as可用作连词
as的用法和词性
as的用法和词性一、AS的用法：AS是一个多功能的词，它可以作为副词、连词和介词使用。
下面将详细介绍AS在不同用法下的具体意义和搭配。
1. AS作为副词：AS可用作副词表示程度或方式，常与比较级连用，表示"像……一样"或"尽可能地"。
例如：a) He can run as fast as a cheetah.（他能跑得像猎豹一样快。
）b) Please speak as clearly as possible.（请尽量说得清楚。
）2. AS作为连词：AS作为连词时，连接两个并列的句子，并且引导第二个句子表达一种对比关系。
例如：a) She can swim, as her father taught her.（她会游泳，是因为她父亲教了她。
）b) You should study hard, as your future depends on it.（你应该努力学习，因为你的未来取决于此。
）3. AS作为介词：AS也可用作介词，表达各种含义，如时间、方式、角色等。
例如：a) She works as a teacher.（她担任教师职务。
） [角色]b) We have class at 9 o'clock, as usual.（我们按惯例，9点上课。
） [时间]c) He shouted as loud as he could.（他尽可能地大声喊叫。
） [方式]二、AS的词性：除了上述用法外，AS还可作为名词、形容词和代词使用，下面将分别介绍这些用法。
1. AS作为名词：AS作为名词时，指代血清中的蛋白质标记物 "肌钙蛋白"（aspartate aminotransferase），也称为AST。
例如：a) The doctor ordered blood tests to check the patient's AS levels.（医生要求进行血液检查以检查患者的肌钙蛋白水平。
as用法总结
as用法总结as用作连词时，表示两种或多种身份、职业、职责、责任、关系、状态、行为、情形等之间的一种替换、转化、比较、变化、转折、因果、限制、条件、目的等。
下面将详细总结as 的用法。
1. as作为比较的连词时，表示某种程度上的相同或相近：- He is as tall as his father. 他和他父亲一样高。
- She is as beautiful as a rose. 她像玫瑰一样美丽。
2. as作为转折的连词时，表示一种事实和与之相对立的另一种事实：- As much as I like you, I can't marry you. 尽管我喜欢你，但我不能嫁给你。
3. as引导方式状语从句，表示方式、手段、方法、状态等： - She worked hard as if she were the owner of the company. 她工作很努力，好像她是公司的老板。
4. as引导原因状语从句，表示原因或理由：- He didn't come to the party as he was busy with his work. 他因为忙于工作所以没来参加聚会。
5. as引导时间状语从句，表示同时、随着、一旦等：- He will start working as soon as he finishes his breakfast. 他一旦吃完早饭就开始工作。
6. as引导让步状语从句，表示让步、尽管、虽然：- As tired as she was, she continued working. 尽管她很累，但她继续工作。
7. as引导条件状语从句，表示条件、假设：- I will help you as long as you promise to study hard. 只要你答应努力学习，我就会帮助你。
8. as与之配搭介词，表示身份、职业、职责、关系等：- She works as a teacher. 她是一名教师。
英语中as用法详解
as 用法详解1.用作连词，表示让步(意为：虽然，尽管)，要用于倒装句，且倒装后位于句首的名词通常不用冠词(等于though, 但语气稍弱)。
如：Child as[though]he was, he did quite well. 他虽是个孩子，但已干得很不错。
2.用作关系代词，主要用法有二。
如：(1)用在such, same, as等之后，引导限制性定语从句。
如：This is the same watch as I lost. 这块表跟我丢失的那块一样。
Such men as (=Those men who) heard of him praised him. 听说过他的人都赞扬他。
(2)单独用作关系代词，引导非限制性定语从句，可放在主句之前(常译为：正如)或之后(常译为：这一点)，且主从句之间一般要用逗号隔开。
如：He was absent, as is often the case. 他缺席了，这是常有的事。
As was expected, he succeeded at last. 正如我们所料，他终于成功了。
3.用来表示目的，下面两种句子结构都可以。
如：仔细写以便把每句话都写清楚。
正：Write carefully so as to make every sentence clear.正：Write so carefully as to make every sentence clear.4.在正式文体(尤其是文学体裁)中，as后可用倒装语序表示“…也一样”这类意思(现代英语通常so表示这一用法)。
如：He travelled agreat deal, as did most of his friends. 他去过许多地方旅游，他的多数朋友也是一样。
He plays the piano, as does his mother. 他会弹钢琴，他母亲也会。
注：用作连词，表示原因(参见because)，表示时间(参见when)。
as的用法
as的用法一、as作连词的用法1. as...as的用法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.你的钢笔写起字来和我的一样流畅。
其否定式为not 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.你的包比我的贵一倍。
几个关于as...as的常见句型：(1) as...as possiblePlease answer my question as soon as possible.请尽快回答我的问题。
(2) as...as usual/beforeShe 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 asa. 直到…为止He walked as far as the railway station yesterday evening. 昨天傍晚，他一直散步到火车站。
b. 只要As far as possible, he will help you.只要可能, 他会帮助你的。
