as 用法
as的用法和固定搭配
as的用法和固定搭配一、AS的用法简介AS（as）作为一个英语单词，在不同的语境中可以有多种用法和固定搭配。
无论是在口语还是书面语中，正确使用AS可以帮助我们表达更准确、流畅的意思。
本文将针对AS的不同用法进行详细介绍，帮助读者更好地理解和运用这个常见而重要的词汇。
二、表示身份或职业AS作为一个连词时，常用于表示身份、职位或角色。
例如，“He works as a teacher.”（他是一名教师），“She acts as a guide for tourists.”（她担任游客导游）。
这种用法中，AS可被理解为“做为”或“充当”。
三、表示功能或目的AS也常被用来表示某物的功能或目的。
比如，“I use my phone as an alarm clock.”（我把手机当作闹钟使用），这里AS指明了手机在该句中扮演了闹钟的功能。
另外，“She used her coat as a blanket to keep warm.”（她把大衣当作毯子盖着保暖），也是一个很常见的例子。
四、比较两种事物相似性另一种常见的用法是使用AS来比较两种事物之间的相似性。
例如，“She looks as beautiful as her mother.”（她看起来像她妈妈一样美丽），在这个句子中，AS用来将“她”和“她妈妈”之间的相似性进行对比。
五、表示时间，程度或方式此外，AS还可用于表示时间、程度或方式。
例如，“I will finish the report as soon as possible.”（我会尽快完成报告），“He did the task as well as he could.”（他尽力完成了任务）。
这些例句中，AS表示了某个行为或状态发生的时间、程度或方式。
六、固定搭配1: AS IF/THOUGH除了AS的基本用法外，AS还与一些特定词汇固定搭配使用。
其中之一是“as if/as though”。
英语中As用法大全
英语As用法大全1、作介词1. He spoke as a teacher. 他作为老师发言&他以老师的身份发言（表“作为”）2. He spoke like a teacher. 他讲话很像是老师3. 表示“当某人是(某身份)时。
例如：As a child, she was sent to three different countries. 她儿时去过3个不同的国家。
4.表示“因某人是(某身份)”，例如：As a gardener, hell take care of all flowers.因作为1个园丁，他将会照顾所有的花朵。
5.表示“作为，当作”，例如：I found a job as a teacher. 我找了1份教师的工作。
(take sb. as/treat sb. as...)6.be famous as=be known as表“以..身份而著名”，注意与be famous for=be known for表“因..而闻名“的区别He is known as a successful lawyer.Qingdao is known for its beautiful summer.2、用于固定词组1.as/so long as表“只要”As long as we dont lose heart,well find a way to overe the difficulty.只要我们不灰心，我们就能找到克服困难的办法。
Ill never forget that as long as I am living.这事我至死也不会忘记。
备注：Keep it as long as you like.你能把它保留多久，就保留多久。
（还可作“...之久“）2.so/as far as表“据…, 就… ”As far as I know, he will be away for three months.据我所知, 他将离开3个月。
as的常见用法
as的常见用法在英语中，as是一个非常常见的单词，它有着多种不同的用法。
本文将介绍as的常见用法，帮助读者更好地理解和使用这个单词。
一、作为副词as作为副词，可以表示两个动作同时发生或同时存在。
例如：1. They watched the football game and drank beer as they laughed and talked.他们一边笑着聊天，一边看足球比赛和喝啤酒。
2. The sun rose slowly as the sky turned from dark to light.随着天空从黑暗变到明亮，太阳慢慢升起。
此外，as还可以表示“随着”，例如：3. As she grew older, she became more outgoing.随着年龄的增长，她变得越来越外向。
二、作为连词as作为连词，可以表示两个动作相继发生或两个事件同时发生。
例如：4. As she walked down the street, she noticed a store with the window display of a new dress.当她沿着街道走时，她注意到一家商店橱窗里展示着一件新裙子。
5. We waited for the rain to stop before we continued with our work, as it was still raining when we started.我们等待雨停后再继续工作，因为我们在开始工作的时候还在下雨。
此外，as还可以表示“因为”，例如：6. As he was feeling unwell, he stayed at home and rested.因为他感觉不舒服，所以他待在家里休息。
三、作为介词as作为介词，可以表示“作为”或“与…相比”。
例如：7. She works as a teacher and enjoys her job.她作为一名教师工作，并喜欢她的工作。
as的用法总结
as的用法总结大家在英语学习的时候经常会对as的用法感到疑惑，下面小编给大家对as的用法做了总结，希望可以帮助到大家！as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)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。
2、as引导时间状语从句此时，as译作“当……时候”，可以放在主句之前，也可以放在主句之后。
