候），after（在…...以后），before（在...…以前）as soon as（一...…就......），since（自从...…到现在），till/until（直到…...才......），by the time（到...…的时候）例如：Mozart started writing music when he was four years old.莫扎特四岁时开始创作音乐。
2. 条件状语从句：：在一个句子中作条件状语的句子。
条件状语从句的连接词：if，unless（除非），as long as（只要）例如：If it doesn’t rain tomorrow，we will go hiking.如果明天不下雨，我们将去远足。
注意：在时间和条件状语从句中，一定要符合“主将从现”原则。
如上面例句，条件状语If it doesn’t rain tomorrow用一般现在时，主句we will go hiking用一般将来时。
3. 原因状语从句：在一个句子中作原因状语的句子。
原因状语从句的连接词：because，since，as，now that例如：I didn’t go to school yesterday because I was ill.因为我生病了，所以昨天没去上学。
高中英语语法---从句讲解
从句名词性从句在句子中起名词作用的句子叫名词性从句（Noun Clauses）。
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、介词宾语等，因此根据它在句中不同的语法功能，名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
主语从句作句子主语的从句叫主语从句。
主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，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；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。
例如：What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。
如果what-分句本身明显表示复数意义，比如what分句的动词和补语都是复数，那么主句动词也可用复数。
如：What I say and think are none of your business.(我说的和我想的都与你无关。
)注意：当what引导的名词性分句作主语时，主谓一致问题极为复杂。
著名学者周海中教授在论文《关于what-分句作主语的主谓一致问题》中就这一问题做了深入研究，并给出了10种的主谓一致关系。
这些一致关系值得英语学习者和使用者特别注意。
有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。
主语从句后的谓语动词一般用单数形式。
常用句型如下：⑴It + be + 名词+ that从句⑵It + be + 形容词+ that从句⑶It + be + 动词的过去分词+ that从句⑷It +不及物动词+ that 从句另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“（should) +do”，常用的句型有：It is necessary (important, natural, strange, etc.) that …It is suggested (requested, proposed, desired, etc.) that…宾语从句名词句用作宾语的从句叫宾语从句。
高中英语语法：状语从句篇
高中英语语法：状语从句篇一、时间状语从句1、when的用法（1）when既可引导一个持续性动作，也可引导一个短暂性动作，可用于表示主句和从句动作同时发生或从句动作先于主句动作，有时还可表示从句动作后于主句，意为“当。
时候”。
（2）when在be about to do......when......，be doing.....when.....，had done。
when。
，be on one’s way。
when。
，be on the point of doing。
when。
等结构中，作“那时突然”讲。
（3）when “既然、鉴于；尽管，虽然（位于主句之后）；如果”2、while的用法（1）表示“当。
时候”，引导的动作必须是延续性的。
（2）用作并列连词，表示相对关系“然而”。
（3）引导让步状语从句，相当于although,意为“虽然”，位于主句前。
（4）引导条件状语从句，相当于as/so long as，意为“只要”。
3、as 的用法（1）表示“当。
时候”，强调同时发生，不指先后。
（2）说明两种正在发展或变化的情况，表示“随着”，表示时间的推移。
（4）强调两个动作紧接着发生。
（5）表示“虽然，尽管”。
（6）其他含义“正如，正像”，“作为”，“由于，因为”。
4、before的用法（1）一般意为“在。
之前”“。
才”，“。
就”“还没有。
”“免得”“不知不觉”“宁可，宁愿”，“否则，要不然”。
（2）It + will be/was + 时间段+before+一般现在时/一般过去时。
在肯定句中，意为“多长时间之后才”；在否定句中，意为“用不了多长时间就”。
5、until和till（1）与肯定句连用，必须是延续性动词。
（2）与否定句连用，必须是非延续性动词，表示“直到。
才，在。
之前不。
”。
注意：not until可用于强调句和倒装句强调句：It is/was not until…that…倒装句：not until 放句首时，主句要部分倒装。
英语三大从句
复合句【语法要点】复合句是由一个主句加一个或几个从句所构成的句子。
从句只用作句子的一个成分，不能独立。
根据从句在句子中的作用，可分为名词性从句、定语从句和状语从句三类。
（一）名词性从句名词性从句包括主语从句、表语从句、宾语从句、同位语从句。
其关联词有连接词that、if、whether；疑问代词who、what、which和疑问副词when、where、how、why等。
1.名词性从句句法结构：2.名词性从句的其它用法：1）if不能引导表语从句。
连接代词who、what、whose、which不能引导同位语从句。
2）有时as、as if/though、because也可以引导表语从句，能跟表语从句的谓语动词一般为系动词be、seem、look等。
例如：Things are not always as they seem to be.事情并不总是像表面上看来的那样。
It looks as if it were going to rain. It is because you eat too much.3）介词宾语不可以用which来引导，而要用what来引导。
例如：We can learn what we did not know. He will talk to us about what he saw in the U.S.4）连词that引导的名词性从句除能用在except、but、in后之外很少作介词的宾语，。
其它一些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。
