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As 与 which 用法区别

As    与  which   用法区别
As    与  which   用法区别

As 与which 用法区别

㈠关系代词as 引导的定语从句

关系代词as 既可以引导限制性定语从句,也可以引导非限制性定语从句,as 在从句中作主语、宾语或表语。

引导限制性定语从句常用下列句式:

1.such ﹢名词﹢as …像……一样的,像……之类

the same ﹢名词﹢as…和……一样的

其中AS 在从句中充当主语宾语或表语。如:

We have found such materials as are used in their factory

He is not the same man as he was

He has such a book as I have

He has the same book as I have

2.注意such as 引导的定语从句与such that 引导的状语从句的区别:

He is such a clever boy as everyone likes 定语从句

He is such a clever boy that everyone likes him 状语从句

as 的用法总结

例1. the same…as;such…as 中的as 是一种固定结构, 和……一样……。例如:

I have got into the same trouble as he (has). 我碰到了跟他一样的麻烦。

例2. as可引导非限制性从句,常带有\'正如\'。例如:

As we know, smoking is harmful to one\'s health. 如我们所知,吸烟有害健康。

As is known, smoking is harmful to one\'s health.

As是关系代词。例1中的as作know的宾语;例2中,它充当从句的主语,谓语动词know 要用被动式。

㈡as 与which 区别

关系代词as和which

在非限制性定语从句中,as和which可代替整个主句,

二者的区别主要在于:

(1) as引导的非限制性定语从句既可以在主句前,也可以在主句后,有时还可以插入句中,常带有“正如……,正像……”的意思。而which引导的非限制性定语从句只能放在主句之后,翻译成“这”,如:

As we know, smoking is harmful to one's health.

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。

(2) 主句中出现the same, such修饰先行词,需选择as做关系代词在定语从句中作主语或宾语,如:

He has such a book as I have

典型例题

1)Alice received an invitation from her boss, ___came as a surprise.

A. it

B. that

C. which

D. he

答案C. 此为非限定性从句,不能用that修饰,而用which.,it 和he 都使后句成为句子,

两个独立的句子不能单以逗号连接。况且选he句意不通。

2)The weather turned out to be very good, ___ was more than we could expect.

A. what

B. which

C. that

D. it

答案B。which可代替句子,用于非限定性定语从句,而what不可。That 不能用于非限定性定语从句,it不为连词,使由逗号连接的两个句子并在一起在英语语法上行不通。

3)It rained hard yesterday, ____ prevented me from going to the park..

A. that

B. which

C. as

D. it

答案B. as 和which在引导非限制性定语从句时,这两个关系代词都指主句所表达的整个意思,且在定语从句中都可以作主语和宾语。但不同之处主要有两点:

(1)as 引导的定语从句可置于句首,而which不可。

(2)as 代表前面的整个主句并在从句中作主语时,从句中的谓语必须是系动词;若为行为动词,则从句中的关系代词只能用which.。在本题中,prevent由于是行为动词,所以正确选项应为B。

(3)从句为否定意义用which ,肯定含义用as

He is late again ,as is often the case

He was admitted into the university ,which was unexpected

(4) as 多用于下列习惯用语中

As is known , as is often the case , as is expected

As you see ,as often happens

用as which that what it 填空

He is such a lovely boy____everyone likes

He is such a lovely boy ____everyone likes him

____Is known to us all is that China has the largest population in the world

____Is known to us all that China has the largest population in the world

____Is known to us all, China has the largest population in the world

The student that the teacher thinks best played truant yesterday , ____made the techer angry

as与which引导定语从句的用法辨析

as与which引导定语从句的用法辨析 一、as和which都能引导的定语从句 当非限定性定语从句置于句末时,as和which都可用来引导这个定语从句。但含义有区别。  1、 Dorothy was always speaking highly of her role in the play, _______ , of course, made the others unhappy. A. who B. which C. this D. what  2、The number of senior high school students is increasing, _______ is mentioned above. A. that B. it C. such D. as 二、只能用which引导的定语从句 1. 在限定性定语从句中。例如: The project _______ a British businessman has invested in is under construction at present. A. which B. as C. what D. why 2. “介词+关系代词”引导定语从句时,只能用which。例如: Recently I bought an ancient Chinese vase, _______ was very reasonable. A. which price B. the price of which C. its price D. the price of whose 3. 当后置的非限定性定语从句是否定结构时,只能用which引导。例如: The result of the experiment was very good, _______ we hadn't expected. A. when B. that C. which D. what  三、只能用as引导的非限定性定语从句 1. 置于句首时,非限定性定语从句只能用as引导。例如: _______ is known to everybody, the moon travels round the earth once every month. A. It B. As C. That D. What 2. 在the same...as 结构中,意思是“像……那样的”。例如:

定语从句中that 和which的用法

定语从句中的that和which的用法 引导定语从句的关系代词有:that(指人或物),which (指物),who (指人).指人时可用that或who ;指物时可用that 或which 。 That和which在从句里都可以做宾语和主语,做宾语时可以省略。指物时,两者一般可以互换,但在下列情况下只能用that: 1)当先行词是all ,any ,anything ,everything ,nothing 或被它们修饰时.例如: Is there anything that I can do for you 有什么可以为你做的吗? All that can be done must be done . 凡是能做的都必须做. 2)当先行词被形容词的最高级或序数词修饰时.例如:That is one of the most interesting books that are sold in the bookshop . 那是这家书店出售的最有趣的书之一. The first thing that we should do is to get some food . 我们该做的第一件事是弄点吃的. 3)当先行词有:the only ,the very ,the same ,the last 等修饰时.例如:

My necklace is not the only thing that's missing . 我的项链不仅是丢掉的东西. 4)当主句以who或which开头时,定语从句中引导词用that ,不用which 或who .以避免重复.例如: Who is the girl that is wearing a red coat 正穿一件红色外套的女孩子是谁? 5)当先行词既有人又有物时,用that .例如: The writer and his novel that you have just talked about are really well known . 你刚才谈起的那位作家以及他的小说确实很著名. 请注意: 以下几种只能使用which的情况: 1.引导非限制性定语从句,用which。 2.在“介词+关系代词”结构中,关系代词必须用which。 如:The house in which we live is very large. 我们住的房子非常大。 This is the reference book of which the teacher is speaking. 这就是老师正在谈及的那本参考书。 注意:如果介词不放在修饰事物的限定性定语从句的句首,which就可换为that,例如:This is the question which/that we've had so much discussion about. =This is the question about which we've had so much discussion.

最新定语从句中的that和which的区别

定语从句中的that和which的区别: that和which在从句里都可以做宾语和主语,做宾语时可以省略。在定语从句中,有种说法叫"关宾省",意思是关系代词在限制性定语从句中作宾语可以省略,不管是that,which,还是whom。但是which能引导非限制性定语从句,that则不行。 只能用that的几种情况: 1. 当先行词为all, much, little, none及由any, every, some, no所构成的复合不定代词时。We should do all that is useful to the people. Please tell me anything that you know about the matter. 2. 当先行词被any, few, little, no, all, much, some等词修饰时。 You can take any seat that is free. There is little work that is fit for you. 3. 当先行词为序数词或被序数词所修饰时。 When people talk about the cities of China, the first that comes to my mind is Beijing. This is the fourth film that has been shown in our school this term. 4. 当先行词为形容词最高级或被形容词最高级修饰时。 The best that I could do was to apologize. This is the most interesting story book that I have ever read. 5. 当先行词被the very, the only, the last, the just, the same等修饰时。 This is the very book that I’m looking for. The only thing that we could do was to wait. 注意:先行词被the same修饰时,关系代词也可用as。 I need the same book that / as you have. 6. 当先行词既包含人又包含物时。 They are talking of the heroines and their deeds that interest them. 7. 当先行词是疑问代词who,which,what或主句以这些词开头时。 Who that has ever worked together with him doesn’t admire him? Which is the star that is nearer to the earth? 8. 当先行词为主句表语或关系代词为从句表语时。 That’s a good book that will help you a lot. Our school is no longer the place that it used to be. 9. 先行词为time时,当time表示次数,引导词用that, 可省略。当表示时间,可用that 或when引导,都可省略。 I do remember the first time(that) I had ever heard the sweetest voice in the world. I did't remember the exact time (when/that)I arrived in Shanghai last month. 只能使用which的情况: 1. 在“介词+关系代词”结构中,关系代词必须用which。 The house in which we live is very large. This is the reference book(参考书)of which the teacher is speaking. 注意:如果介词不放在修饰事物的限定性定语从句的句首,which就可换为that。 This is the question which/that we’ve had so much discussion about. =This is the question about which we’ve had so much discussion. 2. 先行词为“those+表事物的复数名词”时,关系代词通常只用which而不用that。 You should grasp well those skills which may be used in the future work.