例如：He smiled as he said goodbye to me.他向我道别时微笑了一下。
As she was walking in the park,she heard a girl singing.她在公园里散步时，听到一位女孩在唱歌。
I sang an English song as I went along the river.我边沿河边走边唱英文歌。
3.as用作连词引导原因状语从句as，because，since都可以表示因果关系，连接原因状语从句，含义是"因为，由于"，但它们有区别：because表示的语气最强;as一般放在句首，语气较弱，较口语化;since常常用在书面语中，表示多为对方已知的、或稍加分析便可得知的原因，有时可译作"既然"。
as的用法总结
千里之行，始于足下。
as的用法总结as 是一个多功能的词语，在不同的语境中可以有不同的用法。
下面是 as 的一些常见用法和解释。
1. 作为一个连词（conj.），as 可以引导一个从句或条件从句，并且在从句中起到比较的作用。
例如：- She is as tall as her sister.（她和她妹妹一样高）- I did the job as he told me to.（我按他说的做了那份工作）2. 作为介词（prep.），as 可以表示以下几个意思：- 作为，当做，像：He works as a doctor.（他以医生的身份工作） - 按照，依照：Do as I say.（按照我说的做）- 随着，伴随着：As we grow older, we gain more experience.（随着年龄增长，我们获得更多经验）- 如同，像：He ran as fast as a cheetah.（他跑得像猎豹一样快）3. 作为副词（adv.），as 的用法较为多样：- 同样地，一样地：He treated us all as equals.（他对待我们都一视同仁）- 更加，越来越（用于比较级）：He is getting better as time goes on.（随着时间的推移，他变得越来越好）- 当时，同时：The robbers entered as the bank was closing.（劫匪们在银行关门的时候进入了）- 怎样，如何：I don't know as yet.（我还不知道怎么样）- 以某种方式，像个（用于否定句）：He's not as smart as he thinks.（他没有他自以为的那么聪明）第1页/共2页锲而不舍，金石可镂。
4. 作为连词（conj.），as 还可以引导一些固定的短语和习惯用语：- as well as：除...之外，还有：I speak English as well as French.（除了英语，我还会说法语）- as if/though：好像，仿佛：He looked at me as if he had seen a ghost.（他看着我，好像见了鬼一样）- as long as：只要，既然：You can come in as long as you take off your shoes.（只要你脱鞋，就可以进来）5. As 还有一些其他的用法：- 在某种角色或身份下，在某种属性或状态下：She works as a teacher.（她以教师的身份工作）- 用于比较（用于比较级和最高级）：This book is twice as expensive as the other one.（这本书比另外一本贵一倍）- 作为连续的时间或空间标志：he arrived at 10am as arranged.（他按约定在上午10点到达）总结起来，as 是一个多功能的词语，可以作为连词、介词、副词和连词等多种用法。
as的句型和用法
as的句型和用法as是一个多功能的词，它可以作为连词、副词、介词、形容词、名词等词性使用。
下面将会详细介绍它的句型和用法。
1. 作为连词（conjunction）：1.1 表示原因：as可以引导原因状语从句，说明事件的原因，“由于”，“因为”。
例如：- As it was raining, we decided to stay at home.（由于下雨，我们决定待在家里。
）- He didn't go to the party as he was feeling sick.（由于他感到不舒服，他没有去参加派对。
）1.2 表示方式：as可以引导方式状语从句，表示某个行为或状态的方式，“如同”，“像”。
例如：- He worked as if he had never been tired.（他工作得好像从未疲倦过一样。
）- She spoke to me as though I were a child.（她对我说话的态度像对一个小孩子一样。
）1.3 表示时间：as可以引导时间状语从句，表示某个动作发生的时间，“当...时候”，“一边...一边”。
例如：- 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。
）- As he was talking, I was listening attentively.（他一边说话，我一边专心听着。
）2. 作为副词（adverb）：2.1 表示程度：as可以用来修饰形容词或副词，表示程度，“同样地”，“一样”。
例如：- She is not as tall as her sister.（她不如她姐姐高。
）- He sings as beautifully as a professional.（他唱得像一个职业歌手一样动听。
）2.2 表示比较：as可以用来比较两个事物或人，“像...一样”，“如同”。
as的用法总结(简明版)
as的用法总结(简明版)
`as`是一个多功能的词汇，在不同的语境中有不同的用法。
下面是`as`的几种常见用法的简明总结：
1. 表示身份、角色、职位
例子：
- She works as a teacher. (她是一名教师。
)
- He began his career as a lawyer. (他以律师的身份开始了他的职业生涯。
)
2. 表示方式、方式、方法
例子：
- I will do it as you told me. (我会按照你告诉我的方式来做。
)
3. 表示原因、理由
例子：
- As it was raining, we decided to stay indoors. (由于下雨，我们决定呆在室内。