例如：He is a good student except that he is careless.You may depend on it that they will support you.5）若主句谓语动词是及物动词make、find、think、see、hear等，则把宾语从句置于宾语补足语之后，用it作形式宾语。
高中英语语法之四种名词性从句及句型
四种名词性从句(宾语从句、主语从句、同位语从句、表语从句)讲解与练习◆学习宾语从句学习宾语从句的连词、语序、时态和各种变化及特殊用法(直接引证变间接引语也在宾语从句的基础上还要进行人称、状语、少数动词和句型的变化)是为学习其它三种名词性从句(主从、表从、同位从)做铺垫，连词、语序、时态基本相同，只是后三种考点相对宾.语从句少的多，主要是对连词的应用进行考查。
所以学好宾语从句是必要的。
宾语从句三注意三特殊一注意:注意引导词(连词)由陈述句转化而来的宾语从句，引导词为that，that 在口语或非正式文体中可省略;由一般疑问句转化而来的宾语从句，引导词为if或whether;由特殊疑问句转化而来的宾语从句，引导词为句子本身的特殊疑问词，即what, when，where 等。
Eg：Tom says(that)he will fly to Beijing tomorrow.汤姆说他明天将要坐飞机去北京二注意:注意从句语序.宾语从句的语序应该为陈述句语序即“主语+谓语+宾语+其他”。
也就是说将疑问句转化成宾语从句时，一定要将疑问句语序转变成陈述句语序。
Can you tell me what he is doing能告诉我他正在做什么吗?<特别提醒>当疑问句在宾语从句中做主语时，语序不变。
Eg：Do you know what makes him so angry?你知道什么事使他如此生气吗？<特别提醒>如果宾语从句表示的是客观真理或是科学事实，其谓语动词仍用一般现在.时态。
Eg：Our teacher told us that the sun is much bigger than the moon.老师告诉我们说太阳比月球大得多。
◆主语从句(与宾词从句连词、语序、时态相同。
只是不能用if, that 不可省;)(一)、主语从句是一个句子，在句子中作主语成分。
(二)，主语从句的特点1.与宾语从句使用同样的连接词，只是if不能用;1)、陈述句用that。
英语语法句子主语从句
英语语法句子主语从句在句子中起名词作用的各种从句，通称为名词从句。
根据它们在句子中的作用，这类从句分别称为主语从句、表语从句、同位语从句。
主语从句可置句首，也可用it 作形式主语，而将从句置句末，如何学好英语?小编在这里整理了相关资料，快来学习学习吧!英语语法句子主语从句一、主语从句的概念与类型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.例如:That she was chosen made us very happy.她当选了使我们很高兴.What caused the accident is a completemystery.是什么导致了这次事故还完全是一个谜.Whether she will come or not is still a question.她是否来还是一个问题.Which team will win the match is stillunknown.哪个队会赢得这场比赛还不知道.Whoever comes to the party will receive apresent.参加聚会的每一个人都将收到一份礼物.When they will start has not been decidedyet.他们何时出发还没决定.注意:上述例句中的主语从句都是放在句首,但有时为了使句子结构平衡,避免"头重脚轻",常用it作形式主语,而把从句放在后面.例如:It is a pity that she has made such amistake.她犯了这样一个错误,真是遗憾.It depends on the climate whether they aregoing shoppingtoday.他们是否今天去购物还得看天气情况.这样就构成了下面一些常用句型: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 ofbuildings 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 beput off.有人建议会议延期召开.It's reported that three people were killedin 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 aninseparable part of China.众所周知,台湾是中国不可分割的一部分.巩固练习1. Does_______ matter if he can't finish the job on time?A. thisB. thatC. heD. it2. It worriedher a bit _______ her hair was turning grey.A. whichB. thatC. ifD. for3. _______ isa fact that English is being accepted as an international language.A. ThereB.ThisC. ThatD. It二、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 wehave.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 serioussituation 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 usgeography is true.一位新老师将来教我们地理,这是真的.巩固练习4. _______what they told me really true?A. HasB. IsC. DoesD. Have5. It matterslittle _______ a man dies, but _______ matters much is _______ he lives.A. how; what;howB. how; it; howC. why; it; whyD. that; what; that6. _______ shecouldn't understand was _______ fewer and fewer students showed interest in herlessons.A. What; whyB. That; whatC. What; becauseD. Why; that7. It ispretty well understood _______ controls the flow of carbon dioxide in and outthe atmosphere today.A. thatB. whenC. whatD. how8. _______ fashion differs from country tocountry may reflect the cultural differences from one aspect.A. WhatB. ThatC. ThisD. Which9. -What made her parents so angry? - _______ she had failed in the examination. A. As B. Because C. Since D. That2)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 geeseremains 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 orgeese.