2014高三英语语法知识点定语从句
2014高三英语语法知识点定语从句
常梦网为同学总结归纳了 高三英语语法知识点定语从句。希望对考生在备考中有所帮助，欢迎大家阅读作为参考。
定语从句在句中做定语，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。
一、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 指人，在定语从句中作主语。
The boys who are playing football are from Class One. 正在踢足球的男孩是一班的。
Those who want to go to the museum must be at the school gate at 7 tomorrow morning. 想去博物馆的人必须在明晨7点到大门口集合。
2.whom 指人，在定语从句中做宾语，常可省略。
Mr Liu is the person ( whom ) you talked about on the bus. 刘先生就是你们在公共汽车上谈论的那个人。
Li Ming is just the boy ( whom ) I want to see. 李明正是我想要见的男孩。
注意：关系代词whom 在口语或非正式文体中常可用who 来代替，也可省略。
The man ( whom / who )you met just now is my old friend.
3.Which 指物，在定语从句中做主语或宾语，做宾语时常可省略。
Football is a game which is liked by most boys. 足球是大多数男孩所喜欢的运动。
The factory which makes computers is far away from here. 制造计算机的那家公司离这儿很远。
He likes to read books which are written by foreign writers. 他喜欢外国作家写的书。
The house which is by the lake looks nice. 湖边的那幢房子看上去很漂亮。
This is the pen ( which ) he bought yesterday. 这是他昨天买的钢笔。
4.That 指人时，相当于who 或whom;指物时，相当于which.。在定语从句中作主语或宾语，作宾语时常可省略。
The number of people that / who come to visit this city each year reaches one million. 每年来参观这座城市的人数达一百万。
Where is the man that / whom I saw this morning? 我今天早上看到的那个人在哪儿?
The person that /whom you introduced to me is very kind. 你介绍给我的那个人很友好。
The season that / which comes after spring is summer. 春天以后的季节是夏季。
Yesterday I received a letter that / which came from Australia. 昨天我收到了一封来自澳大利亚的信。
5.Whose 通常指人，也可指物，在定语从句中做定语。
I visited a scientist whose name is known all over the country. 我拜访了一个全国知名的科学家。
He has a friend whose father is a doctor. 他有一个爸爸当医生的朋友。
I once lived in the house whose roof has fallen in. 我曾经住在那幢屋顶已经倒塌了的房子里。
注意：指物时，常用下列结构来代替：
The classroom whose door is broken will soon be repaired.
The classroom the door of which is broken will soon be repaired.
精选高三英语知识点之主谓一致
常梦网为同学总结归纳了高三英语知识点之主谓一致。希望对考生在备考中有所帮助，欢迎大家阅读作为参考。
在英语句子中，主语和谓语动词必修在人称和数上保持一致，这就叫主谓一致。主谓一致大致可归纳为三个原则，即语法一致、意义一致和就近一致原则。
一、语法一致原则：语法上一致就是谓语动词和主语在单、复数形式上保持一致。
1、以单数名词或代词、动词不定式短语、动名词短语或从句作主语时，谓语动词一般用单数形式;主语为复数时，谓语动词用复数形式。如：
His father is working on the farm.
To study English well is not easy.
What he said is very important for us all.
The children were in the classroom two hours ago.
Reading in the sun is bad for your eyes.
注意：由what引导的主语从句，后面的谓语动词多数情况用单数形式，但若表语是复数或what从句是一个带有复数意义的并列结构时，主句的谓语动词用复数形式。如：
What I bought were three English books.
What I say and do is (are) helpful to you.
2、由连接词and或both … and连接起来的合成主语后面，要用复数形式的谓语动词。如：
Lucy and Lily are twins.
She and I are classmates.
The boy and the girl were surprised when they heard the news.
Both she and he are Young Pioneers.
注意：① 若and所连接的两个词是指同一个人或物时，它后面的谓语动词就应用单数形式。如：The writer and artist has come. ② 由and连接的并列单数主语前如果分别有no, each, every more than a (an) , many a (an)修饰时，其谓语动词要用单数形式。如：
Every student and every teacher was in the room.
No boy and no girl likes it.
3、主语为单数名词或代词，尽管后面跟有with, together with, except, but, like, as well as, rather than, more than, no less than, besides, including等引起的短语，谓语动词仍用单数形式;若主语为复数，谓语用复数形式。如：
Mr Green, together with his wife and children, has come to China.
Nobody but Jim and Mike was on the playground.
She, like you and Tom, is very tall.
4、either, neither, each, every 或no +单数名词和由some, any, no, every构成的复合不定代词，都作单数看待。如：
Each of us has a new book.
Everything around us is matter.
注意：① 在口语中当either或neither后跟有"of+复数名词(或代词)"作主语时，其谓语动词也可用复数。如：Neither of the texts is (are) interesting. ② 若none of后面的名词是不可数名词，它的谓语动词就要用单数;若它后面的名词是复数，它的谓语动词用单数或复数都可以。如：None of us has (have) been to America.
