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1、As 的 用 法 小 结名师资料总结-精品资料欢迎下载-名师精心整理-第 1 页，共 18 页 -As 的用法小结as 可以作连词、介词及关系代词和副词。现将其用法小结如下:（一）、as 作连词的用法:1.作“在-期间，当-的时候”引导时间状语从句.注意与 when、while 的用法区别。下列情形时,只用 as,而不用 when 或 while。1)用于表示同一个人的两种动作交替进行,指一边-一边.如:The girl sings as she goes to school.He looked behind occasionally as he went forward in the for
2、est.2)表示两个同步发生的动作或行为,意思是随着-的发展.如:As time went on/by,she became more and more beautiful.As children get older,they become more and more interested in everything.3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book.I thought of it just as you opened your mouth.Just as the flying worm hit her face,
3、she gave a loud cry.4)接在名词后面表示某一个年龄段时.如:As a young man,he was active in sports.when 作当的时候 解,可以指较短的(一点)时间,也可指一段时间。如:When I was at college,I could speak several foreign languages.When the clock struck twelve,I had slept for 2hours.while 常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work.Play wh
4、ile you play.2.As=Since 作既然、由于解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如:As he s been ill for age s,I will help him.As/Since youre not feeling well,you may stay at home.As he wasnt ready,we went without him.3.As=in the way that作像、按照的方式 解,引导方式状语从句。如:Do as I told you.Remember,you must do everything as I do.4
5、.用于 as-as 或 not/so/as-as中,前一个 as 是副词,后一个 as 是连词,引导比较状语从句。如:They helped the old as much as possible.I dont speak English so/as well as she does.名师资料总结-精品资料欢迎下载-名师精心整理-第 2 页，共 18 页 -5.表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为:adj./adv./n.+as+主语+谓语+主句。如:Young as he is,he knows much.Tired as they were,they walked o
6、n.6.表示也-一样。She is a doctor,as was her husband.（二）、as 作关系代词,引导定语从句,表示正如,这一点.如:He is very careful,as we all know.As is well-known,Taiwan belongs to China.另外,当先行词被 the same,such 等词修饰时,常用 as 来引导定语从句。如:Such a clever girl as she can learn anything quickly.I was reading the same book as he bought yesterday
7、.（三）、as 作介词的用法.1.表示好像。如:He dressed as a policeman.2.表示作为当作。如：I found a job as a guide.3.当某人是某身份时。如：As a child,she was sent to abroad.4.as 引导的介词短语大多用作状语,as 译为作为;少数情况可引起宾语补足语。如:As a Party member,Ill take the lead in everything.(状语)She works as a model.(状语)She has me as one of her best friends.(引起宾语补足语
8、)（四）、作副词的用法 1 表示与-等同。如：This dress is twice as expensive as that one.2 像，如等。如：As before,he remained unmoved.总之，通过以上的分析，我们对as 的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付裕如。一）as作副词，表示程度，意为“同样地”。在“as as”，“not as as”结构中的第一个 as是副词，作“和与(不)一样”解。eg：Jack is as tall as his father 杰克和他的父亲一样高。名师资料总结-精品资料欢迎下载-名师精心整理-第
9、3 页，共 18 页 -He doesnt speak English as so fluently as you他的英语说得不如你流利。二）as作介词。1作“如，像”解。eg：They got united as one man 他们团结得像一个人一样。2作“充当，作为”解。eg：As a writer，he was famous 作为作家，他是很有名的。三）as作连词，常用来连接主句和状语从句。1引导时间状语从句，作“当的时候”解，有“随着”之意，与 while 意义相近，强调两个动作同时发生；或某事一发生，另一事立即发生。eg：He shouted aloud as her ran al
10、ong 他一边往前跑，一边高声地呼喊。I was startled as he opened the door他一开门，我吓了一跳。as作连词，相当于 when。eg；As a little boy(When he was a little boy)he began to learn to play piano 他小时候就开始学弹钢琴。2引导原因状语从句，作“因为，由于”解，与 because的用法相近。eg；I must stop writing now，as I have rather a lot of work to do 我必须停笔了，因为我还有许多工作要做。3引导方式状语从句或比较状
