北考网

初中英语语法三大从句总结

时间:2023-06-08 09:21:35 文/阿林 中考北考网www.beiweimall.com

一、初中英语语法——三大从句之定语从句

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、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 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。

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)

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. 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。例如:

I do not like stories which have unhappy endings.

我不喜欢有不幸结局的小说。(which可以换成that)

Tom works for a factory which makes watches.

汤姆在一个制表厂工作。(which可以换成that)

(三)关系代词that的用法

that既可指人又可指物,在当代英语中大多指物,在定语从句作主语或宾语,作宾语时还可省略。例如:

Is she the girl that sells newspapers?

她是卖报纸的那个女孩吗?(that可以换成who)

Where is the ice-cream that was in the fridge?

放在冰箱的冰激凌哪儿去了?(that可以换成which)

Is this the book that you want to buy?

这是你要买的那本书吗? (that可以换成which,在定语从句作宾语,还可以省略)

三、关系副词引导的定语从句

常用的关系副词只有三个:when, where, why,在定语从句中充当时间、地点和原因状语。它们的用法大家不妨记住一个口诀:

the time when

the place where

the reason why

(一)关系副词when的用法

关系副词when代替的先行词表示的是时间,when在定语从句作时间状语。例如:

In Beijing July and August are the months when it rains very often.

北京的七月和八月是常下雨的月份。(when先行词是months)

Do you remember the day when we first went to the Summer Palace?

你还记得我们第一次去颐和园的那一天吗?(when先行词是day, 当代英语里when可以用that替代,这时关系代词that就变成了表示时间的关系副词)

I haven’t seen her since the year when I left Tokyo.

自从我离开东京的那一年我就一直没见到过她。(when先行词是year,同样when可以用that代替)

(二)关系副词where的用法

关系副词where代替的先行词表示的是地点,where在定语从句作地点状语。例如:

During the Spring Festival I went back to the town where I was brought up.

春节期间,我回到了生我养我的家乡。(where的先行词是town)

This is the place where Li Bai once lived.

这是李白曾经生活过的地方。(where先行词是place)

上面这个句子不可以将where改为that,因为that不能作为表示地点的关系副词。试比较下句:

This is the place that Li Bai once visited.

这是李白曾经游览过的地方。(that的先行词同样是place,但这个that是关系代词,在定语从句中作宾语,可以省略,还可以用which替换)

(三)关系副词why的用法

关系副词why代替的先行词表示的是原因,why在定语从句作原因状语。例如:

The reason why I am phoning you is to ask you whether you have got my email.

我打电话给你的原因是想问问你是否收到了我的电子邮件。(why先行词是reason, 当代英语里why可以用that替代,这时关系代词that就变成了表示原因的关系副词,还可以将why省略)

This is the reason why he came late to school.

这就是他为什么上学迟到的原因。(why先行词是reason,why可以用that替代,还可以省略)

注意:如果上面的句子将the reason省略,那么这个句子就变成了(This is why he came late to school. )表语从句,句子意思丝毫未变。

四、特殊关系代词as引导的定语从句

as是个比较特殊的关系代词,一是用在某些句型搭配里,二是独立于主句之外。下面分别讲解。

(一)在固定搭配as…as, so…as, such…as, the same…as中,as引导定语从句

You may take as many books as you want.

你想要拿多少书就拿多少。(第一个as是副词,修饰many的;第二个as才是关系代词,代替先行词books,在定语从句中作宾语)

I have got such a computer as yours.

我有一台你这样的电脑。(as是关系代词,代替先行词computer,在定语从句中作表语,因为yours后省略了is )

I have never seen so beautiful a place as Guilin.

我从未见过像桂林那样美丽的地方。(as是关系代词,代替先行词place,在定语从句中作表语,因为Guilin后省略了is )

(二)独立于主句之外,as引导定语从句

As we know,

the earth turns around the sun. 正如我们所知,地球围绕太阳旋转。

As is known to us,

(As we know和 As is known to us均为定语从句,as分别作宾语和主语,替代后面的主句。)

Taiwan is, as you know, is an inseparable part of China.

