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初中英语定语从句语法知识讲解

初中英语定语从句语法知识讲解
初中英语定语从句语法知识讲解

初中英语定语从句语法知识讲解

(名师精讲必考语法知识点,值得下载)

一、考点解读

我们主要复习如下内容:

1.先行词与关系词

2.限制性定语从句与非限制性定语从句

3.关系代词的用法

4.关系副词的用法

5.定语从句需注意的事项

6.初中阶段学习定语从句的要点

二、专题梳理

(一)什么是定语从句

定语可以由形容词、名词、代词、数词、分词、副词、不定式以及介词短语等来充当,也可以由一个句子来充当。充当定语功能的句子称为定语从句。定语从句在句中的作用相当于形容词,故又称为形容词性从句。

定语从句用来修饰名词、代词或整个主句。

e.g.Tom is a hardworking student w ho always gets first in his class.

汤姆是一个用功的学生,他在班里总是第一名。(修饰名词student。)Football is played over 80 countries, which makes it popular.

80多个国家都在踢足球,因此足球很流行。

(修饰整个主句Football is played over 80 countries。)

(二)先行词与关系词

1.什么是先行词:被定语从句修饰的名词、代词称为先行词。可以这样理解,

之所以称它为先行词,是因为先行词总是出现在定语从句之前,而不同于普通

形容词修饰名词,形容词常位于名词之前。

e.g.Don’t forget t he book that I told you to bring.

别忘了我让你带的书。(the book为先行词。)

2.先行词与关系词的关系:引导定语从句的词被称为关系词。关系词根据其在

定语从句中的功能可分为关系代词和关系副词。关系代词在定语从句中作主语、宾语、表语、定语等,关系副词在定语从句中作状语。

含有定语从句的句子一般分为两层:即主句层(第一层),定语从句层(第二层)。

特别提示:

①关系词一般紧跟在先行词之后引导定语从句。定语从句总在被修饰的先

行词后面。

②在定语从句中,关系代词起着代词和连词的作用,关系副词起着副词和

连词的作用。

③在定语从句中,关系词代替先行词,因此在定语从句中不能再重复作用

相当于先行词的词。

下面的句子是错误的:

This is the right book that you are looking for the book.(应去掉the book。)This is the right book that you are looking for it.(应去掉it。)

关系词的种类

①常见的关系代词

指代对象代指人代指物既可指人也可指物

主格who, that

which, that, as that

宾格whom, that

所有格whose whose

e.g.Our chemistry teacher is a man who/that can make his class lovely and interesting.

我们的化学老师可以使他的课堂生动有趣。

(主格who/ that在定语从句中作主语,代指人 a man。)

Mr. White invited many friends to his party whom/who/that he respected much.

怀特先生邀请了很多他十分尊敬的朋友来参加他的宴会。

(宾格whom/ who/ that在定语从句中作respected的宾格,代指many friends。)

②常见的关系副词

指代对象先行词关系副词及相应介词结构

时间时间先行词:day, year, date, time when, during which

地点

地点先行词:the place, the city,

Beijing where, in which, from

which

原因原因先行词:the reason why, that, for which e.g.Make marks in places where you have questions.

在你有问题的地方做出标记。

(where为关系副词,在定语从句中作地点状语。)

I still remember the time when we first met scores of years ago.

我依然记得几十年前我们第一次见面的情景。

(when为关系副词,在定语从句中作时间状语。)

特点提示:选择关系代词三步骤:

步骤一:首先找出先行词。

e.g.The book that/which you just laid on the top shelf is mine.

你刚才放在高层书架上的书是我的。(the book是先行词,指物。)步骤二:确定先行词在从句中所作的成分。

先行词the book在后面的定语从句中作laid的宾语,因此选择指物的关系代词which/that作宾语。

步骤三:确定关系代词的人称和数。

在此处由先行词the book可知是第三人称单数,如果关系代词作主语,则从句的谓语动词相应用单数。

3.关系代词的用法

常用关系代词有who, whom, whose, that, which, as等。这些关系代词在定语从句中作主语、宾语、表语、定语等。

关系代词主要起三种作用:代替先行词、在定语从句中作成分、连接先行

词与定语从句。

e.g.This is an old computer. I t works much slower.

这是一台旧电脑。它工作起来速度较慢。

(普通代词it代替an old computer。)

This is an old computer w hich/that works much slower.

这是一台工作起来速度较慢的旧电脑。

(关系代词which/ that代替an old computer。)

Those()shall be punished.+Those break the rules.

