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as英语用法归纳

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as英语用法归纳

  下面是小编归纳的一些关于as英语用法, 希望对大家的英语学习有帮助。

  一)as作介词。

  1.作“如,像”解。eg:

  They got united as one man.他们团结得像一个人一样。

  2.as作“充当,作为”解。eg:

  As a writer,he was famous.作为作家,他是很有名的。

  二)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,作“和/与...(不)一样”解。eg:

  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。

  三)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。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。

  2.引导原因状语从句,作“因为,由于”解,与because的用法相近。eg;

  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eg:

  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)

  When at Rome,do as Romans do.入乡随俗。(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。eg;

  Strange as it may seem,it is true.尽管这事看上去很奇怪,但却是真的。

  Try as he might,Tom could not get out of the difficulties.不管怎样努力,汤姆还是摆脱不了困境。

  四)as作关系代词。

  1.引导限制性定语从句,用在“such...as”,“the same...as”,“as...as”等结构中,常译作“像...一样的人(或物)”,“凡是...的人(或物)”。例eg:

  He wished to be such a man as Lei Feng was.他曾希望做一个像雷锋那样的人。

  My hometown is no longer the same as it was.我的家乡再也不像过去一样了。

  2.引导非限制性定语从句,用来指代它前面的整个句子(即先行句),意思是“这一点”。这个分句可以位于句首、句中或句末。eg:

  As is well known,oceans cover more than 70% of the earth.我们知道,海洋占地球面积的百分之七十以上。

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