三大从句语法
初中英语语法——三大从句汇总(重点笔记)
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：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 firstyear 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。
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 .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。
例如：We find it necessary that we practise spoken-English every day.6）某些作表语的形容词或过去分词后常接宾语从句，如sure、happy、glad、certain、pleased、afraid、surprised、satisfied等，连词that可省略，有的语法书称之为状语从句。
三大从句语法讲解
三大从句语法讲解从句：在复合句具有主谓部分但不能独立成句的句子。
主句：除掉从句，就是主句在英语中，主要有三大从句：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）三大从句快速判断方法：1.主句不完整，从句不完整→名词性从句（连接代词）2.主句不完整，从句完整→名词性从句（连词、连接副词）3.主句完整，从句不完整→定语从句（关系代词）4.主句完整，从句完整→定语从句（关系副词）、同位语从句、状语从句名词性从句主语从句：（用句子代替名词来做主语）比如汉语中：①你通过我的方法学好了英语【主语】是我的荣幸。
②你要不要学英语【主语】是你自己的事。
③你想要的学习效果【主语】还必须靠你自己实现。
④你什么时候开始学英语【主语】是很重要的一件事。
基本：三类主语从句的连词（1）从属连词引导的主语从句（that / whether / if）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。
That 引导主语从句通常用it 作形式主语。
例如：That you will win the medal seems unlikely.（你要赢得这样比赛看起来不可能。
）That she survived the accident is a miracle.（她能在这场事故中幸存真是个奇迹。
）这个就同我们汉语例子中的①句一样，只不过英语中更加重视句子结构，所以把that放在前头，告诉你这个that后面跟的句子（和里面的主谓宾）不影响主句。
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不能在开头，只能用whether.Whether we will hold a party in the open air tomorrow depends on the weather.（我们明天会不会在户外举办聚会取决于天气。
初中英语语法三大从句总结,仅此一份,建议收藏!
在初中英语中，主要有三大从句，即宾语从句、定语从句、状语从句（包括时间、条件、结果、目的、原因、让步、地点、方式等）。
小编今天跟大家分享的就是这三个从句的主要语法点，赶快看起来吧！宾语从句一、定义在句子中起宾语作用的从句叫做宾语从句。
二、连接词that: I think that you can pass the exam.Whether/if: I don’t know what the word means.“Wh”: I don’t know what the word means.I don’t know where he found the book.只用whether的情况：1. 与or not连用：I don’t know whether it’s raining or not.2. 与动词不定式连用：He doesn’t know whether to accept the invitation.3. 连接词前有介词时：It depends on whether he is coming.三、时态1. 主句是一般现在时态，从句根据实际情况而定(各种时态均可)She wants to know what he has done for the exam.2.主句是一般过去时态，从句用相应的过去的时态。
1）She said that she was a student.2）She said that she would fly to Japan in a week.3）She said that she had finished her homework already.3. 如果宾语从句说的是客观真理、自然现象或事实时，这时宾语从句要用一般现在时态。
The teacher said that the earth goes round the sun.一、定义在复合句中修饰名词、代词的从句叫定语从句。
英语的三大从句语法讲解
英语三大从句在英语中，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）。
定语从句一、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：先行词主格宾格所有格人who whom whose物which which \人或物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。
An architect is a person who designs buildings. 建筑师是设计房屋的人。
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。
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？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。
The girl student whose father is a senior engineer used to study abroad. 其父是一位高级工程师的那个女学生过去在国外留学。
Do you know the name of the hotel whose window we can see here? 我们这儿能看到窗户的那个宾馆叫什么名字，你知道吗？（关系代词whose指代先行词hotel，正式用法应该用of which。
whose window=the window of which，意思是：the window of the hotel。
）（二）关系代词which的用法which代替物，在定语从句作主语或宾语，作宾语时还可省略。
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。
英语三大从句语法讲解
英语三大从句在英语中，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）。
定语从句一、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（一）关系代词who, whom和who代替人，是主格，在定语从句中作主语。
An architect is a person who designs buildings. 建筑师是设计房屋的人。
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。
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？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。