)
- He couldn't attend the meeting as he was ill. (他因为生病无法参加会议。
)
4. 表示时间、顺序
例子：
- I met her as I was leaving the office. (当我离开办公室时，我遇到了她。
)
5. 表示类似、比较
例子：
- He is as tall as his brother. (他和他的兄弟一样高。
)
- The new phone is as expensive as the old one. (这部新手机和旧的一样贵。
)
请注意，以上只是`as`的一些常见用法，实际应用中可能有更多的变化和衍生用法。
as的用法归纳
as的用法归纳
“as”是一个英语连词，具有多种用法。
以下是“as”的用法归纳：
1、引导时间状语从句：as表示“当……时候”，“随着……”，“一经……就……”，强调主句和从句中的动作或状态同时发生或进行。
例句：As time goes by, I grow more and more confident. 随着时间的推移，我变得越来越自信。
2、引导原因状语从句：as表示“因为”，与because相比，语气较轻。
例句：As it was getting dark, we decided to stay in the hotel. 因为天色渐渐暗了，我们决定在旅馆里待着。
3、引导方式状语从句：as表示“以……方式”，“像……一样”。
例句：She looks at the world as if she were the only person in the world. 她看待世界的方式就像她是世界上唯一的人一样。
4、引导让步状语从句：as表示“尽管”，“虽然”。
例句：Young as he is, he knows a lot. 尽管他很年轻，但他知道很多事情。
5、引导比较状语从句：as表示“与……一样”，“像……一样”。
例句：He is as tall as his father. 他和他父亲一样高。
6、作为介词：as还可以作为介词，表示“作为”，“以……身份”。
例句：He works as a teacher. 他作为一名教师工作。
综上所述，“as”是一个非常灵活的连词，具有多种用法。
掌握其用法可以更准确地表达思想和意义。
as的六种用法
as的六种用法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，表示“和／与．．．(不)一样”。
如：Jack is as tall as his father．杰克和他的父亲一样高；He doesn't speak English as／so fluently as you．他的英语说得不如你流利。
as作介词。
1、作“如，像”解。
They got united as one man．他们团结得像一个人一样。
2、作“充当，作为”解。
As a writer，he was famous．作为作家，他是很有名的。
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。
He shouted aloud as her ran along．他一边往前跑，一边高声地呼喊。
as作连词，相当于when。
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。
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：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)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。
as的6种用法总结及典型句子
千里之行，始于足下。
as的6种用法总结及典型句子1. 作为关系代词：a. He works as a teacher.（他担任一名教师。
）b. I recognized him as the person in the photograph.（我认出他是照片中的那个人。
）2. 作为副词，表示程度或方式：a. She tried as hard as she could.（她极尽全力。
）b. I will do it as soon as possible.（我会尽快完成。
）3. 作为连词，表示原因或目的：a. I didn't go to the party as I had other plans.（我没有去参加派对，因为我有其他安排。
）b. She went to the store as she needed to buy groceries.（她去了商店，因为她需要买食品。
）4. 作为介词，表示像、作为或属于的关系：a. He was dressed as a clown for the costume party.（他参加化装舞会时穿着小丑的服装。
）b. He works as a doctor in a hospital.（他在一家医院工作，是一名医生。
）5. 作为连接代词，引导从句：a. I will do as you say.（我会按照你说的做。
）b. As I was leaving, I saw him.（正当我离开的时候，我看到了他。
）6. 作为感叹词，表示惊讶或吃惊的情绪：第1页/共2页锲而不舍，金石可镂。
a. As! I can't believe I won the lottery!（哇！我真不敢相信我中了彩票！）b. As, how did you do that?（天哪，你是怎么做到的？）。
as的用法归纳
as的用法归纳as一词看似很简单，但词性多，词义广，用法灵活，不易掌握，而且在高中阶段出现频率也很高，因此系统地掌握该词对英语的学习大有益处。
现将其用法归纳如下：一、as作介词的用法1．表示“好像（某人）”，例如：The actor was dressed as a poli-ceman.这个演员化妆成一名警察。
2．表示“有（某人）的身份或特征；作为，当作”，例如：I'm speaking as your employer.我以雇主的身份和你说话。
3．表示“因某人是（某身份）”，例如：As his private secretary，she has access to all his correspondence.由于是他的私人秘书，她能接触到他所有的信件。