as和which的用法区别

非限制性定语从句中的as和which ■as 和which的相同点 (1) as 和which都可引导非限制性定语从句,放在主句之后;在非限制性定语从句中充当从句的主语、宾语或表语。如: Tom has found a good job, as / which we all hope. 汤姆找到了一件好工作,这正是我们大家所希望的。 (2) as 和which都可代表整个句子的内容或主句中的某一成分。如: His mother is ill, which makes him very sad. 他母亲病了,这件事情使他很难过。 He has made great progress, as / which makes us very happy. 他进步了,这使得我们很高兴。 以上两句中的as / which都指前面整个句子的内容。 Though he has lots of money, he still rides his old bike, which was bought ten years ago. 尽管他很有钱,但是他还骑着他的旧单车,这单车是十年前买的。 There you can meet many writers as you have ever read in books. 在那里,你可见到你在书中所读过的很多作家。 ■as与which的区别 (1) 当先行词前面有so + adj. + a / such + (a) + adj. , the same等词修饰时,引导词只能用as,而不用which。如: She is so nice a girl as we all like. 她是个我们大家都喜欢的如此好的女孩。 It is such an interesting book as we all want to read. 它是本我们大家都想读的有趣的书。上面两句中的as就不能用which替换。 (2) as 在从句中常作宾语;作主语时,从句的谓语动词常为系动词,即:系表结构或被动结构。如: As is said above, he has conquered the difficulty. 正如上面所说,他征服了困难。

定语从句中where和which的区别

定语从句中where和which的区别

定语从句中where和which的区别 1.This is the factory_________we visited yesterday. 2.This is the stable__________Jesus Chirst was born. 1,which 2.where 分析:关键是看从句中的动词。如果是及物动词(顾名思义,就是必须要接物做宾语的动词,或能用做被动的动词),则表明从句缺宾语,修饰人用who/whom/that。修饰物用that/which. 如动词是不及物(顾名思义就是不需要接物做宾语的或要接宾语时前面必须要加介词的,即用介宾的动词),则说明从句不缺宾语,可能是状语(或介宾)。表地点用where.时间用when. 如题1:从句的动词是visit,我们说参观某个地方说:visit some place。而不说visit in the place所以visit是及物动词。所以缺宾语,修饰物故用which. 如题2,我们说出生于某地用be born in,如:i was born in beijing 而不说i was born

beijing.故说明born 后不直接跟宾语,应用介宾,或关系副词(where/when)所以此处填in which 也是正确的。 所以在平时的练习中应注意动词的及物于不及物性1这是解决这类题的关键之一。扩展练习: 1.These are the days ____ I spent with my mom. (when) 2.These are the times _____ I experienced .(which) 英语定语从句that ,where ,which 的区别 例如:(1) I love places ____ the people are really fridendy A.that B.which C.where D.who (2) This is the place ____ I have ever visited there B.whom C.he D.which (3).This is the house ____ I want to buy A.In which B.that C.what D.that (4)this is the museum ____ we visited last year A.where B. in which C.which D.in that