The girl student whose father is a senior engineer used to study abroad. 其父是一位高级工程师的那个女学生过去在国外留学。
Do you know the name of the hotel whose window we can see here? 我们这儿能看到窗户的那个宾馆叫什么名字，你知道吗？（关系代词whose指代先行词hotel，正式用法应该用of which。
whose window=the window of which，意思是：the window of the hotel。
）（二）关系代词which的用法which代替物，在定语从句作主语或宾语，作宾语时还可省略。
I do not like stories which have unhappy endings.我不喜欢有不幸结局的小说。
考研英语语法之三大从句
三大从句一、定语从句定语从句，简言之，就是用来做定语的句子，即用于修饰名词或代词的一个具有完整主谓结构的句子。
这个被修饰的名词或代词因为总是在定语从句的前面，所以我们称之为先行词。
而引导定语从句的连词，叫关系词，分为关系代词和关系副词。
One reason why it is hard to design and teach such courses is that they cut across the insistence by top American universities that liberal-arts education and professional education should be kept separate, taught in different schools.（一）定语从句的先行词先行词是定语从句所修饰的对象。
只有正确找出先行词，才能明白定语从句所修饰的究竟是什么成分，才能正确理解句子前后各部分的逻辑关系，分清句子结构，从而正确理解句子。
1. 一个词（通常是名词，也可以是代词）For a social epidemic to occur, however, each person so affected must then influence his or her own acquaintances, who must in turn influence theirs, and so on; and just how many others pay attention to each of these people has little to do with the initial influential.2. 一个短语During the past generation, the American middle-class family that once could count on hard work and fair play to keep itself financially secure has been transformed by economic risk and new realities.3. 一个从句The Greeks assumed that the structure of language had some connection with the process of thought, which took root in Europe long before people realized how diverse language could be.4. 一个完整的句子As can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of this condition.They are invited to the state banquet, which was a great honor to them.（二）引导定语从句的关系词1.It is about YOU, and how you performed and what you accomplished in those past jobs –especially those accomplishments that are most relevant to the work you want to do next.She had recently left a job and had helped herself to copies of the company’s client data, which she intended to draw upon in starting her own business.At the same time, the American Law Institute – a group of judges, lawyers and academics whose recommendations carry substantial weight – issued new guidelines for tort law stating that companies need not warn customers of obvious dangers or bombard them with a lengthy list of possible ones.dream, a window opens into a world where logic is suspended and dead people speak.Now the tide appears to be turning. As personal injury claims continue as before, some courts are beginning to side with defendants, especially in cases where a warning label probably wouldn’t have changed anything.Pearson has pieced together the work of hundreds of researchers around the world to produce a unique millennium technology calendar that gives the latest dates when we can expect hundreds of key breakthroughs and discoveries to take place.（三）定语从句与先行词的隔离考研英语中有很多复杂的定语从句，它们的先行词并不像常规那样紧靠着关系词，而是在先行词与关系词之间插入了很多成分。
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从句可分为三类:即名词性从句、形容词性从句（即定语从句）和副词性从(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 ，whose 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。
不可省略的连词：1. 介词后的连词2。
引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy。
We heard the news that our team had won。
比较：whether与if 均为"是否"的意思。
但在下列情况下，whether 不能被if 取代:1。
whether 引导主语从句并在句首2。
引导表语从句 3. whether从句作介词宾语4. 从句后有"or not” 例：Whether he will come is not clear。
