2018初中英语语法之复合句中as用法详解

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.你的钢笔书写起来和我的一样流畅。

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。

The doctor will see you again next week. Meanwhile, you must rest as much as possible. 医生下周还会给你看病。

在此期间，你一定要尽可能多休息。

(2)as...as usual/beforeShe looks as pretty as before.她看起来和以前一样漂亮。

How is everything going? Pretty much as usual 近来怎么样？和往常一样（注意pretty的用法，这里不是漂亮的意思，而是很的意思，much 在这里不是很多的意思，而是做副词，差不多的意思，不知是否有误。

一、as的用法很多，常见用法如下：1. as可以作副词，连词，也可以引导时间状语从句例如：He looked behind from time to time as he went forward.当他朝前走时，不时地向后看。

2. as可以引导原因状语从句例如：As she has been ill perhaps she'll need some help.她由于生病可能需要些帮助。

3. as引导让步状语从句例如：Angry as he was, he managed to speak calmly.虽然他很生气，但是他讲话很平静。

二、需要注意的是：当as作“虽然”解，引导让步状语从句时，必须将表语、状语或动词原形提到as前面。

句子的倒装语序有以下三种形式：(1). 形容词或副词+as+主语+连系动词be或实义动词。

例如：Rich as he is, he never spends a cent on clothes.虽然他很富有，但他从不花一分钱在衣服上。

Much as I admire his courage, I don’t think he acted wisely.我虽然佩服他的勇气，但我认为他这样做是不聪明的。

(2). 名词+as+主语+连系动词be (注意句首的名词不带冠词)。

例如：Child as he is, he knows a lot.尽管他是个孩子，但懂很多事情。

Boy as he was, he was chosen king.尽管他还是个孩子，但却被立为国王。

(3). 实义动词+as+主语+助动词[如果没有助动词，则要加上一个do(does或did)]。

例如：Try as he may, he never succeeds.尽管他很努力，但总是不成功。

Change your mind as you will, you will gain no additional support.即使你改变主意，你也不会得到另外的支持。

英语语法--as的用法发布日期：2010-1-24 作者：本站一、as充当连词as常常用来引导一个分句，在句子中充当状语，表示时间、比较、理由等。

1．as引导比较状语从句，意为“像……一样”，常用句型为“as（adv．）．．． as（conj．）．．．， not so／as．．．as．．．”。

I'm not so good at drawing as you．我不像你那样擅长画画。

She is as wise as（she is）active．她又活泼又聪明。

注：（1）在比较级前可加一个表示倍数等的状语。

The population of his city is twice as largeas that of mine．（2）可跟一个作状语的结构（副词或介词短语等）。

I saw him as recently as last month．我最近见到他是在上个月。

The number of peoplew ho lost homes reached as many as 250，000．失去家园的人数多达25万。

（3）英语中有很多表示比较的成语。

as black as coalas blind as a batas brave as a lionas brig ht as dayas busy as a beeas cold as iceas easy as ABCas fat as a pigas hot as fireas light as air ／a feather as likeas two peas ／beans as poor as a church mouse as rich as a Jewas sound as a bellas strong as a horseas stupid as a donkeyas sweet as honey ／sugar as whiteas snowas red as blood2．as引导方式状语从句，表示“像……一样”，“按照”。

As的用法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. 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 along．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。

As与When、While的比较作“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 children get older, they become more and more interested in everything.As the sun rose the fog dispersed.太阳一出来,雾随之消失。

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。