5、在定语从句时，关系代词that, who, which等作主语时，其谓语动词的数应与句中先行词的数一致。如：
He is one of my friends who are working hard.
He is the only one of my friends who is working hard.
6、如果集体名词指的是整个集体，它的谓语动词用单数;如果它指集体的成员，其谓语动词就用复数形式。这些词有family, class, crowd, committee, population, audience等。如：
Class Four is on the third floor.
Class Four are unable to agree upon a monitor.
二、“介词+关系代词”引导的定语从句
关系代词在定语从句中作介词宾语时，从句常常由“介词+关系代词”引出。
The school (which / that) he once studied in is very famous.
The school in which he once studied is very famous. 他曾经就读过的学校很出名。
Tomorrow I’ll bring here the magazine for which you asked. 明天我将把你要的杂志带来。
This is the boy with whom I played tennis yesterday. 这是我昨天跟他打台球的男孩。
We’ll go to hear the famous singer about whom we have often talked. 我们将去听那位我们经常谈论的著名歌唱家演唱。
注意：
1. 含有介词的短语动词一般不拆开，介词仍放在短语动词的后面。如：look for, look after, take care of 等。
This is the watch (which/that) I am looking for. (正)
This is the watch for which I am looking . (误)
2. 若介词放在关系代词前，关系代词指人时只可用whom，不可用who, that;关系代词指物时只可用which，不可用that。关系代词是所有格时用whose。
The man with whom you talked just now is my neighbour. (正)
The man with that/who you talked just now is my neighbour. (误)
The plane in which we flew to Canada was really comfortable. (正)
The plane in that we flew to Canada was really comfortable. (误)
3. “介词+关系代词”前还可有some, any, none, all, both, neither, many, most, each, few等代词或者数词。如：
He loves his parents deeply, both of whom are very kind to him. 他深深地爱着他的父母，他们俩待他都很好。
In the basket there are quite many apples, some of which have gone bad. 篮子里有好些苹果，有些已经坏了。
There are forty students in our class in all, most of whom are from big cities. 我们班总共有40个学生，大多数来自大城市。
Up to now, he has written ten stories, three of which are about country life. 迄今为止，他写了10部小说，其中3部是关于农村生活的。
三、关系副词引导的定语从句
1.when 指时间，在定语从句中作时间状语。
I still remember the day when I first came to this school. 我仍然记得我第一次来到这所学校的那一天。
The time when we got together finally arrived. 我们团聚的时刻终于到了。
October 1, 1949 was the day when the People’s Republic of China was founded. 1949年10月1日是中华人民共和国成立的日子。
Do you remember the years when he lived in the countryside with his grandparents. 你还记得在农村和你祖父母一起生活的那些年吗?
2.where 指地点，在定语从句中作地点状语。
Shanghai is the city where I was born. 上海是我出生的城市。
The house where I lived ten years ago has been pulled down. 我十年前住的房子已经被拆掉了。
I visited the farm where a lot of cows were raised . 我参观了那个饲养了许多奶牛的农场。
Is this the place where they fought the enemy? 这是他们当初打敌人的地方吗?
3.why 指原因，在定语从句中作原因状语。
Please tell me the reason why you missed the plane. 请告诉我你误机的原因。
The reason why he was punished is unknown to us. 他受惩罚的原因我们都不知道。
I don’t know the reason why he looks unhappy today. 我不知道他今天为什么看上去不愉快。
注意：关系副词引导的定语从句经常可以用“介词+关系代词”引导的定语从句来表示。如：
From the years when/in which he was going to primary school in the country he had known what he wanted to be when he grew up. 自从他在农村读小学时，他就已经知道长大后要做什么。
Great changes are taking place in the city where/in which they live. 他们生活的城市正发生巨大的变化。
The reason why/for which he refused the invitation is quite clear. 他为什么拒绝接受邀请的原因是十分明了的。
四、限制性和非限制性定语从句
1. 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)
2. 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。
3. 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。
4. 限制性定语从句中只能用that 引导定语从句的情况
1) 当先行词是everything, anything, nothing (something 除外), all, none, few, little, some等代词时，或当先行词受every, any, all, some, no, little, few, much等代词修饰时。如：
Have you taken down everything that Mr. Li said? 李老师讲的你都记下来了吗?
There seems to be nothing that is impossible to him in the world. 对他来说似乎世界上没有什么不可能的事。
2) 当先行词被序数词修饰时。如：
The first place that they visited in London was the Big Ben. 在伦敦他们参观的第一个地方是大本钟。
3) 当先行词被形容词最高级修饰时。如：
This is the best film that I have ever seen. 这是我看过的最好的电影。
4) 当先行词被the very, the only修饰时。如：
This is the very dictionary that I want to buy. 这正是我要买的词典。
After the fire in his house, the old car is the only thing that he owns. 家里发生了火灾过后，那辆旧车成了他的唯一拥有。
注意：当先行词指人时，偶尔也可用关系代词who。如：
Wang Hua is the only person in our school who will attend the meeting. 王华是我校唯一出席会议的人。
5) 当先行词前面有who, which等疑问代词时。如：
Who is the man that is standing by the gate? 站在门口的那个人是谁?