→Thosewho break the rules shall be punished.

违反制度的人将会受到处罚。

(who是关系代词,在定语从句中代替先行词those,同时作从句的主语,也起连接词的作用,把两个简单句连接起来。)

(1)who/whom的用法

二者都用于指人。who在定语从句中作主语、宾语,whom在定语从句只作宾语。

e.g.In this earthquake, the number of people who lost homes r eached as many as 250 000.

在这次地震中死亡的人数多达250 000。

(who在定语从句中作主语。)

I have many f riends to whom I am going to send postcards.

我有很多需寄贺卡给他们的朋友。

(whom在定语从句作介词to的宾语。)

注意:在现代英语中,定语从句中作宾语的关系代词whom也可用who代替,但who不用于介词后。在非限制性定语从句中,whom不可用who代替。(2)whose的用法:whose一般指人,但有时也指物。在定语从句中作定语。

e.g.You’re the only one w hoseadvice he might listen to.

只有你的建议他可能会听。

(whose在定语从句中作advice的定语。)

I’d like a room whose window looks out over the sea.

我想要一个通过窗户可以俯看大海的房间。

(whose在从句中作window的定语。)

(3)which的用法:which一般指物,在定语从句中作主语、宾语,偶尔作定语。which在指人时往往指婴儿或指人的品质。

e.g.The river which runs through the center of the city brings us lots of pleasure. 穿过市中心的那条河给人们带来很多欢乐。

(which在从句中作主语。)

(4)that的用法

that指人或物,在从句中可作主语或宾语,还可作表语。作宾语或表语时可省略。作介词宾语时,介词不可提到that之前,若提前需要用which或whom 等词代替。

e.g.The picture (that) we are studying was drawn by a fifteen-year-old student.

我们正看的这幅画是一个十五岁的学生画的。

(that在从句中作宾语)

Who is it that won the first prize in the latest National Maths Competition?

谁在最近的国家数学竞赛中获得了第一名?

(that在从句中主语)

注意:第二个句子中由于定语从句太长,主句太短,所以把定语从句放在

了句尾,以保持全句的平衡。

(5)as的用法

先行词有the same, such, as, so等修饰时,关系代词常用as。as在从句中既可指人、物,也可指整个句子。

①置于主句句尾的从句

as引导定语从句时,在从句中常作主语、宾语、表语等,该定语从句可以

是限制性的,也可以是非限制性的。

e.g.Such people as have made great contributions to the world should be greatly respected.

那些对世界做出巨大贡献的人应受到极大的尊重。

(as在定语从句中作主语)

You can take as many as you need.

你可以根据需要尽量拿。

(as作从句中need的宾语)

Shakespeare is a famous writer, as everybody knows.

莎士比亚是著名的作家,这众人皆知。

(as作knows的宾语)

Let’s meet at the same place as we did yesterday.

咱们在昨天见面的同一地方见面吧。

(as在定语从句中作状语)

②置于句首的从句

as引导的这种从句如若置于句首时,多为非限制性定语从句。

e.g.As everybody knows, Shakespeare is a famous writer.

众所周知,莎士比亚是一位著名的作家。

有时,as引导的从句可以放于主语与谓语之间。因此上句可改为:Shakespeare, as everybody knows, is a famous writer.

常用必背:

as引导的定语从句通常有固定的译法。

as we all know大家都知道

as I can remember正如我所记得的

as often happens这经常发生

as we expect正如我们预料的那样

as you see这一点你明白

as has been said before如前所述

as is well known众所周知

as was expected正如预料的那样

as is expected正如预料的那样

as can be seen看得出来

as may be imagined正如可以想象出来的那样

as we all can see正如我们都能看到的那样

(6)关系代词的省略

引导限制性定语从句的关系代词在某些特定的情况下可以省略,但在非限

制性定语从句中,关系代词不可以省略。

在限制性定语从句中,能够省略关系代词的情况主要有:

①当关系代词在从句中作动词的宾语时。

e.g.I have been to t he city twice (that/which) you just visited.

你刚参观完的那座城市,我去过两次。

②关系代词在从句中作表语时。

e.g.After a score of years, Johnson is not the naughty boy (who/that) he used to be. 二十年后,约翰逊不再是当年那个淘气的男孩子了。

③关系代词在从句中作介词的宾语,且介词不在关系代词之前时。

e.g.Generation gap is a problem (which/that) people are interested in.