11、语从句，作“正如，(如)像”解。例 eg：As in your country，we grow wheat in the north and rice in the south 正如(像)你们国家一样，我们在北方种小麦，在南方种大米。(方式状语从句)When at Rome，do as Romans do 入乡随俗。(方式状语从句)4引导让步状语从句，作“虽然，尽管”解。这时从句常用倒装语序，即把从句中的表语、状语或动词原形放在 as之前。eg；Strange as it may seem，it is true尽管这事看上去很奇怪，但却是真的。Try as he might，Tom could
12、 not get out of the difficulties不管怎样努力，汤姆还是摆脱不了困境。名师资料总结-精品资料欢迎下载-名师精心整理-第 4 页，共 18 页 -四）as作关系代词。1引导限制性定语从句，用在“such as”,“the same as”，“as as”等结构中，常译作“像一样的人(或物)”，“凡是的人(或物)”。例 eg：He wished to be such a man as Lei Feng was他曾希望做一个像雷锋那样的人。My hometown is no longer the same as it was 我的家乡再也不像过去一样了。2引导非限制性定
13、语从句，用来指代它前面的整个句子(即先行句)，意思是“这一点”。这个分句可以位于句首、句中或句末。eg：As is well known，oceans cover more than 70 of the earth我们知道，海洋占地球面积的百分之七十以上。五）含 as的固定词组的用法1as soon as 作“一就”解，引导时间状语从句。eg：As soon as I get to Beijing，Ill write to you 我一到北京，就给你写信。2asso long as作“只要”解，eg；AsSo long as you study hard，youll make progress
14、 只要你努力，你就会取得进步。3as ifthough常用来引导方式状语从句，作“好像，仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。eg：She loves the child as if though he were her own 她爱这个孩子如同爱自己的孩子。As ifthough也可用来引导表语从句，常用在“It appearslooksseems +as ifthough”句型结构中。eg；It appears as if though it is going to clear up看起来天要晴了。It seems as if though he knew nothing a
15、bout it.他好像对此事一无所知。4as to作“关于，至于”解。eg；There is no doubt as to his honesty 他的诚实是无可置疑的。5as much many as作“多达”，“达到之多”解。eg：名师资料总结-精品资料欢迎下载-名师精心整理-第 5 页，共 18 页 -He can earn as much as 5000 dollars a month他每月能挣 5000美元。6soas far as I know作“就我所知”解，在句中作插入语。eg：AsSo far as I know，he will come here next Monday据我
16、所知，他将于下星期一到这里来。7as a result，as a result of表示“由于的结果”。eg：She died as a direct result of the accident 她的死是那次事故的直接结果。8，as well为“也，还”之意。eg：Come early，and bring your brother as well早点来，把你的弟弟也带来。9so as to，so as to若跟动词原形，表示目的或结果。eg：He studied hard so as to pass the exam他努力学习以便通过考试。(表示目的)as用法小结一）as作副词，表示程度，意
17、为“同样地”。在“as as”，“not as as”结构中的第一个 as是副词，作“和与(不)一样”解。eg：Jack is as tall as his father 杰克和他的父亲一样高。He doesnt speak English as so fluently as you他的英语说得不如你流利。二）as作介词。1作“如，像”解。eg：They got united as one man 他们团结得像一个人一样。2作“充当，作为”解。eg：As a writer，he was famous 作为作家，他是很有名的。三）as作连词，常用来连接主句和状语从句。1引导时间状语从句，作“当的
18、时候”解，有“随着”之意，与 while 意义相近，强调两个动作同时发生；或某事一发生，另一事立即发生。eg：He shouted aloud as her ran along 他一边往前跑，一边高声地呼喊。名师资料总结-精品资料欢迎下载-名师精心整理-第 6 页，共 18 页 -I was startled as he opened the door他一开门，我吓了一跳。as作连词，相当于 when。eg；As a little boy(When he was a little boy)he began to learn to play piano 他小时候就开始学弹钢琴。2引导原因状语从句
19、，作“因为，由于”解，与 because的用法相近。eg；I must stop writing now，as I have rather a lot of work to do 我必须停笔了，因为我还有许多工作要做。3引导方式状语从句或比较状语从句，作“正如，(如)像”解。例 eg：As in your country，we grow wheat in the north and rice in the south 正如(像)你们国家一样，我们在北方种小麦，在南方种大米。(方式状语从句)When at Rome，do as Romans do 入乡随俗。(方式状语从句)4引导让步状语从句，作
20、“虽然，尽管”解。这时从句常用倒装语序，即把从句中的表语、状语或动词原形放在 as之前。eg；Strange as it may seem，it is true尽管这事看上去很奇怪，但却是真的。Try as he might，Tom could not get out of the difficulties不管怎样努力，汤姆还是摆脱不了困境。四）as作关系代词。1引导限制性定语从句，用在“such as”,“the same as”，“as as”等结构中，常译作“像一样的人(或物)”，“凡是的人(或物)”。例 eg：He wished to be such a man as Lei Feng