as的六种用法
as的六种用法as的几种用法：1.做连词，固定搭配asas，意思是和一样；2.做连词，表示当的时候；3.做连词，表示因为4.做连词，表示尽管等。
1.as做连词，固定搭配asas，意思是和一样例句：My sister is as tall as me.我姐姐和我一样高。
He runs as fast as me/I.他和我跑得一样快。
She is as beautiful as me/I.她和我一样漂亮。
Being a mother isn#39;t as bad as I thought at first!做一位母亲并不像我当初想的那样糟！2.as做连词，引导时间状语从句，意思是当的时候例句：My mother was cooking fish as I arrived home.当我到家的时候，我妈妈正在做鱼。
I was always hard up as a student.我当学生时总是很拮据。
The crowd cheered as she went up the steps to the bandstand.当她走上演奏台的台阶时，人群欢呼起来。
All the jury#39;s eyes were on him as he continued.所有陪审员的目光在他继续下去时都集中在了他身上。
3.as做连词，引导原因状语从句，意思是因为例句：As rain has fallen, the air is cooler.因为下过雨，所以空气比较凉爽。
Enjoy the first hour of the day. This is important as it sets the mood for the rest of the day.享受一天中的第一个小时。
这很重要，因为这第一个小时决定当天其余时间的情绪。
4.as做连词，引导让步状语从句，意思是虽然，尽管例句：Young as he is, he has been one of the most famous painters in our country.虽然他还很年轻，但已经成为我们国家最有名的画家之一。
as的常见用法
as的常见用法as是一个多功能的词语，可以作为介词、副词、连词和代词等不同的词性。
下面是as的常见用法及其相关参考内容。
1. 作为介词时，常表示一种身份、角色或职责。
例如：- As a teacher, it is my responsibility to help students succeed.（作为一名教师，帮助学生成功是我的责任。
）- He served as a judge for many years.（他担任了多年的法官。
）2. 作为副词时，常表示程度或比较。
例如：- He ran as fast as he could.（他尽可能快地跑。
）- The coffee is hot, but not as hot as yesterday.（咖啡很热，但没有昨天那么热。
）3. 作为连词时，常引导让步状语从句。
例如：- She didn't love him, as he had hoped.（她并不爱他，正如他所希望的那样。
）- As hard as it is, we must find a solution.（尽管困难，我们必须找到解决办法。
）4. 作为代词时，常表示“像……一样”或“身为”。
例如：- He loves soccer as much as I do.（他像我一样热爱足球。
）- As a doctor, he sees many patients every day.（作为一名医生，他每天都见很多病人。
）5. 在固定搭配中，as还有其他常见用法，如：- as for（至于）: As for the weather, it's supposed to raintomorrow.（至于天气，明天可能会下雨。
）- as well as（和、也）: John, as well as his sister, is going on the trip.（约翰和他的妹妹都要去旅行。
as作为连词的用法归纳总结
as作为连词的用法归纳总结
1. 当 as 表示“当……的时候”，就像我们说“当我看到那美景，哇，真的超级震撼”，比如“As I was walking in the park, I saw a beautiful flower.”。
2. 它还能表示“因为”呢，就好像“因为他努力，所以取得好成绩”，看这个例子“As he worked hard, he got good grades.”。
3. 嘿，as 还可以表示“像……一样”哦，比如“她跳舞像蝴蝶一样优美”，那就是“She dances as gracefully as a butterfly.”。
4. 哇塞，as 还能在比较级里出现呢，就如同“他跑得比我快”，“He runs faster than me as expected.”。
5. 告诉你哦，as 也能表示“虽然”，这就像“虽然很累，但还是坚持”，“Tired as he was, he still persisted.”。
6. 最后呢，as 有时候还可以表示“按照”呀，好比“按照要求去做”，“Do it as required.”。
总之，as 的用法可真是多种多样啊，大家要好好掌握哦！。
as作为连词的用法归纳总结
as作为连词的用法归纳总结一、AS作为连词的基本用法AS作为连词具有多种用法，以下是对其用法进行归纳总结。
1. 表示两个相似或同时发生的动作：AS可以表示两个相似或同时发生的动作。
例如：- Alice walked into the room as John was leaving.（当约翰离开时，爱丽丝走进了房间。
）这句话中，“as”连接了“Alice walked into the room”和“John was leaving”，表示这两个动作几乎同时发生。
2. 表示原因或理由：AS可用于表达原因或理由。
例如：- As it was getting late, I decided to go home.（因为已经很晚了，所以我决定回家。
）在这个例子中，“As it was getting late”表达了去家里的原因。
3. 表示程度或比较：AS常被用来表示程度或比较关系。
例如：- She sang the song as beautifully as a professional singer.（她演唱得像专业歌手一样美妙。
）在这个例子中，“as beautifully as a professional singer”表示她的演唱水平与专业歌手相当。
4. 表示条件或假设：AS还可以用来表示条件或假设。
例如：- I will go to the party as long as you come with me.（只要你跟我一起去，我就会去参加派对。
）这里，“as long as”引导了一个条件状语从句。
5. 表示时间：AS也可以表示时间关系。
例如：- As the years went by, he became more and more successful.（随着岁月的流逝，他变得越来越成功。