代沟是人们感兴趣的问题。

4.关系副词的用法

常用的关系副词有where, when, why, that等。这些关系副词在定语从句中

作状语。

(1)where的用法:在定语从句中作地点状语,指代地点。此时常可用in which, on which, at which, to which等结构代替。

e.g.Potato can be grown in p laces where it is too cold to grow rice.

(=Potato can be grown in places in which it is too cold to grow rice.)

有些太冷不能种稻米的地方,可以种马铃薯。

(2)when的用法:在定语从句中作时间状语,往往代指时间。此时常可

用on which, in which, at which, during which等代替。

e.g.I shall never forget the days w hen we worked on the farm.

(=I shall never forget the days on which we worked on the farm.)

我永远也不会忘记我们在农场劳动的那些日子。

(3)why的用法:why在定语从句中作原因状语。可以用for which代替。why不可引导非限制性定语从句,此时可用for which代替。

e.g.I have come around to explain t he reason w hy I was absent from the meeting.

我来是为了向你解释我当时没到会的原因。(why在从句作原因状语。)(4)that的用法

在表明方式、时间或地点的先行词后面,常用that来代替in which,when 或where,that也可省去。that在句中不作任何成分,只起到引导定语从句的作用,修饰的先行词常为the way, the time, the day, the place等,此时也可换为其

他相应的关系副词。

①表示方式时。that(=in which)常省略。此时不能用how引导定语从句,但把the way去掉之后。可直接用how引导方式状语。

e.g.Can you work out a way (that/ in which)we can solve this problem?

你能找出一种我们可以解决这个问题的方法吗?

(that在定语从句中不作成分。)

②表示地点时,that(=where=介词+which)也可省略。

e.g.I have never been to the places(that/ where/ in which)the Indians live.

我从未到过那些印第安人居住的地方。

(that在定语从句中不作成分。)

③表示时间时,that(=when=介词+which)也可省略。

e.g.I still remember the days (that/ when /on which)I helped my father on the farm. 我仍然记得在农场上给我爸爸帮忙的日子。

(that在定语从句不作成分。)

④另外,关系副词that有时还可用来代替关系副词why,表示原因。

e.g.The reason t hat(=why)he lost his life was lack of medical care.

他的死是由于缺乏医疗护理。

特别提示:在下面这个句子中,不能用why,只能用which或that。

(that/ which)you might give.

I don’t want to hear any reason

我不想听你给出的任何理由。

(在这个定语从句中,that/ which作定语从句中谓语动词give的宾语。)(5)关系副词的省略

①在某些表示时间的名词后的关系副词可以省略。如the time, every time, each time, the moment等。

e.g.By the time (when) he was fourteen years old Einstein had learnt advanced mathematics all by himsel

f.

到十四岁时,爱因斯坦已经自学了高等数学。

Do you still remember the day(when)we first met?

你仍然记得我们第一次相遇的那一天吗?

②在某些句子中表示地点的名词后关系副词有时也可以省略。如the place 等。

where) he lived when he was in Paris.

e.g.That’s the place (

这就是他在巴黎时所住的地方。

This is the place (where) we met years ago.

这就是多年前我们见面的地方。

③先行词the reason后面的关系副词可以省略。

e.g.That’s the reason (

why) I asked you to come.

这就是我叫你来的原因。

The reason (w hy) he did that is quite clear.

他那样做的理由是非常清楚的。

④当先行词是way时,关系副词常常省略。

e.g.I appreciate the way (that) you teach us.

我非常喜欢你教我们的方式。

(三)定语从句中需注意的事项

1.主谓一致问题

这是指关系代词在定语从句中作主语时,定语从句中谓语动词的单复数形

式与先行词一致的问题。

①取决于先行词,先行词是单数时,从句的谓语动词用单数;先行词是复

数时,从句的谓语动词用复数。

e.g.Mr. Smith, who is now downstairs, is asking to see you.

史密斯先生要见你,他现在正在楼下。

(定语从句的谓语动词is根据Mr. Smith而定。)

The Smiths, who are now downstairs, are asking to see you.

史密斯夫妇要见你,他们正在楼下。

(定语从句的谓语动词are根据the Smiths而定。)

②“one of+复数名词”作主语,谓语动词用复数形式;“the

(only, very, right)one of+复数名词”作主语时。谓语动词用单数形式。

e.g.Jeff is one of the students who were awarded.

杰夫是当时获奖的学生之一。

(本句的先行词是the students,即所修饰的中心词为the students,因此谓语动词应根据the students而定。)

Jeff is the only oneof the students who was awarded.