你知道,台湾是中国不可分割的一部分。(关系代词as指代整个主句,在定语从句中作宾语。)

五、关系代词who, which与that的区别

(一)关系代词who与that的区别

1. 当关系代词用作主语时,多用主格who。例如:

He who loses hope loses all.

失去希望的人就失去一切。(先行词为代词he, they, any, all, one等时,多用who)

I met Alice, who told me that she was learning Chinese.

我遇见艾丽斯,她告诉我她在学汉语。(在非限制性定语从句中,用who)

2. 当关系代词用作介词后的宾语时,用宾格whom,不用that。例如:

The man to whom our headmaster talked just now is our English teacher.

我们校长刚才与他谈话的那个人是我们的英语老师。(介词与关系代词紧密相连时,只能用宾格whom,不可用主格who)

注意:介词与关系代词不是紧密相连时,或者说介词放在句子后面时,这时可以用主格who,也可用that,还可以省略关系代词。因此,上面的这句话还可以有如下四种说法:

(1) The man whom our headmaster talked to just now is our English teacher.

(2) The man who our headmaster talked to just now is our English teacher.

(3) The man that our headmaster talked to just now is our English teacher.

(4) The man our headmaster talked to just now is our English teacher.

第4句简洁、自然,所以口语中用得最多。

3. 当关系代词泛指人时,多用that。例如:

He is a man that is never afraid of failure.

他是个从不怕失败的人。(that用来泛指人)

4. 当关系代词出现在who开头的疑问句时,应用that。例如:

Who is the girl that is talking to Tom in English?

用英语同汤姆交谈的那个女孩是谁?(避免重复使用who,以免造成误解或语义含混不清)

(二)关系代词which与that的区别

1. 当先行词为all, much, little以及不定代词anything, something, everything等时,关系代词多用that。例如:

All that glitters is not gold. 闪闪发光物,未必尽黄金。

She told me everything that she knew. 她把她所知道的一切都告诉了我。

2. 当先行词的前面有形容词最高级、序数词或限定词the only, the very, all, every, any, no等时,关系代词一般都用that。例如:

This is the best novel that I have ever read. 这是我读过的最好的一部小说。

He is the only person that has been invited to the ball. 他是惟一应邀参加舞会的人。

3. 当关系代词出现在which开头的疑问句时,应用that。例如:

Which was the hotel that was recommended to the foreign guest? 哪一个是推荐给外宾的宾馆?(这里使用that很明显是为了避免重复which)

4. 在非限制性定语从句中,关系代词一般只用which。例如:

Beijing, which is the capital of the People’s Republic of China, will host the 2008 Olympic Games. 北京是中华人民共和国的首都,将主办2008年奥运会。

5. 介词后的关系代词用which,而不用that。例如:

She has collected 600 stamps, 60% of which are German stamps. 她收集了600张邮票,其中60%是德国邮票。

六、定语从句的位置

如前所述,定语从句一般总是直接置于所修饰的名词或代词之后。有时候,定语从句与先行词之间插入了其他的短语,这样它们被分隔了,这种情况下的定语从句被称作隔离定语从句。例如:

There was a girl upstairs who was shouting and crying, obviously mad.

楼上有一个女孩,大喊大叫。很明显,她疯了。(定语从句who was shouting and crying修饰the girl,被upstairs所隔开)

A new master will come tomorrow who will teach you German.

明天要来一位新老师教你们德语了。(定语从句置于句末以示强调)

二、初中英语语法——三大从句之宾语从句

1.语序

无论主句是陈述句还是疑问句,宾语从句都必须使用陈述语序,即“主句+连词+宾语从句(主语+谓语+……)”句式。根据连接词在从句中所担任的不同成分,可分为以下四种:

1)连接词+谓语。连接词在从句中作主语。常见的连接词有:who,what,which等。如:

Could you tell me who knows the answer,please?你能告诉我谁知道答案吗?

The small children don't know what is in their stockings.这些小孩子不知道袜子里有什么东西?