21、 was他曾希望做一个像雷锋那样的人。My hometown is no longer the same as it was 我的家乡再也不像过去一样了。2引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一点”。这个分句可以位于句首、句中或句末。eg：As is well known，oceans cover more than 70 of the earth我们知道，海洋占地球面积的百分之七十以上。五）含 as的固定词组的用法名师资料总结-精品资料欢迎下载-名师精心整理-第 7 页，共 18 页 -1as soon as 作“一就”解，引导时间状语从句。eg：As so
22、on as I get to Beijing，Ill write to you 我一到北京，就给你写信。2asso long as作“只要”解，eg；AsSo long as you study hard，youll make progress 只要你努力，你就会取得进步。3as ifthough常用来引导方式状语从句，作“好像，仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。eg：She loves the child as if though he were her own 她爱这个孩子如同爱自己的孩子。As ifthough也可用来引导表语从句，常用在“It appearslooks
23、seems +as ifthough”句型结构中。eg；It appears as if though it is going to clear up看起来天要晴了。It seems as if though he knew nothing about it.他好像对此事一无所知。4as to作“关于，至于”解。eg；There is no doubt as to his honesty 他的诚实是无可置疑的。5as much many as作“多达”，“达到之多”解。eg：He can earn as much as 5000 dollars a month他每月能挣 5000美元。6soa
24、s far as I know作“就我所知”解，在句中作插入语。eg：AsSo far as I know，he will come here next Monday据我所知，他将于下星期一到这里来。7as a result，as a result of表示“由于的结果”。eg：She died as a direct result of the accident 她的死是那次事故的直接结果。8，as well为“也，还”之意。eg：Come early，and bring your brother as well早点来，把你的弟弟也带来。9so as to，so as to若跟动词原形，表示
25、目的或结果。eg：He studied hard so as to pass the exam他努力学习以便通过考试。(表示目的)as.as的用法名师资料总结-精品资料欢迎下载-名师精心整理-第 8 页，共 18 页 -as.as意为和一样，表示同级的比较。使用时要注意第一个as为副词，第二个as为连词。其基本结构为：as+adj./adv.+as。例如：(1)This film is as interesting as that one.这部电影和那部电影一样有趣。(2)Your pen writes as smoothly as mine.你的钢笔书写起来和我的一样流畅。其否定式为 not
26、 as/so+adj./adv.+as。例如：This dictionary is not as/so useful as you think.这本字典不如你想象的那样有用。若有修饰成分，如twice,three times,half,a quarter等，则须置于第一个as之前。例如：Your bag is twice as expensive as mine.你的袋子比我的贵一倍。几个关于 as.as的常见句型：(1)as.as possible Please answer my question as soon as possible.请尽快回答我的问题。(2)as.as usual/b
27、efore She looks as pretty as before.她看起来和以前一样漂亮。(3)as long as.(引导条件状语从句)It took us as long as three years to carry out the plan.我们花了长达三年的时间才完成这项计划。(4)as far as He walked as far as the railway station yesterday evening.昨天傍晚，他一直散步到火车站。(5)as well as She cooks as well as her mother does.她烧菜烧得跟她母亲一样好。一些带
28、有 as.as结构的常见短语归纳：as busy as a bee 像蜜蜂一样忙碌as easy as ABC像 ABC 一样容易as deep as a well 像井一样深as light as a feather 像羽毛一样轻as soft as butter像黄油一样软as rich as a Jew 像犹太人一样富裕名师资料总结-精品资料欢迎下载-名师精心整理-第 9 页，共 18 页 -解题过程 as+形容词或副词原级 +as 1）在否定句或疑问句中可用so as。He cannot run so/as fast as you.2）当 as as 中间有名词时采用以下格式。as+形
29、容词+a+单数名词 as+many/much+名词 This is as good an example as the other is.I can carry as much paper as you can.3）用表示倍数的词或其他程度副词做修饰语时，放在as的前面。This room is twice as big as that one.Your room is the same size as mine.4)倍数+as+adj.+as 倍数+then+of This bridge is three times as long as that one.This bridge is th
30、ree times the length of that one.Your room is twice as large as mine.Your room is twice the size of mine.necessary+for还是 to?一般情况下是+to,若是表示“对某人有必要的、是必须的”之意，即 necessary 后面直接跟人称代词，就+for。看一些例句就知道了：1）Sleep is necessary to health.睡眠对健康是必要的。2）Sometimes it is not necessary to go inside in order to buy the h
