非谓语动词省略句的用法.doc

非谓语动词省略句的用法 1、We all know that, ,the situation will get worse. A. not if dealt carefully with B. if not carefully dealt with C if dealt not carefully with D. not if carefully dealt with 选 B，可改成 if it is not carefully dealt with, 在 if, while, when, unless 等连词引导的从句中，如果主句的主语和从句的主语 一致，那么从句的主语可以省略，从句谓语动词发生变化，主语与谓语是主动 关系，谓语改成 ing 形式，是被动关系改成 ed 形式 2、People are often killed while ___ the road. A. cross B. crossing C. to cross D. crossed 答：选B该题补充完整就是 “People are often killed while they are crossing”, they指的就是People, 因此可以省略主语和be动词。

解析：由while引导的状语从句，可省略主语和助动词be, 保留ing分词、ed分词或 表语这样省略的条件是：●从句中被省略的主语必须与主句的主语一致；●谓语动 词必须含有be；●从句必须与主语和be动词一起省去，不可只省略主语而保留整个谓 语，也不可只保留主语而省略谓语一、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/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 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有as...as结构的常见短语归纳： 2. as用作连词引导时间状语从句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：(1)It was snowing when he arrived at the construction site.他到达 工地时，天正在下雪2)He was watching TV while his mother was cooking.他母亲做饭时他 在看电视3) You will grow wiser as you grow older.你会随着年龄的增长而越 来越聪明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“例如：(1) He will succeed because he is in earnest.他一定会成功，因为他 很认真2) Since you are so sure of it he”ll believe you.既然你对此如此 有把握，他会相信你的3) As rain has fallen, the air is cooler.因为下过雨，空气比较清 爽。

4. as作连词引导让步状语从句as与although (或though)，however (或no matter how)等都可以引导 让步状语从句，含义是“虽然，尽管“，但它们有区别：although语气稍正式些， 可放在句首，也可放在句中，主句中不能再用but，但可以用yet；as所表示 的语气较强，引导的让步状语从句用倒装语序；however引导让步状语从句时， 它的后面可跟形容词或副词，也要用倒装语序例如：(1) Although he is quite old, he still jogs every day.他虽然年纪 相当大，仍然每天慢跑 (2) Strange as it may seem, nobody was injured in the accident.这 次意外虽然显得令人不可思议，却没有人受伤3) However hard he may try, he will not attain his goal.无论他怎 样努力也达不到目标二、as作关系代词的用法关系代词as引导定语从句时，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。

1. as引导定语从句与其他词连用①用于the same...as结构中This is the same book as I read last week.这本书和我上周读的那本 是一样的②用于such...as结构中I don”t like such books as he recommends.我不喜欢他推荐的那些书③用于“so +adj. + a/an + n. (单数) + as “结构中I am not so strong a man as I was.我已经没有从前那么强壮了2. as单独引导定语从句as单独引导定语从句时，先行词可以是一个词，也可以是一个句子或短语 例如：(1) She is late, as is often the case.她迟到了，这是经常的事先 行词是整个主句)(2) To shut your eyes to facts, as many of you do, is foolish.对 事实视而不见--你们好多人都是如此的愚蠢先行词是不定式短语)三、as作介词的用法as作介词，意思是“作为“，“以……身份“例如：He came to China as a tourist five years ago.他五年前以游客的身份 来过中国。

四、as作副词的用法 to the same degree or amount; equally “相同地“，“同样地“例如：They don”t have as many airplanes.他们没有同样多的飞机。