关于as详细用法.docx

关于英语中出现频率最高的as作为连词，介词，副词详细用法探究如下：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。This film is as interesting as that one.这部电影和那部电影一样有趣。Your pen writes as smoothly as mine.你的钢笔书写起来和我的一样流畅。Run?as?fast as you can.你能跑多快就跑多快。Poets are not so scrupulous?as?you are.诗人并不像你那样顾虑多。Im?as?happy as happy can be.我快乐极了。其否定式为not as/so +adj./ adv. +as。This dictionary is not as/so useful as you think.这本字典不如你想象的那样有用。I never went through a final exam that was as difficult as that one. ?我从来没有碰到过像那次那么难的期末考试。There was no obvious reason why this could not be as good a film as the original. ?找不出明显的理由来解释为什么这部片子拍得不如原先的好。若有修饰成分，如twice, three times, half, a quarter等，则须置于第一个as之前。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 possiblePlease answer my question as soon as possible.请尽快回答我的问题。?You ought to rest as much as possible.你应该尽可能多地休息?(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 asHe 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 asShe cooks as well as her mother does.她烧菜烧得跟她母亲一样好。(6)as little asYou can look forward to a significant cash return by saving from as little as ￡10 a month.?只要每个月存下区区10英镑，你就有希望得到相当可观的现金收益。(7)as ?many asShe gets as many as eight thousand letters a month. ?她一个月里收到的信件多达8,000封。(8)as much +不可数名词+asI havent got as much money as I thought.我带的钱没有我自己想象的那么多。(9)as much asI ate as much as I could.我尽可能得多吃。(10)as early as?I left?as early as?it was consistent with politeness.我在不失礼的情况下提前离去了。I mailed the letter?as early as?Friday.我早在星期五就把信寄了She became a film star as early as 1942. ?她早在1942年就成了电影名星了.一些带有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【2】as用作连词引导时间状语从句s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