）这个例子中，“As the years went by”表示随着时间的流逝。
二、AS作为连词衍生的常用短语和固定搭配除了基本用法外，AS还衍生出一些常见的短语和固定搭配。
as的多种用法归纳
as的多种用法归纳单词as的用法比较多样，下面店铺为大家归纳整理它的用法，希望能帮助大家学习：一、as作连词的用法1. as...as的用法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)Your pen writes as smoothly as mine.你的钢笔书写起来和我的一样流畅。
(2)This film is as interesting as that one.这部电影和那部电影一样有趣。
其否定式为not 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 far asHe walked as far as the railway station yesterday evening.昨天傍晚，他一直散步到火车站。
(2)as well asShe cooks as well as her mother does.她烧菜烧得跟她母亲一样好。
(3)as...as possiblePlease answer my question as soon as possible.请尽快回答我的问题。
(4)as...as usual/beforeShe looks as pretty as before.她看起来和以前一样漂亮。
(5)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。
as用法总结
高考常见词as用法总结近几年高考中有关as一词的题目出现过很多次，其中as或是最佳选项，或是干扰项，或是题干中的关键信息点，涉及as作为连词、介词、关系代词、副词以及习语等各种用法。
现结合高考试题将as的用法归纳如下：一、用作连词的as1. 引导时间状语从句，表示“当……的时候”，其用法与when和while类似。
例如：As a child (When he was a child), she was sent to six different schools. 此用法中as多表示从句与主句动作同时进行，一般不与状态动词连用，意为“一边……一边……”。
例如：She sang songs as she did her homework.as 还可以表示一动作紧接着另一动作发生，说明另一动作的结果，有“随着……”的含义。
例如：As time went by, we found he was an honest man./As he grew older, he lost interest in everything except gardening.例1It wasn’t until nearly a month later________ I received the manager’s reply.A. sinceB. whenC. asD. that解析：本题中的as与when一起作为干扰项，容易使同学往时间状语从句上思考，事实上本题是强调句，正确选项是D。
2. 引导原因状语从句，表示“由于，因为”，相当于because, 但通常置于句首。
例如：As he is a qualified doctor, I trust his advice on medical matters.例2_____ modeling business is by no means easy to get into, the good model will always be in demand.A. WhileB. SinceC. AsD. If解析：本题中as干扰性很强，很多同学误以为是原因状语从句，但仔细分析不难发现正确答案应是A（while表示“只要”）。
As的用法小结
As的用法小结As的用法小结As可以作为连词、介词、关系代词和副词。
下面分别介绍它们的用法。
1.作为连词，用于引导时间状语从句，表示在某个时间段或某个动作进行的时候。
需要注意的是，在一些情况下只能使用as，不能使用when或while。
这些情况包括：表示同一个人的两种动作交替进行，指一边做一边。
例如：___.表示两个同步发生的动作或行为，意思是随着某个事情的发展。
例如：As time went on。
she became more and more beautiful.表示两个短暂行为或事情几乎同时发生。
例如：I watched her as she read the book.接在名词后面表示某一个年龄段时。
例如：As a young man。
he was active in sports.2.作为介词，表示“以……身份、身份、品质、方式、角度等”。
例如：He was treated as a hero.3.作为关系代词，引导定语从句，表示“作为、像……一样”。
例如：___.4.作为副词，表示“同样地、像……一样”。
例如：He can speak Chinese as well as English.2."As" can be used as "since" or "because" to ___ clause thatis already known or us。
For example。
"As she's been ill for ages。
I will help her." Or "Since you're not feeling well。
you may stayat home." Or "As he wasn't ready。
we went without him."3."As" can also be used as "in the way that" to ___ manner。
as的用法
as的用法as可用作连词,引导比较、时间、原因及方式等四种状语从句,应注意的是,引导的比较状语从句往往有省略;引导的时间状语从句一般用一般现在时而不用一般将来时;引导原因状语从句时与“Because”和“since”引导的从句比较起起来语气最弱.as作介词,意思时“作为”,“以……身份”.例如：He came to China as a tourist five years ago.而表示像…一样时,like通常作介词用,而介词后面通常接名词,代名词和动名词.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.①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 forest.2)表示两个同步发生的动作或行?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,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.