4．表示“当某人是（某身份）时”，例如：As a child，1went ab-road twice.我儿时曾出国两次。
注意：as和like都可以作介词，但意义不同。
as表示“以实际的身份或地位”.like则表示“与…相似，以与…相类似的方式”例如：（l）He spoke asa teacher.（2）He spoke likea teacher.句（1）的意思是：“他作为老师发言”或“他以老师的身份发言”，句（2）的意思是：“他讲话很像是老师”。
二、as作副词的用法表示“达到与…相同的程度；与…等同”，例如：He swims fast，but I swim just as fast.She has a lot of books，but I don't have as （so）many.（在否定句中，as可以用so来替代）三、as作关系代词，引导定语从句as作关系代词，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，既可以单独使用，也可以与其他词连用，其用法要比that和which更为复杂，应加以比较和that，which的区别。
as的用法总结及典型句子
千里之行，始于足下。
as的用法总结及典型句子as 是一个多功能的词语，可以作为副词、连词、介词和名词使用。
下面是as 的不同用法和典型句子的总结：As 作为副词：1. 表示程度或方式：- He ran as fast as he could.（他尽可能地快速跑）- She sang as beautifully as an angel.（她唱得像天使一样动听） - I'm as tired as a dog after a long day.（我一整天后很累）2. 表示顺序或顺便：- She cooked dinner as she listened to music.（她一边做晚饭一边听音乐）- As you go to the store, can you pick up some milk?（你去商店的时候能带点牛奶回来吗？）3. 表示比较：- He is as tall as his brother.（他和他兄弟一样高）- The new house is twice as big as the old one.（新房子比旧房子大两倍）As 作为连词：1. 表示原因或理由：- I couldn't attend the party as I had to work.（我没有参加聚会因为我得工作）- You should wear warm clothes as it's cold outside.（外面冷，你应该穿暖和的衣服）第1页/共3页锲而不舍，金石可镂。
2. 表示时间顺序：- I will finish the report as soon as possible.（我会尽快完成报告）- As I walked into the room, I noticed a strange smell.（当我走进房间时，我闻到一股奇怪的气味）3. 表示比较：- He is as tall as his brother, as clever as his sister, and as kind as his mother.（他和他的兄弟一样高，和他的姐姐一样聪明，和他的妈妈一样善良）As 作为介词：1. 表示身份或角色：- He works as a teacher in a local school.（他在一所当地的学校里担任教师）- I will introduce you to my friend as John's cousin.（我会把你介绍给我朋友，告诉他你是约翰的堂兄弟）2. 表示方式或手段：- She painted the picture as a gift for her parents.（她把这幅画作为给父母的礼物画的）- He fixed the problem as best as he could.（他尽力解决了这个问题）As 作为名词：1. 表示作为一个整体或一个单元：- I like fish, but I don't eat it as often as I used to.（我喜欢吃鱼，但我现在不像以前那样经常吃了）千里之行，始于足下。
As的用法大全
As的用法大全As的用法小结（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, she gave a loud cry.4)接名词表示某一个年龄段时.如:As a young man, he was active in sports.As a little boy (When he was a little boy) he began to learn to play the piano.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 2 hours.I was wandering through the street when I caught sight of a tailor’s shop 有意料之外的意思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如:Work while you work. Play while you play.Strike while the iron is hot趁着2. As =Since 作"既然"、"由于"解,常用来表示已为人们所知或显而易见的原因或理由。
as的七种用法
as的七种用法【释义】asadv.（程度或数量上）同样，一样；例如，诸如conj.像……一样；（说明某事应完成的时间或发生的频率）；照……方式，和……一样；正如，如同；当……时候，在……时候；虽然，尽管；因为，由于；（关系）就像，相当于；以至于（与so或such 连用表结果）prep.（被看）作……，（被描绘）为……；作为，当【短语】1Queer As Folk同志亦凡人;同志亦常人;同志常人2as for至于;关于;就;就……方面说3as well同样;也;还是……为好;一样4as a result因此;结果是;作为结果5as if好像;似乎;仿佛;仿怫6such as例如;诸如;比如;像7As Good As It Gets尽善尽美;猫屎先生;爱在心头口难开;人生就是这样8as a rule通常;规章;照例;通常来说9As long as只要;如果;既然;长达【例句】1Her skin was as smooth as silk.她的皮肤像丝绸一样光滑。