The fact is that he didn't go to the dinner party。
I don't know if he will attend the meeting。
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。
That—从句作主语通常用it作先行词，而将that—从句置于句末，例如：It is quite clear that the whole project is doomed to failure。
很清楚，整个计划注定要失败。
It’s a pity that you should have to leave.你非走不可真是件憾事.用it作形式主语的that—从句有以下四种不同的搭配关系:A It + be +形容词+ that—从句例:It is necessary that…有必要……It is important that…重要的是……It is obvious that… 很明显……B. It + be + —ed 分词+ that-从句例如：It is believed that…人们相信……It is known to all that…从所周知……It has been decided that… 已决定……C。
It + be +名词+ that—从句例:It is common knowledge that………是常识It is a surprise that… 令人惊奇的是……It is a fact that… 事实是……D. It +不及物动词+ that—分句例：It appears that…似乎……It happens that…碰巧……It occurred to me that… 我突然想起……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.二、形容词性从句引导定语从句的关联词包括：(1)关系代词：that，which, whose, who, whom，as; (2）关系副词:when，where，why.关系代词和关系副词在定语从句中都充当一定的句法成分,关系代词在句中充当动词的宾语时，一般可省去。
关系代词的选用比较复杂，它受下列条件的制约: (1）先行词是指人还是指物(2）关系代词在从句中的句法功能(3）定语从句是限定性的还是非限定性的。
关系代词的选用情况见下表：先行词在从句中的句法功能用于限定性或非限定性定语从句只用于限定性定语从句指人或指物指人指物主语who which that宾语whom which that定语whose whose(of which)I know that he is a man who （that) means what be says.The gentleman whom （that) she met addressed her with courtesy(礼貌).The watch which （that) was lost has been found。
Here is the meterial which （that) you need.You're the only one whose advice he might listen to.关系副词的选用相对来说较简单。
如先行词为表示时间的名词，如time, day等，则用when; 如先行词为表示地点的名词，如place, house，area等,则用where；如先行词为reason，则用why。
例：I'll never forget the mountain village where (in which）I spent my childhood.I don’t know the reason why (for which）he did that.1。
当先行词是all，something，nothing等不定代词时;或先行词前有first，last, only，few，much, some，any, no等修饰时；或先行词前有形容词最高级修时，一般只用that而不用which来引导定语从句。
例：I’ve explained everything （that) I can to you。
This is the most beautiful compus （that）I've ever been to。
2. 定语从句分为限定性定语从句和非限定性定语从句，限定性定语从句与主句关系紧密, 为句中不可缺少的部分，如去掉, 主句意思不完整。
非限定性定语从句与主句关系松散，如去掉, 主句内容仍完整。
在书面语中, 非限定性定语从句一般被逗句隔开。
非限定性定语从句一般不用that引导。
引导非限定性定语从句的关系词不可省略。
His speech, which bored everyone, went on and on.The general’s daughter, whose name is Ann，gave me a sweet smile.3. 先行词也可以是整个句子.这时, 一般用which或as来引导定语从句。
which在从句中可充当主语、宾语等, as在从句中一般只充当主语。
which与as引导此类定语从句的区别在于：which只能置于句中或句末, 而as的位置比较灵活, 可置于句中、句末, 又可置于句首。
Water consists of hydrogen and oxygen，which (as）is known to all。
As had been expected，he finished first in decathlon（十项全能) at that Olympic Games。
4。
关系代词在定语从句中有时也做介词的宾语。
如果介词被置于关系代词前, 一般只用介词+which或介词+whom, 而不用介词+that来此导定语从句。
如果介词被置于从句句末, 则可用that代替which或whom,且that这时可省去.This is the ring on which she spent 1，000 dollars.One of my colleagues whom (that) you are familiar with will come today.区分关系代词与关系副词方法一：用关系代词，还是关系副词完全取决于从句中的谓语动词。
及物动词后面无宾语，就必须要求用关系代词；而不及物动词则要求用关系副词。
例如：This is the mountain village where I stayed last year.I’ll never forget the days when I worked together with you。
方法二：准确判断先行词在定语从句中的成分(主、谓、宾、定、状），也能正确选择出关系代词/关系副词。
例1. Is this museum _D__ you visited a few days age?A。
where B. that C. on which D。
the one 例2. Is this the museum __A__ theexhibition was held .A. where B。
that C. on which D。
the one三、副词性从句在复合句中, 起状语作用的从句称作状语从句。
状语从句分为:时间状语从句、地点状语从句、条件状误从句、原因状语从句、让步状语从句、比较状语从句、目的状语从句、结果状语从句、方式状语从句。
状语从句可放在句首或句末.如状语从句位于主语前,一般用逗号将其与主句隔开。
（一)时间状语从句When you cross a main road，you must be very careful.Until we learn the facts，we can’t do anything about it。