2)连接词+名词+谓语。连接词在从句中作主语的定语。常见的连接词有:whose,what,which,how many,how much等。如:

He asked whose handwriting was the best in our class.他问我们班上谁的书法最好。

The teacher asked us how many people there were in the room.老师问我们房间里有多少人。

3)连接词+主语+谓语。连接词在从句中作宾语、状语或表语。常见的连接词有:who(m),what,which,how many,how much,when,why,how,where,if/whether(在句中不充当任何成分)等。如:

He hasn't decided if he'll go on a trip to Wuxi.他还没决定是否去无锡旅行。

Could you tell me what I should do with the money?你能告诉我我如何处理这笔钱吗?

4)连接词+名词+主语+谓语。连接词在从句中作宾语或表语的定语。常见的连接词有:what,which,how many,how much,how等。如:

Do you know which class he is in?你知道他在哪个班吗?

She asked me if I knew whose pen it was.她问我是否知道这是谁的钢笔。

2.连接词

1)当由陈述句充当宾语从句时,用that引导,that无词义,在口语或非正式文体中常省略。如:

He said that he could finish his work before supper.他说他会在晚饭前完成工作。

2)当由一般疑问句充当宾语从句时,用if或whether引导,意为“是否”。如:

I don't know if/whether he still lives here after so many years.我不知道这么多年后他是否还住在这儿。

但在下列情况下只能用whether:

①在具有选择意义,又有or或or not时,尤其是直接与or not连用时,往往用whether(if…or not也可以使用)。如:

Let me know whether/if he will come or not.(=Let me know whether or not he will come)让我知道他是否能来。

I don't know whether/if he does any washing or not.(=I don't know whether or not he does any washing.)我不知道他洗不洗衣服。

I wonder whether we stay or whether wego.我不知道我们是去还是留。

②在介词之后用whether。如:

I'm interested in whether he likes English.我关心的是他是否喜欢英语。

We're thinking about whether we can finish the work on time.我们正在考虑是否能按时完成这项工作。

I worry about whether I hurt her feelings.我担心是否伤了她的感情。

③在不定式前用whether。如:

He hasn't decided whether to visit the old man.他尚未决定是否拜访那位老人。

I don't know whether to go.我不知去否。

He hasn't decided whether to go by bus or by train.他还未决定是乘公共汽车去还是坐火车去。

④whether置于句首时,不能换用if。如:

Whether this is true or not,I can't say.这是否真的我说不上来。

⑤引导主语从句和表语从句时宜用whether。如:

Whether she will come or not is still a question.她是否能来还是个问题。

The question is whether we can catch the bus.问题是我们能否赶上公共汽车。

⑥若用if会引起歧义时,则用whether。如:

Please let me know if you like the book.可理解为:

a.Please let me know whether you like the book.请告诉我你是否喜欢这本书。

b.If you like the book,please let me know.你如果喜欢这本书,请告诉我。

3)如果宾语从句原来是特殊疑问句,只需用原来的特殊疑问词引导。如:

Could you tell me why you were late for the meeting this morning?你能告诉我今天早上你为什么开会迟到吗?

3.时态

含宾语从句的复合句,主、从句谓语动词的时态呼应应包括以下三点内容:

1)如果主句的谓语动词是一般现在时,从句的谓语动词可根据需要,选用相应的任何时态。如:

I don't know when he will come back.我不知道他将何时回来。

He tells me that his sister came back yesterday.他告诉我他姐姐昨天回来了。

2)如果主句的谓语动词是过去时,宾语从句的谓语动词只可根据需要,选用过去时态即一般过去时、过去进行时、过去将来时或过去完成时的某一种形式。如:

①The children didn't know who he was.孩子们不知道他是谁。

②He asked his father how it happened.他问他父亲这件事是如何发生的。

3)如果宾语从句所表示的是客观事实、普遍真理、自然现象或习惯性动作等,不管主句用什么时态,从句时态都用一般现在时。如:

The teacher said that the earth goes round the sun.老师说地球绕着太阳转。

4.注意:

if和when既可以引导宾语从句,也可以引导状语从句,应注意它们在两种从句中的意思和用法的不同。if和when引导宾语从句时,分别意为“是否”和“何时”,其时态应和主句时态相呼应;它们引导状语从句时,意思分别为“如果,假如”和“当……时候”,当主句时态是一般将来时时,其时态用一般现在时。它们常常放在含有状语从句和宾语从句的题干中进行综合考查。如:

—Do you know when he will come back tomorrow?你知道他明天什么时候回来吗?