Which is the T-shirt that fits me most? 哪件T恤衫最合我的身?
6) 当先行词为人与动物或人与物时。如：
They talked about the persons and things that they remembered at school 他们谈论着他们所能记起的在校时的人和事。
Look at the man and his donkey that are walking up the street. 瞧瞧那个沿街走来的人和他的毛驴。
五、as, which 非限定性定语从句
由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。例如：
As we know, smoking is harmful to one’ s health. 如我们所知，吸烟有害健康。
The sun heats the earth, which is very important to us. 太阳使地球暖起来，这对我们人类很重要。
as可引导非限制性从句，常带有“正如”的意思。
As we know, smoking is harmful to one’ s health. 如我们所知，吸烟有害健康。(as作know的宾语)
As is known, smoking is harmful to one’ s health. (as作从句的主语，谓语动词know要用被动式。)
六、关系代词与关系副词的选择
用关系代词还是关系副词引导定语从句主要看关系词在定语从句中的作用(即所担当的句子成分)。试比较：
A. I know a place where we can have a picnic. 我知道一个我们可以野炊的地方。
I know a place which / that is famous for its beautiful natural scenery. 我知道一个以自然景色优美而闻名的地方。
B. I'll never forget the days when I worked together with you. 我永远忘不了我们一起工作的日子。
I will never forget the days that / which we spent together. 我永远忘不了我们一起度过的日子。
C. This is the reason why he was dismissed. 这就是他被解雇的原因。
This is the reason that / which he explained to me for his not attending the meeting. 这就是他向我解释的他没有参加会议的原因。
以上就是高三英语语法知识点定语从句，希望能帮助到大家。
高三英语语法知识点：名词性从句
常梦网为同学总结归纳了 高三英语语法知识点：名词性从句。希望对考生在备考中有所帮助，欢迎大家阅读作为参考。
引导名词性从句的连接词：
1. 连词：that(无任何词意)whether, if(均表示“是否”表明从句内容的不确定性)as if, as though(均表示“好像”，“似乎”)以上在从句中均不充当任何成分。
2. 连接代词：what, whatever, who, whoever, whom, whose, whichever, whomever
3. 连接副词：when, where, how, why, how many, how much, how often
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，只可用whether：
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"
Whether he will come is not clear.
一、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。
Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。
It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。
Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行，还没有宣布。
二、宾语从句
名词句用作宾语的从句叫宾语从句。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。
1. 由连接词that引导的宾语从句
由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。例如：
He has told me that he will go to Shanghai tomorrow. 他已经告诉我他明天要去上海。
We must never think (that) we are good in everything while others are good in nothing. 我们决不能认为自己什么都好，别人什么都不好。
注意：在demand，order，suggest，decide，insist，desire，request，command等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“(should)+ 动词原形”。例如：
I insist that she (should) do her work alone. 我坚持要她自己工作。
The commander ordered that troops (should) set off at once. 司令员命令部队马上出发。
2. 用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等关联词引导的宾语从句相当于特殊疑问句，应注意句子语序要用陈述语序。例如：
I want to know what he has told you. 我想知道他告诉了你什么。
She always thinks of how she can work well. 她总是在想怎样能把工作做好。
She will give whoever needs help a warm support. 凡需要帮助的人，她都会给予热情的支持。
三、表语从句
在句中作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样，表语从句位于连系动词后，有时用as if引导。其基本结构为：主语 + 系动词 + that从句。例如：
The fact is that we have lost the game. 事实是我们已经输了这场比赛。
That’s just what I want. 这正是我想要的。
This is where our problem lies. 这就是我们的问题所在。
That is why he didn’t come to the meeting. 那就是他为什么不到会的原因。
It looks as if it is going to rain. 看上去天要下雨了。
需要注意的，当主语是reason时，表语从句要用that引导而不是because。例如：
The reason why he was late was that he missed the train by one minute this morning .
【注意】whether 可引导表语从句，但与之同义的if却通常不用于引导表语从句。
四、同位语从句
同位语从句说明其前面的名词的具体内容。同位语从句通常由that引导，可用于同位语从句的名词有 advice，demand，doubt，fact，hope，idea，information，message，news，order，problem，promise，question，request，suggestion，truth，wish，word 等。例如：
The news that we won the game is exciting. 我们赢得这场比赛的消息令人激动。
I have no idea when he will come back home. 我不知道他什么时候回来。
The thought came to him that Mary had probably fallen ill. 他想到可能玛丽生病了。
以上就是高三英语语法知识点：名词性从句，希望能帮助到大家。