31、amburgers.有时候要买汉堡包不需要进入这些餐馆。3）It is necessary for older people to understand what they think and feel.年长的人有必要了解年青人在想些什么,他们有什么感觉。“It s+adj.+of+sb.+to do”和“It s+adj.+for+sb.+to do”区别名师资料总结-精品资料欢迎下载-名师精心整理-第 10 页，共 18 页 -It is+adj.+of sb.+to do sth中的 adj.跟 sb.有关,这个 adj.是用来形容 sb.的,表示某人这么做真是太adj.了你会发现在这个
32、句型中你把sb.和 adj.提出来可以造个句sb.is(are)adj.如 Its very kind of you to help me.把里面的 sb.和 adj.提出来可以发现you are kind是说得通的.而 It is+adj.+for sb.+to do sth表示做某事对某人来说很adj.这里的 adj.是 do sth.的属性里面的 sb.跟 adj.没有直接联系如 Its difficult for you to deal with the problem.你就不能说 you are difficult了吧Its adj of sb to do sth 中 adj 是针对
33、事件，修饰 sb Its adj for sb to do sth 中 adj 是针对 sb，修饰事件用 of 常用于描述人的性质友好、可恨、善良等。用 for 常用于描述事情的性质容易、重要、关键例如：It”s very nice(kind,friendly)of you to help me carry the baggage.你真友好，帮我搬了行李。It”s very important for you to solve the problems.解答出那些难题对于你来说非常主要。by 的意思（例句）prep.preposition介词1.被,由The homework was assi
34、gned by the teacher.这些家庭作业是老师布置的。名师资料总结-精品资料欢迎下载-名师精心整理-第 11 页，共 18 页 -2.靠,用,通过They crossed the river by ferry.他们乘渡船过了河。3.经由;沿Ellen flew to Chicago by way of Minneapolis.艾伦经由明尼阿波利斯飞往芝加哥。4.在.旁边,靠近;在.手边I havent got any money by me.我身边没有带钱。5.不迟于;在.之前We had to get there by evening.我们必须在夜晚前抵达那里。6.根据,按照Ho
35、w do you know he didnt act by the rules?你怎么知道他没有按规定行事?7.(表程度)相差He missed the bus by three minutes.他晚了三分钟没赶上那班公车。8.凭,对.(发誓)I swear by God!我对上帝发誓!9.(乘除法上)以.,用.(乘或除)Nine divided by three makes three.九除以三得三。10.以.计,按Youll be paid by the hour.你的工资将按时计酬。11.在.的时候名师资料总结-精品资料欢迎下载-名师精心整理-第 12 页，共 18 页 -He had
36、to sleep by day and work by night.他只好白天睡觉,晚上工作。12.就.来说,关于Philip is a doctor by profession.菲利浦的职业是医生。13.(表连续或反复)逐个;逐批The teacher explained the text sentence by sentence.教师逐句讲解了这篇课文。14.由于She took my umbrella by mistake.她误拿了我的伞。adv.adverb副词1.经过;过去A truck went by.一辆卡车开过。2.在旁边When I filled out the form s
37、he was standing by all the time.我填写表格时,她一直站在我身旁。3.(放)在一边They put money by for later use.他们储存钱以备将来使用。4.【美国 口语】到(或进入)某人的家Please come by and have dinner with us.请到我家来一起吃晚饭。些词组：day by day little by little one by one piece by piece side by side step by step by day(night)by hand 名师资料总结-精品资料欢迎下载-名师精心整理-第 1
38、3 页，共 18 页 -by letter by mistake by plane by post come by bicycle go by air go by boat go by train know by name know by sight send.by wireless send.by electricity (all)by oneself by the way by chance by means of by no means by this means by way of by and by by and large close by pass by as well 与 as
39、 well as的用法区别as well 与 as well as的用法区别as well与 as well as只有一词之差，但意义和用法却相差甚远。一、as well 用法：1、as well常用作状语，作“又；也”解，相当于 too 或 also，常位于句末，无须用逗号与句子分开。如：I am going to London and my sister is going as well（going，too）.我要到伦敦去，我妹妹也要去。I not only play the guitar，I sing as well（I also sing）.我不但弹吉他，而且还演唱。2、as well
40、 在口语中也可用于句中，作“也好，也行”或“倒不如”解，用来缓和语气。如：You may as well go、你去也好。The weather was so bad that we might（just）as well have stayed at home.天气太坏了，早知道如此，倒不如呆在家里为好。3、as well 可以直接用于 just后，用作应答语（可视为Its just as well、的省略），作“幸亏，幸而；无妨；没关系”解。如：We were too late to see the film.我们去得太晚了，没有看上电影。Just as well、I hear it isn