2You're as tall as your father.你和你父亲一样高。
3He's nearly as tall as you are.他差不多和你一样高了。
4It's not as hard as I thought.这没有我想象的那么困难。
5I felt as pleased as anything.我感到无比高兴。
6His career is as good as over.他的事业差不多要完了。
7This isn't as bad as I thought.这没我原来所想的那么差。
英语语法15之as的用法
举例：So long as you are innocent,fear nothing. His views must carry some weight in so far as they are based on
He practically became allergic to the money,as he grew richer and older. [注]as和连词when,while的用法区别。 ①as引导的是一个持续性的动作，所表示的“同时发生”的意义比when更 明显些，往往主句的动作发生时，从句的动作正在进行。 举例：We held hands as we walked.
We ought to try to see things as they are. ③“过去分词+as it is”结构：加强分词的作用，表示退让或暂时承认。 举例：Translated as it is into good chinese,the novel os worth reading. ④as it were(虚拟语气，作插入语用，可用于任何时态的句子中，it无特 殊意义)“似乎，好像，可以说是”。 举例：This book gives,as it were,a vivid picture of our city.
We must study so long as we are alive. As often as he came,he stayed with us.
一、as用作从属连词
（一）引导多种状语从句
2.原因状语从句 ①as“由于，因为”—引导的原因状语从句表示的是明显的原因，是既成 的事实。放在主句的前面，多用于日常谈话中。 举例：As you are tired,you had better rest. ②as引导的原因状语从句，为了强调语气，可将表语移到句首。 举例：Young as he was,he was not equal to the task.
as 的用法归纳
as 的用法归纳关键信息项：1、 as 用作连词的用法引导时间状语从句引导原因状语从句引导方式状语从句引导比较状语从句引导让步状语从句2、 as 用作介词的用法表示“作为”表示“如同”3、 as 用作关系代词的用法引导限制性定语从句引导非限制性定语从句4、 as 构成的常见短语as soon asas long asas well assuch as11 as 用作连词111 引导时间状语从句as 引导时间状语从句时，表示“当……的时候；一边……一边……；随着……”。
例如：As she grew older, she became more beautiful （随着她年龄的增长，她变得更漂亮了。
）He sang as he walked （他边走边唱。
）112 引导原因状语从句as 引导原因状语从句时，表示“因为；由于”，语气较 because 弱。
例如：As it was raining hard, we stayed at home （因为雨下得很大，我们待在家里。
）113 引导方式状语从句as 引导方式状语从句时，表示“按照；如同”。
例如：You must do as I tell you （你必须按照我告诉你的去做。
）114 引导比较状语从句asas 表示“和……一样……”，否定形式为 not as/soas 表示“不如……”。
例如：He is as tall as his brother （他和他哥哥一样高。
）This book is not as interesting as that one （这本书不如那本有趣。
）115 引导让步状语从句as 引导让步状语从句时，句子要倒装。
形容词、副词、名词（不带冠词）＋ as ＋主语＋谓语。
例如：Young as he is, he knows a lot （尽管他年轻，但他知道很多。
）12 as 用作介词121 表示“作为”as 用作介词表示“作为”时，后接表示身份、职业等的名词。
as的用法总结
as的用法总结as是英语考试中用得比较多的一个词，也是很多学生反映较难掌握的一个词。
as的词性较多，用法也较复杂，因此掌握该词会对英语学习很有帮助。
下面笔者就对as的用法作一个简单的归纳。
一、as作为从属连词，可以引导下列从句：1、as引导时间状语从句，意为“正当……的时候”、“一面……一面……”、“随着……”，从句可放主句之前或主句之后。
As I was coming here，I met your brother.As he walked on，he felt himself getting more and more tired。
【知识拓展】：as与when, while都是引导时间状语从句的从属连词，含义都是"当……的时候”。
但它们有区别:用when时,从句的动作可以与主句的动作同时发生，也可以先于主句的动作发生；用while 时,从句的动作为一过程，主句动作与从句动作同时进行或在从句动作过程中发生;用as时，主句和从句的动作同时发生，具有延续的含义。
例如：It was snowing when he arrived at the construction site。
他到达工地时，天正在下雪。
He was watching TV while his mother was cooking。
他母亲做饭时他在看电视.You will grow wiser as you grow older.你会随着年龄的增长而越来越聪明。
2、as引导原因状语从句,意为“由于”大多位于主句之前，偶尔在前或后。
As this question is of great importance，we will discuss it once again。