关系代词which用法说明

关系代词which用法说明 1.既可引导限制性定语从句,也可用作非限制性定语从句。如: This is the photo (that) I took. 这就是我拍的照片。 The river, which flows through London, is called the Thames. 这条流经伦敦的河叫泰晤士河。 2. which引导定语从句时,它在从句中主要用作主语或宾语,但有时也可用作定语, 在意义上大致相当于this或that。如: We told him to consult the doctor, which advice he took. 我们叫他去看医生,他听取了我们的劝告。 He is studying economics, which knowledge is very important today. 他学经济学,这种知识现今很重要。 注意,它与用作定语的关系代词whose用法不同——whose引导定语从句时,它在意 义上大致相当于one’s。如: Wolves are highly social animals whose success depends upon cooperation. 狼是高度群体 化的动物,它们的成功依赖于合作。 3.关系代词which原则上只指物,不指人;指人要用who。但是,有时指的不是具体的某人,而是指人的属性(如职业、身份、地位、职务、品质、特征等),则要用which 而不用who。如: He talked like a scholar, which he was not. 他说起话来像个学者,其实他没什么学问。 She talked like a native, which she hardly was. 她说起话来像是个本地人,其实她不见得是。 They accused him of being a traitor, which he was. 他们指控他是叛徒,他真是叛徒。 4.注意不要一看到句前有逗号,就以为一定要用which来引导非限制性定语从句。如以下几句逗号后的that均不能换成which(原因是逗号前的句子为状语从句):If a book is in English, that means slow progress for you. 如果一本书是用英语写的,那就意味着你要读慢些。 If he’s only interested in your looks, that just shows how shallow he is. 如果他只对你的相 貌感兴趣,那就说明他相当浅薄。 When I say two hours, that includes time for eating. 我说两小时,那是包括了吃饭的时间。

关系代词as与which的用法区别

关系代词as与which的用法区别 ■as 和which的相同点 (1)as 和which都可引导非限制性定语从句,放在主句之后;在非限制性定语从句中充当从句的主语、宾语或表语。如: Tom has found a good job, as / which we all hope. 汤姆找到了一件好工作,这正是我们大家所希望的。 (2)as 和which都可代表整个句子的内容或主句中的某一成分。如: His mother is ill, which makes him very sad. 他母亲病了,这件事情使他很难过。 He has made great progress, as / which makes us very happy. 他进步了,这使得我们很高兴。 以上两句中的as / which都指前面整个句子的内容。 Though he has lots of money, he still rides his old bike, which was bought ten years ago. 尽管他很有钱,但是他还骑着他的旧单车,这单车是十年前买的。 There you can meet many writers as you have ever read in books. 在那里,你可见到你在书中所读过的很多作家。 ■as与which的区别 (1)当先行词前面有so + adj. + a / such + (a) + adj. , the same等词修饰时,引导词只能用as,而不用which。如: She is so nice a girl as we all like. 她是个我们大家都喜欢的如此好的女孩。 It is such an interesting book as we all want to read. 它是本我们大家都想读的有趣的书。 上面两句中的as就不能用which替换。 (2)as 在从句中常作宾语;作主语时,从句的谓语动词常为系动词,即:系表结构或被动结构。如: As you expected, he turned up on time. 正如你所愿,他按时到了。 As is said above, he has conquered the difficulty. 正如上面所说,他征服了困难。 (3)当非限制性定语从句放到主句的前面时,引导词只能用as,而不用which。如: As is planned, we got there before eight. 正如计划,我们再把店前到达了那儿。

Forwhich用法小结

Which在定语从句中的用法小结 一.引导限制性的定语从句,先行词为物。 1.在从句中做主语,宾语,可以与that互换,而且做宾语时可省略。 He lost the bike (which/that)his father gave to him .(他丢了父亲给他的那辆自行车。) The film which/that is directed by ZhangYimou is popular with many movie-goers.(张艺谋指导的这部电影很受电影爱好者的欢迎。) The part (which/that)he played in the film is welcome by many people. (他在电影中扮演的角色受到了很多人的欢迎。) 2.当先行词为时间,原因,地点,并在从句中做状语时,可用介词+which引导I’ll never forget the days on which/when we had a good time.(我将永远不会忘记我们一起度过美好时光的日子。) During the next ten years I have never been to Spain in which/where I was born.(在最近的十年我再也没去过我出生的地方---西班牙) The world in which/where we live is developing fast.(我们生活的世界发展的很快。) He didn’t explain the reason for which /why he missed the class-meeting. (他没有解释他没有参加班会的原因。) 3.介词后只能用which做宾语 The place about which we talked is no longer what it used to be.(我们讨论的那个地方不再是原先那个样子。) The cat on which he played a joke was lovely.(他开玩笑的那只猫很可爱。)4.可将whose+n.换成the +n.+of which/of which+the +n. He lives in a house ,whose door faces south. He lives in a house ,the door of which faces south. He lives in a house ,of which the door faces south. 二.引导非限制性的定语从句 1.指代所修饰的先行词,在从句中充当主语或宾语,充当宾语时不能省略。 He failed the exam,which was rather difficult.(他考试不及格,这次考试相当难) He failed the exam,in which he cheated. (他考试不及格,在这次考试中他作弊。) 2.指代先行句,在从句中充当主语或宾语 He failed the exam,which made his parents angry。(他考试不及格,这件事使父母很生气) He failed the exam,with which his parents were angry.(他考试不及格,父母对这件事很生气)) 3.注意区分which引导的非限制性的定语从句,as引导的定语从句以及强 调句it is---that---句型的区别:as引导的定语从句放在句首,意思是“这一点”;而which引导的非限制性的定语从句放在主句的后面,并用逗号隔开,