41、t very good.不必遗憾，我听说电影也不怎么样。名师资料总结-精品资料欢迎下载-名师精心整理-第 14 页，共 18 页 -二、as well as 用法1、as well as常用来连接两个并列的成分，作“也，还”解。它强调的是前一项，后一项只是顺便提及。因此连接并列主语时，谓语动词与前一项一致；而用not only.but also.连接时，谓语动词与后一项一致。如：Your wife as well as you is friendly to me.不仅你而且你的妻子也对我很友好。（Not only you but also your wife is friendly to me
42、、）Electric energy can be changed into light energy as well as into sound energy.电能既可以被转变成声能，又可以被转变成光能。2、as well as 用来表示同级比较，指“一样好”。如：You look as well as you did ten years ago.你的身体看起来还和十年前一样好。He plays the guitar as well as you.他的吉他弹得和你一样好。验收台：上面讲了 as well与 as well as的用法，你是否掌握了？一起来做一下下面的单项填空题。1、They p
43、lay all kinds of instruments and sing _.A、also B、either C、as well D、as well as 2、Tom，_ Jane and Rose，_ going to the farm on foot.A、as long as；is B、as well as；are C、as long as；are D、as well as；is 3、They travel at full speed by day _.A、and night B、and by night as well as C、as well at night D、as well a
44、s by night 4、Mrs Black writes _，if not better than，her husband.A、as well as B、so well C、so well as D、as well 5、We expect her to do the housework as well _ after the children.名师资料总结-精品资料欢迎下载-名师精心整理-第 15 页，共 18 页 -A、as look B、as looking C、and look D、looking 6、She doesnt speak _ her friend，but her writ
45、ten work is excellent.A、as well as B、as often as C、so much D、as good as 7、Which of the following sentences is right？A、Both father and as well as mother love me.B、Father as well as mother loves me.C、Both father as well as mother loves me.D、Not only father but also mother love me.8、You feel _ you did
46、yesterday，dont you？A、as good as B、as well C、so good D、as well as 9、Im sure I was right、It is just _ I didnt lend him the money.A、so well B、as well as C、as well D、the same as Key:1 5 C D D A A 6 9 A B D C 四级语法备战-as 的用法大全as可以作连词、介词及关系代词。现将其用法小结如下:一、as作连词的用法:1.作当的时候,引导时间状语从句。注意与when、while 的用法区别 when作当的
47、时候 解,可以指较短的(一点)时间,也可指一段时间。如:When he was at college,he could speak several foreign languages.When the clock struck twelve,all the lights in the street went out.while 常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work.Play while you play.但属下列情形时,只用 as,而不用 when或 while。A)用于表示同一个人的两种动作交替进行,指一边,一边。
48、如:The girl dances as she sings on the stage.He looked behind from time to time as he went forward.名师资料总结-精品资料欢迎下载-名师精心整理-第 16 页，共 18 页 -B)表示两个同步发展的动作或行为,译为随着。如:As time went on/by,she became more and more worried As children get older,they become more and more interested in the things around them.C)表
49、示两个短促行为或事件几乎同时发生。如I thought of it just as you opened your mouth.Just as the flying worm hit her face,she gave a loud cry D)后接名词表示某一年龄段时,用 as。如:As a young man,he was active in sports.2.as=since,作既然、由于解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如:As/Since youre not feeling well,you may stay at home.As he wasnt
50、ready in time,we went without him.3.as=in the way that,作像、按照的方式 解,引导方式状语从句。如:He speaks English as Americans do.Remember,you must do everything as I do.4.用于 as.as.或 not so/as.as.中,前一个 as是副词,后一个 as是连词,引导比较状语从句。如:They helped the old man as often as possible.I dont speak English so/as well as he does.5.