Water, as it occurs in nature, is never very pure.We couldn‘t send the children to school as life was very hard in those days.【知识拓展】:as，because，since都可以表示因果关系,连接原因状语从句，含义是“因为，由于”，但它们有区别：because表示的语气最强；as一般放在句首，语气较弱，较口语化；since常常用在书面语中，表示多为对方已知的、或稍加分析便可得知的原因，有时可译作“既然”。
as 的用法总结
as用法大全
一、As 用作关系代词1. As 单独用作关系代词。
As 单独用作关系代词时，常用于引导非限制性定语从句，代表主句所表达的概念或主句中某个词所表达的概念。
且 As 引导的从句在句中的位置较为灵活，可位于主句之后，也可位于主句之前，有时还可插入主句当中。
As 在从句中可充当主语、宾语或表语。
例如：This elephant is like a snake, as anybody can see.As we all know, he is good at English.As is known to all, he is a famous writer.John, as you know, writes plays.2. As 与其它词搭配用作关系代词。
As 常与 the same, such, so, as 等搭配, 构成 the same...as, such...as, so...as, as...as 等句型，引导限制性定语从句。
例如：I have the same idea as you (have).Such men as he (is) are rare.They do the same work as I (do).Here is so big a stone as no man can lift.••••注 1：As 从句中的 be, do, have 等动词常省略, •但如果主句与从句中的动词时态不同或两个动词的形式不同, 这类词就不宜省略。
例如：They are doing the same work as I did last year.They do the same work as she does.••••注 2：在 the same...as 结构中, same 有两层意思：一是特指的同一个，即前面提到的那一个，而非另一个，其二是指与另一物在某个方面（如外形、性质、内容或数量等）一样，或没有区别，或与过去比没有变化。
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as 用法总结连词：1.正如……引导非限制性定语从句，放句首As is said/known/ reported/believed/told, ……..As is often the case,…..这是常有的事As the saying goes, no pains, no gains.as expected/supposed than expected/supposed as usual than usualsuch…..that …..cf: such…..as……such/so…..that….引导结果状语从句如此…..以致于such/so…..as …...引导定语从句，as为六代之一，充当成分e.g. It is such a heavy box that we can’t lift it.It is such a heavy box as we can’t lift.Such a heavy box is it that we can’t lift it.the same + n. that 同一物（定语从句）the same + n. as 相似物（定语从句）I am wearing the same cap as you did yesterday.今天我戴了一顶和你昨天戴的一样的帽子。
e.g. I don’t like playing basketball, but my brother likes. 错误like 是vt，后面必须加宾语，but my brother likes playing basketball.改为：but my brother does. 助动词相当于一个动词词组2. 正如，依照，按照……I will do as you advised. 我会照您的建议去做。
She stayed in bed as the doctor had ordered.她依照医生的吩咐卧床休息。
Leave it as it is. 把它维持原样。
cf：what“那个样”Alice isn’t what she was.Alice is 3 times what she was 6 years ago.3. 尽管（as 须倒装，though 可倒装，although 不可倒装）方法：将表语提前，名词前去冠词Boy as/though he is，he knows a lot.尽管while in spite of = despitee.g. While he is of much wealth, he is not happy.( of much wealth富有的)while 用法1.并列连词，而，然而cf：but 然而，但是，表转折e.g.I was reading in the sitting room, while my brother was playing agame in his bedroom.2.当…….的时候while + 进行时cf when + 点动作cf as 一边……一边，同时e.g. While they were talking about me, I pushed in. （考：while + V-ing）When I pushed in, they were talking about me.3. while 尽管（考：选择while）4. 随着……, 一边…..一边，同时，持续性动词As time goes on/by, ……随着时间的推移，（goes 是谓语，需要as 连词）With time going on/by,…随着时间的推移，（going是非谓语，需要with介词）选择题：①题目中出现goes 或going，考as或with②题目中出现as 或with，考goes或going，常考with + 宾语+ goingHe sang songs as he was taking a bath. 他一面洗澡，一面唱歌。