②when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.③ 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.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 ages,I will help him.As / Since you're not feeling well,you may stay at home.As he wasn't 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.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 don't speak English so/ as well as she does.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 on.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,T aiwan 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.(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,I'll 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)(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.。
as的用法总结及典型句子
as的用法总结及典型句子as 是一个多功能的词，可以作为连词、副词、介词和名词使用。
以下是关于 as 的用法总结及典型句子：1. 作为连词：- as 用于引导原因状语从句，意为“因为”：- I couldn't sleep as it was too noisy outside.(因为外面太吵，我无法入睡。
)- as 用于引导方式状语从句，意为“以…方式”：- Do it as I showed you.(按照我给你展示的方式去做。
)- as 用于引导时间状语从句，意为“当…时候”：- As I was walking home, I saw a shooting star.(当我走回家的时候，我看到了一颗流星。
)2. 作为副词：- as 用作副词表示程度，意为“同样地”、“一样地”：- He can run as fast as his brother.(他跑得和他兄弟一样快。
)- as 用作副词表示方式，意为“像这样”、“如此”：- She sang as only she could.(她唱得很棒，只有她才能这样。
)3. 作为介词：- as 作为介词，意为“作为”、“当做”、“像”：- He works as a teacher.(他是一名教师。
)- Treat others as you would like to be treated.(对待别人要像你希望被对待一样。
)4. 作为名词：- as 作为名词，意为“一样的东西”、“相似之处”：- They have the same car, but hers is not as nice as his. (他们有同样的车，但她的不如他的好看。
)- as 作为名词，意为“身份”、“资格”：- He acted as an interpreter during the meeting.(他在会议期间充当翻译。
)总结：as 的用法非常多样，可以用作连词引导从句，副词修饰动词或形容词，介词表示方式或身份，还可以作为名词表示一样的东西或身份。
as的五种用法
"as" 在不同的语境中有多种用法。
以下是"as" 的五种常见用法：1. 作为连接词（conjunction）：在这种用法中，"as" 用作连接词来引导一个从句，表示两个相似或相关的事物之间的关系。
例如：- She sings as if she were an angel.（她唱歌时仿佛是个天使。
）- As you sow, so shall you reap.（种瓜得瓜，种豆得豆。
）2. 作为介词（preposition）：作为介词，"as" 表示某种角色、身份或状态。
例如：- He works as a teacher.（他以教师的身份工作。
）- I saw her as a friend.（我把她视为朋友。
）3. 作为副词（adverb）：在某些情况下，"as" 可以用作副词，表示程度或方式。
例如：- Don't go as fast as him.（不要像他那样快。
）- He ran as quickly as he could.（他尽可能快地跑。
）4. 作为形容词（adjective）："as" 也可以用作形容词，表示两个事物的相似性或相等性。
例如：- She is as tall as her sister.（她和她姐姐一样高。
）- This book is not as interesting as the other one.（这本书不如另一本有趣。
）5. 作为动词（verb）："as" 有时也可以用作动词，表示扮演某个角色或职责。
例如：- He was asked to as the spokesperson for the team.（他被要求担任团队的发言人。
）请注意，"as" 的用法还可以因语境而有所不同。
as 用法
1。
as是连词，表示“随着”的意义。
lives是life的复数，意义是“生活”。
<BR>2。
as是连词，表示“因为，由于”的意义。
wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
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。
①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 forest.2)表示两个同步发生的动作或行?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, 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.②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。
AS用法总结as
AS用法总结asAS的常见用法主要包括作为连词、介词、副词、形容词以及名词等。
下面对这些用法进行详细总结。
1.AS作为连词：- 表示两个或多个相似情况的比较，常与相应的as...as结构搭配使用。
例如：I can't run as fast as him.我跑不像他那样快。
-表示转折，引导一个对比、相反或相似但意义相对的观点。
例如：She's very talented as a musician, but as a chef,she's terrible.她作为一个音乐家非常有才华，但作为一名厨师，她糟糕透了。