that与which的用法区别

that与which的用法区别 两者都可指物,常可互换。其区别主要在于: 1.引导非限制性定语从句时,通常要用which: The current, which is very rapid, makes the river dangerous. 水流湍急,使这条河很危险。 He has to work on Sundays, which he doesn’t like. 他得在星期天工作,他是不喜欢这样的。 The London team, which played so well last season, has done badly this season. 伦敦队上一个季度打得很好,这个季度却打得很差。 2.直接放在介词后作宾语时,通常要用which: She may be late, in which case we ought to wait for her. 她可能晚到,那样我们就要等等她。 The documents for which they were searching have been recovered. 他们找寻的文件已找到了。 This morning some port wine came, for which I have to thank you. 今天早上送来一些波尔图葡萄酒,为此我得向你道谢。 注:有时“介词+which”引导的定语从句可以转换成“介词+which+不定式”结构:He had only the long nights in which he could study. =He had only the long nights in which to study. 他只有漫漫长夜可用来学习。 He had a couple of revolvers with which he could defend himself.= He had a couple of revolvers with which to defend himself. 他只有一两把手枪用来自卫。 3.当先行词是下列不定代词或被它们修饰时much, little, none, all, few, every(thing), any(thing), no(thing) 等时,通常用that: All that she lacked was training. 她缺的只是训练。 Have you everything that you need? 你需要的东西都有了吗? The sleeping man’s subconscious mind retained everything that was said around him. 这位酣睡的人头脑的下意识能记住他周围的人说的话。 She would never do anything that was not approved of by her parents. 她父母不赞同的事她绝不会做。 4.当先行词有the very, the only, the same 等修饰时,通常用that: This is the only example that I know. 我知道的例子只有这一个。 Those are the very words that he used. 那是他的原话。 5.当先行词有形容词最高级或序数词(包括last, next等)等修饰时,通常用that: This is the best dictionary that I’ve ever used. 这是我用过的最好的词典。 The first thing that you should do is to work out a plan. 你应该做的第一件事是订个计划。

(完整版)as和which引导非限制性定语从句的区别

As与which引导非限定性定语从句辨析 1.as引导非限制性定语从句,只代表主语或主句的一部分所表达的意思(不能指代某个名词或代词),可以放在主句前,后或中间,在从句中作主语或宾语、例如: As is known to all, he is the best student in our class. (as指代整个句子,作主语,置于句首) He opposed the idea, as could be expected. (as 指代整个句子,作主语,置于句末) As we all know, he studies very hard. (as 指代整个句子,作宾语,置于句首) Taiwan is, as you know, an inseparable part of China. (as指代整个句子,作宾语,置于句中) 2.在非限制性定语从句中,which和as引导定语从句时的区别: a. which引导的从句不能放在主句前,而as引导的从句则既可以放在主句前,也可以放在主句后。例如: As (正确) is often the case, he is absent. Which (错误) He saw the girl, as (正确) He had hoped. Which (正确) b.用能做关系代词,as和which都可以指代一个句子,但as有“正如”、“就像”之意,which则没有此含义。 He is a foreigner, as I know from his accent. (as指代一个句子,意为“正如”、“就像”) He has to work on Sunday, which he doesn’t like. (which指代一个句子,没有“正如”、“就像”) c.当从句的谓语动词是be或相当于联系动词的seem, become等时,可用as或which作主语。但当从句的谓语是行为动词时,只能用which作主语。例如: He married her, as (正确) was / seemed natural. Which (正确) He saw the girl, as (错误) delighted him. Which (正确