但我们不能说If we shall raiseducks or geese remains to be decided.巩固练习10. _______we'll go camping tomorrow depends on the weather.A. IfB.WhetherC. ThatD. Where3)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.巩固练习11. -Do youremember _______ he came? -Yes, I do. He came by car.A. howB. whenC. thatD. if12. It was amatter of _______ would take the position.A. whoB.whoseC. whomD. whomever13. -I droveto Zhuhai for the air show last week. -Is that _______ you had a few days off? A. why B. when C. what D. where14. I readabout it in some book or other, does it matter _______ it was?A. whereB.whatC. howD. which三、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 besettled at once.这个问题必须马上解决.It's strange that he should have gone awaywithout telling us.他竟然没向我们说一声就走了,真是奇怪.巩固练习15. It isnecessary that a college student _______ at least a foreign language.A. mastersB.should masterC. masteredD. will master四、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 wonfirst 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.第一句话中的It是形式主语,that引导的是主语从句.句中的It is和that无法删除,一旦删除句子就不成立.第二句是强调句型,其中的It is和that可以去掉,因为没有It is和that句子仍然很通顺.主语从句<例句>It's certain that prices will go up.物价肯定要上涨的。
初中英语句型语法精讲之定语从句分析
初中英语句型语法精讲之定语从句分析什么是限制性定语从句?限制性定语从句用于限定或说明其所修饰的词的范围或性质等。
从句与先行词关系密切，如果省略的话则会造成主句意义不完整。
先行词在定语从句中充当某个语法成份(如充当主语、宾语，定语或状语等)。
非限制性定语从句非限制性定语从句与先行词的关系松散，只起补充说明的作用。
去除非限制性定语从句对主句的意义影响不大。
非限制性定语从句由逗号隔开，在翻译成中文时，常可译成一个并列句。
引导非限制性定语从句的关系代词有 which, who, whom, whose, as; 关系副词有when 和 where。
注意非限制性定语从句不能由关系代词that引导。
1) 由which 引导的非限制性定语从句* Her house, which was built a hundred years ago, stood still in the earthquake. 那座房子在地震中依然耸立，它是一百多年前建造的。
* This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。
* Recently I bought an ancient Chinese vase, the price of which was very reasonable. 我最近买了一个中国古代的花瓶，价格很合理。
[注] which 有时不代表一个名词，而是代表前面整个句子或句子的一部分。
* The sun heats the earth, which makes it possible for plants to grow. 太阳给予大地热能，这样植物才有可能生长。
* He didn't pass the exam，which disappointed me. 他没通过这次考试，令我很失望2) 由 who 引导的非限制性定语从句* Charlie Chaplin, who died in 1977, is considered one of the greatest and funniest actors in the history of the cinema.查理卓别林,卒于1977年，他被认为是电影史上最伟大最搞笑的演员之一。
英语语法大全之定语从句
英语语法大全之定语从句一、限制性和非限制性定语从句1) 当先行词是专有名词或物主代词和指示代词所修饰时，其后的定语从句通常是非限制性的，例如：Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾经是我的老师。
My house, which I bought last year, has got a lovely garden.我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。
2) 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数，例如：He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思，这使我心烦。
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽，这就叫做蒸发。
说明：关系代词that和关系副词why不能引导非限制性定语从句。
3) 定语从句有限制性和非限制性两种。
限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思，它与主句之间通常用逗号分开，例如：This is the house which we bought last month.这是我们上个月买的那幢房子。
（限制性）The house, which we bought last month, is very nice.这幢房子很漂亮，是我们上个月买的。
（非限制性）二、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。