杰夫是唯一一个获奖的学生。

(本句的中心词移到了the only one,因此定语从句的谓语动词需根据the only one而定。)

2.what,how不可引导定语从句

①what本身是复合关系代词,等同于“先行词+关系代词(which/that)”。因此不能用what引导定语从句。

e.g.Time is what we demand most.

(=Time is all (that) we demand most.)

我们所需要的就是时间。

Tell me what is happening.

(=Tell me something that is happening.)

告诉我正在发生什么事。

what she used to be.

She isn’t

the one (that) she used to be.)

(=She isn’t

她不是过去的她了。

②how为复合关系副词。本身等同于the way in which,因此,不能用how 引导定语从句。

e.g.I don’t like how you behave.

(=I don’t like the way (that/ in which) you behave.

我不喜欢你行事的方法。

This is how I worked out this problem.

(=This is the way (that/ in which) I worked out this problem.)

这就是我解出这道题的方法。

3.关系代词that和which的用法辨析

that和which在定语从句中都可作主语或宾语,指物。作宾语时,均可省略。通常情况下,二者可互换使用。但有时却不宜随便互换。

①宜用that的情况

1)当先行词是all, much, little, few, something, anything, everything. none, nothing 等不定代词或被不定代词修饰时。

e.g.There is not much that ought to be done right now.

现在没有多少应该做的事情。

I did nothing that might hurt you.

伤害你的事我一点儿也没做。

2)当先行词是be后面的表语,或者关系代词本身在从句中作表语时。

e.g.The school is quite different from the one that i t used to be.

这所学校已和原来的迥然不同了。

He is not the man that h e was.

他过去不是这样的。

3)当主句以here, there开头时。

e.g.Here is a hotel that you’ve been looking for.

这就是你一直在找的旅馆。

There is a seat in the corner that is still not taken.

在角上还有一个空位。

4)当先行词有the only, the same, the very, the last等词修饰时。

e.g.These articles are the very ones that s hould be read.

这些文章才是应该读的。

Chatting was the only thing that interested her most.

聊天是她唯一感兴趣的事。

5)当先行词是序数词、形容词最高级或先行词被序数词或形容词最高级修饰时。

e.g.This is the best film that has been shown so far in the city.

这是这座城市迄今为止所放过的最好的电影。

6)当主句是以who或which开头的特殊疑问句时。

e.g.Who is the person t hat is standing at the gate?

站在门口的那个人是谁?

Which of us that k nows something about physics cannot join electric wires?

我们中间懂物理的谁不会接电线?

7)当先行词有两个或两个以上,并且分别表示人和物时。

e.g.She took photographs of t he things and people that s he was interested in.

她把她所感兴趣的人和物全拍摄了下来。

②宜用which的情况

1)在非限制性定语从句中。

e.g.Football, which is a very interesting game, is liked by many boys in our class. 足球是很有趣的运动项目,被我们班里很多男生所喜爱。

2)在定语从句中作介词的宾语,且介词位于关系代词前时。

e.g.I’m looking for a container in which I can put all these coins.

我想找一个能放下这些硬币的容器。

(四)初中阶段学习定语从句的要点

上面我们详细的复习了定语从句在初中阶段所学习的内容,为了方便同学

们记忆,下面我们把内容梳理如下。

定语从句在句子中作定语,用来修饰一个名词、名词词组或者代词。被修

饰的名词、名词词组或代词叫做先行词;在先行词和定语从句之间起连接作用

的词叫做引导词。

(1)引导词分为“关系代词”和“关系副词”。关系代词有:who, whom, whose, that, which, as。关系副词有:when, where, why, that。

注意:关系副词里面没有how。

如果要修饰方式,用that或in which引导,或者不用引导词。

e.g.I don’t like the way (that, in which) he eyed me.

我不喜欢他看我的那个样子。

(2)关系代词who在从句中主要作主语,在非正式语体里who还可以作从句中的宾语。

e.g.He is the man who wants to see you.

他就是想要见你的那个人。(who在从句中作主语)

(3)关系代词whom。

e.g.He is the man whom I saw in the park yesterday.

他就是我昨天在公园里见到的那个人。

(whom在从句中作宾语)

作宾语用的引导词可以省略,因此上面的句子可以改写如下:

He is the man I saw in the park yesterday.

(4)关系代词whose用来指人或物,(只能用作定语,若指物,它还可以

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