-表示原因、目的或结果。
例如：As he was late, he missed the train.由于他迟到了，他错过了火车。
2.AS作为介词：-表示身份或职业。
例如：I work as a teacher.我以一名教师的身份工作。
-表示时间、地点或条件。
例如：We met at the park.我们在公园见面。
-表示方式或状态。
例如：She was trembling as if she had seen a ghost.她抖得好像看见了鬼一样。
3.AS作为副词：-表示程度，相当于"非常"或"如此"。
例如：I'm as tired as a dog.我累得要命。
- 在有些固定短语中，as作为副词的指代示范性词，相当于"如下"。
例如：As shown in the figure...4.AS作为形容词：-表示"同样的"或"类似的"。
例如：I want the same dress as my friend.我想要和我朋友一样的裙子。
5.AS作为名词：-表示一些职业、角色或身份。
他通过努力工作在公司中升迁到了现任首席执行官的位置。
-表示所称之物的所有格形式。
高考英语As的用法总结
As的用法1。
as是连词，表示“随着”的意义。
lives是life的复数，意义是“生活”。
<BR>2。
as是连词，表示“因为，由于”的意义。
wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
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。
①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 forest.2)表示两个同步发生的动作或行?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, 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.②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。
as用法小结
as用法小结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。
① 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 he was at college, he could speak several foreign languages.When the clock struck twelve, all the lights in the street went out.② 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.③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……"。
如:The girl dances as she sings on the stage.He looked behind from time to time as he went forward.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。
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as可用作连词，引导比较、时间、原因及方式等四种状语从句，应注意的是，引导的比较状语从句往往有省略；引导的时间状语从句一般用一般现在时而不用一般将来时；引导原因状语从句时与“Because”和“since”引导的从句比较起起来语气最弱。
as作介词，意思时“作为”，“以……身份”。
例如：He came to China as a tourist five years ago. 而表示像…一样时，like通常作介词用，而介词后面通常接名词，代名词和动名词。
as in Australia“和在澳大利亚一样”。
as……as
AS +adj(原级)+AS
AS +adv(原级)+AS
as soon as 一……就
as soon as possible 尽可能快地
as early as possible 尽可能早的
as carefully as you can 尽可能认真地
as careful as you can 尽可能认真的
1。
as是连词，表示“随着”的意义。
lives是life的复数，意义是“生活”。
<BR>
2。
as是连词，表示“因为，由于”的意义。
wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
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。
①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 forest.
2)表示两个同步发生的动作或行?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.
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.
②when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.
③while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.
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 ages, I will help him.
As / Since you're not feeling well, you may stay at home.
As he wasn't 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. 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 don't speak English so/ as well as she does.
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 on.
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.
（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, I'll 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)
（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。