高中英语定语从句 --- As 和which 引导定语从句精讲精练

关系代词as和which 引导的定语从句 as和which引导非限制性定语从句,有相同之处也有不同之处。具体情况是:1. As和which都可以在定语从句中做主语或者宾语,代表前面整个句子。 He was honest, as/which we can see. as 引导非限制性定语从句,可放在主句之前,或者主句之后,甚至可以切割一个主句;which引导的非限制性定语从句只能放在主句之后。另外,as有“正如……,正像……”的意思 which 指代整个句子不可置于句首只能位于主句后。 1. They d idn’t come to school on time, which made the teacher angry. 2. The sports meeting was put off, which astonished (吃惊)us greatly. 3. His father died last year, which made it impossible for him to go to school. 4. He didn’t pass the exam, which disappointed his parents. as 引导定语从句,位置灵活,可位于句首、句中和句末。 As we all know, China is a developing country. The number of the visitors, as we had expected, was over 200. China is a great country with a long history, a s is known to all. 注意:当主句和从句存在逻辑上的因果关系时,主句与从句有因果或并列,从句谓语动词是“系动词+adj" 使用which Our class has won the volleyball match, which is inspiring. Tom suddenly fell ill, which made us sad. Tom突然病倒,这使得我们很伤心。Which引导的非限制性定语从句在从句中做主语,其代指整个主句,主从句的关系是因果关系,因为他的病,所以我们伤心。 The road was too slippery, which caused lots of accidents. 路太滑了,以至于引起了很多事故。which引导的非限制性定语从句在从句中做主语,其代指整个主句,主从句的关系是因果关系,因为路滑,所以出事。 (1) As is known to all, China is a developing country. (2) He is from the south, as we can see from his accent. (3) John, as you know, is a famous writer. (4) He has been to Paris more t han several times, which I don’t believe. (5) Tom was always late for school, which made his teacher angry.

which引导的定语从句的用法

which引导的定语从句的用法 WHICH可以引导定语从句,修饰表示事物的先行词,在定语从句中充当主语、宾语或者表语。例如:HEWASREADINGABOOK, WHICHWASABOUTWAR.他正在读一本关于战争的书。(关系代词WHICH在修饰BOOK的定语从句中充当主语。) HEWASREADINGABOOK,WHICHHEHADBOUGHTFROMLONDON.他正在读一本书,这本书是从伦敦买回来的。(关系代词WHICH在修饰BOOK的定语从句中充当宾语。) WHICH引导非限定性定语从句时有一个特殊用法,即它所引导的非限定性定语从句修饰主句中更多的部分甚至整个主句(这时被定语从句所修饰的“先行词”要作广义理解),WHICH仍在定语从句中作主语、宾语或表语。例如:HESETFREETHEBIRDSHAPPILY, WHICHWASACELEBRATIONFORHISSUCCESS.他开心地把鸟放了,这是对他成功的一种庆祝。 把非限定性定语从句“WHICHWASACELEBRATIONFORHISSUCCESS”的先行词视为主句中的“THEBIRDS”显然不符合整句的语境,被 “WHICHWASACELEBRATIONFORHISSUCCESS”所修饰的是整个主句,WHICH所引导的这类特殊的非限定性定语从句对主句所叙述的情况进行某种意义的补充说明,WHICH常可译为“这一点,这件事”。 [考题1] YOUCANFINDWHATEVERYOUNEEDATTHESHOPPINGCENTRE, ____ISALWAYSBUSYATTHEWEEKEND.(2006上海春) A.THAT B.WHERE C.WHAT D.WHICH [答案]D