—Sorry,I don't know.When he comes back,I'll tell you.对不起,不知道。当他回来了,我将告诉你。

—I don't know if he will come.我不知道他是否会来。

—He will come if it doesn't rain.如果不下雨,他会来的。

三、初中英语语法——三大从句之同位语从句

(一) 概念

一般来说,在主从复合句中,用作同位语的从句叫同位语从句。它通常跟在某些名词之后,用以说明或解释该名词表示的具体内容。可以跟同位语从句的名词通常有:advice, decision, fact, hope, idea, information, message, news, promise, proposal, reply, report, suggestion, word(消息),problem, question, doubt, thought等。例如:

They were delighted at the news that their team had won.

当听到他们队获胜的消息时,他们欣喜若狂。

Where did you get the idea that I could not come?你从哪儿听说我不能来?

有时同位语从句可以不紧跟在被说明的名词后面,而被别的词隔开。 如:

The thought came to him that Tom might have returned the book.

他突然想起汤姆可能已经还了书了。

(二)引导词

[寻规找矩] 请仔细观察下列句子,注意从句引导词的用法。

1. The news that Mr. Li will be our new English teacher is true.

2. He hasn’t made the decision whether he will go there.

3. The question who should do the work is being discussed at the meeting.

4. I have no idea what the boy is doing in the next room now.

5. We haven’t yet settled the question where we are going to spend our summer vacation this year.

6. I have no idea how I can get to the railway station.

7. I have no idea when he will be back.

[小结归纳]

① that引导同位语从句时无词义,也不充当任何成分,但通常不可以省略,如句1;

② whether引导同位语从句时意为“是否”,通常不能用if来代替,如句2;

③ 连接代词who, what等可以引导同位语从句,如句3, 4;

④ 连接副词where, how, when等可以引导同位语从句, 如句5,6,7。

(三) that 引导的同位语从句和定语从句

① 意义不同:同位语从句用来进一步说明前面名词的内容;而定语从句用来修饰、限定前面的先行词。试比较:

1. The news that our team has won the final match is encouraging.

2. The news that you told us is really encouraging.

[分析] 句1中that引导同位语从句,说明“news”的内容:我们队取得了决赛胜利。

句2中that引导定语从句,对“news”加以限定:是你告诉我们的,而非来自其他渠道。

② that的功能不同:that引导同位语从句时是一个纯连词,不充当任何成分;而引导定语从句时,不仅起连接作用,而且还指代先行词并在从句中充当主语、宾语等成分。试比较:

1. Dad made a promise that he would buy me a CD player if I passed the English test.

2. Dad made a promise that excited all his children.

[分析] 句1中 that引导 同位语从句,其中that无词义,也不充当任何成分;

句2中that引导定语从句,that指代promise,又在从句中充当主语,且that可以用which替换。

③ 可否省略:that在引导同位语从句时,通常不可省略。在引导定语从句时,若在从句中作宾语,通常可以省略,若作主语则不可以省略。

相关文章

中考英语语法考点最新2023-06-19 13:05:04

广东揭阳中考信息整理2023-06-10 16:16:42

疫情中考英语考点2023-06-05 06:39:37

初中英语考纲考点总结2023-06-19 05:55:19

中考英语比较级归纳2023-06-06 08:12:12

西安中考报名信息整理2023-06-04 15:12:21

上海对外经贸大学和北京交通大学(威海校区)对比哪个好(排名分数线区2024-03-31 16:25:18

河北高考排名237950名物理能上什么大学(能报哪些学校)2024-03-31 16:19:23

山东城市建设职业学院在山东招生人数和招生计划 多少人2024-03-31 16:15:16

上海农林职业技术学院在湖南招生人数和招生计划 多少人2024-03-31 16:12:52

吉林农业科技学院在湖南招生人数和招生计划 多少人2024-03-31 16:09:19

安徽高考多少分可以上云南经贸外事职业学院 招生人数和最低分2024-03-31 16:04:52

达州中考录取率多少,各高中录戎数线统计2023-06-06 21:56:40

广安中考录取率多少,各高中录戎数线统计2023-06-08 08:54:58

宜宾中考录取率多少,各高中录戎数线统计2023-06-19 04:31:29