He was watching TV in the sitting room while I was playing games in my bedroom.5. as正因为（强有力，唯一的理由）e.g. He won the first prize in the competition, as he worked so hard for it. because 普通的因果关系now that= since 既然e.g. Now that everybody is here, let’s begin our meeting.for 表示猜测.e.g. It rained last night, for the ground is wet now.介词：1. 作为work as/ serve as/ act as 充当，充任act as a leading role/part in the film扮演主角play a leading part/role in doing sth 在做某事过程中起主导作用cf: work for 为……效力，工作be used to doing= be accustomed to doing sth 习惯于be used to do/as/for 被用来做，被用作为，被用于used to do =would do 过去常常做（used to 实义动词或助动词）e.g. There used to be a wasteland here, didn’t there?或usedn’t there?cf: used to doing 是be used to doing 的非谓语形式“习惯于……的”used to do 是be used to do 的非谓语形式“被用来做……的”选择题：方法：判断是否非谓语，主动还是被动，要做正在做还是做完了2. treat / look on / think of/ count/ regard/……sb as 把…..当作consider sb (as/to be) 认为某人是，把…..当作cf：consider sb to do 认为某人要做某事consider one’s doing= think of one’s doing考虑某人做某事consideration 考虑under consideration 在考虑中under way 在进行中under repair 在修理中With my bike being repaired/ under repair，would you be so kind to lend me yours?under construction 在建造中under attack 遭受攻击under discussion 在讨论中considerate adj = thoughtful 考虑周到的，体贴的副词：as ……as 和……一样not as/so ……asHe is as honest a boy as me.He is not as/so honest a boy as me.（说明：第一个as/so是副词，第二个as为介词或连词）This building is as tall as that one.This building is twice as tall as that one.It is twice as tall a building as that one.He is older than me .He is much older than me.He is twenty-four years older than me.He is twice older than me.It is a building.It is a tall building.It is as tall as that building.It is as tall a building as that one.It is twice as tall a building( as that one).考试时考：1.twice as tall a building as2.twice as tall a building.(后面省略)such a good boy= so good a boyI feel so upset for(介词) my not being as gifted in English as you (are).be gifted/talented in 在某方面有天赋倍数关系：36与12的关系：36=3*12（①12即as old as me②我的年龄the age of me）1.three times as old as me (=three times as old a boy as me)2.twice older than me (36-12)/12=23.three times the age of me4.three times that of me (that/those指代比较对象)5.three times what she was 6 years ago.其它词组搭配：as long as只要/so long asas far as远至As far as I’m concerned,…=From my point of view,=In my opinion,=As for me, as soon as possible=as soon as sb can尽快离动作发生的时间短e.g. He spent as much time as he could working hard.他花尽可能多的时间努力学习。
as fast as possible 对象移动的快as quickly as possible 动作发生的快as well as 也，和= together with = along with=with 就前原则，考谓语单数as if= as though似乎，好像cf：even if = even though 即使as for/to me 对我来说How soon……?表示离动作发生还有多久（瞬间动词）I will get there in 2 days. How long……?表示动作持续了多久（持续性动词）I will stay there for 2 days. How often……?(表示怎么个经常法)提问频率。