which和that的区别

that与which两者都可指物,常可互换。其区别主要在于: 1. 引导非限制性定语从句时,通常要用which。如:She received an invitation from her boss, which came as a surprise. 她收到了老板的邀请,这是她意想不到的。 2. 直接放在介词后作宾语时,通常要用which。如:The tool with which he is working is called a hammer. 他干活用的那个工具叫做锤子。 3. much, little, none, all, few, every(thing), any(thing), no(thing) 等时,通常用that。如:There was little that the enemy could do but surrender. 敌人无法,只有投降了。All [Everything] that can be done must be done. 凡能that can be done must be done. 4. 当先行词有the very, the only, the same 等修饰时,通常用that。如:This is the only example that I know. 我知道的例子只有这一个。Those are the very words that he used. 那是他的原话。 5. 当先行词有形容词最高级或序数词(包括last, next等)等修饰时,通常用that。如:。如:This is the best dictionary that I’ve ever used. 这是我用过的最好的词典。The first thing that you should do is to work out a plan. 你应该做的第一件事是订个计划。 6. 当关系代词在定语从句中用作表语时,通常用that。如:China is not the country (that) it was. 中国已不是过去的中国了。 7. 当先行词是一个既指人又指物的并列词组时,通常用that。如:They talked about the persons and things that most impressed them. 他们谈论了使他们印象最深的人和事。他们谈论了使他们印象最深的人和事。 8. 当要避免重复时。如:Which is the course that we are to take? 我们选哪门课程?

as与-which的区别

as和which引导定语从句的区别 我们先看两道高考题: 1._____ is known to all,China will be an _____ powerful country in 20 or 30years'time. A.That;advancing B.This;advanced C.As;advanced D.It;advancing 2.He made another wonderful discovery,_____ of great importance to science.A.which I think is B.which I think it is C.which I think it D.I think is 分析:第一题考查了as在从句中作主语的定语从句,意为“正如”,而ad- vanced country表示发达国家;第二题考查了which引导的非限制性定语从句,I think是插入语。这两个句子分别含有as和which引导的定语从句,现就其用法作一说明: 一、as引导的定语从句表示说话人对话语的看法、态度、依据、解释或评论。具有下列特点: 1.as用于引导定语从句时,具有“正如……、像……、由……而知”等语义。如: He was strongly against the plan,as could be expected.(正如所料,他强烈反对这项计划。) As he hoped he would,he saw the girl.(像他希望的那样,他见到了那个女孩。)2.as引导的定语从句在语义上要和主句保持一致,而which可不一定,如果语义不一致,则要用which来替代as。如: He married again,as(which)was natural.(他又结婚了,这是自然的。) 3.as引导的定语从句,其先行词可由以下词来修饰,the same /such /as等。也可以由

定语从句中 which,that 的用法与区别

定语从句中 which,that 的用法与区别 只能使用that的情况: 1.当先行词是nothing, something, anything, all, each等不定代词时。 e.g. Do you have anything that is important to tell me? 2.当先行词被all, any, some, no, not, every, each等修饰时。 e.g. I have some books that are very good. 3.当先行词被形容词最高级、序数词(包括last, next等)所修饰时。 e.g. This is the first book that I bought mysel f. The biggest bird that I caught is this bird. 4.主句是以which或who开头的特殊疑问句时 e.g. Which is the bike that you lost? 为了避免重复时用that Who is the woman that was praised at the meeting. 5.当先行词在从句和主句中都作表语时,无论先行词是人还是物. China is no longer the country that she was. 6.如有两个定语从句,其中一个已用which引导,另一个宜用that . Edison built up a factory which produced things that had never been seen before. 7.在there be句型中,只用that. He asked for the latest book (that) there is on the subject. 8.当先行词被the very, the last, the next, the only,the same 等词修饰时。 e.g. This is the very book that I lost yesterday. 9.当先行词又有人又有物时。 e.g. I won’t forget the things and the persons that I saw. 10. 先行词被all, every, no, any, little, some, much等修饰时。 I’ve read all the books that are not mine. 只能使用which的情况。 1、非限制性定语从句(即通常用逗号与主句隔开,如果去掉逗号,整个句子仍能表达完整的意义的定语从句)中。 e.g. Mary has a book, which is very precious. 2、在介词之后。 e.g. This is a house in which lives an old man. 3、当主句中的主语被that修饰时。 e.g. That dog which I found in the street belongs to Mary. 4. 非限定性定语从句修饰的是前面的整个句子,而且关系代词和关系副词前面有逗号, 用which开始的定语从句修饰前面半句 e.g. He will wear no clothes, which will distinguish(区分,辨别)him from his fellow men.

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