as用法總結
一)as作副詞,表示程度,意為“同樣地”。在“as...as...”,“not as...as...”結構中的第一個as是副詞,作“和/與...(不)一樣”解。eg:
Jack is as tall as his father.杰克和他的父親一樣高。
He doesn't speak English as/so fluently as you.他的英語說得不如你流利。
二)as作介詞。
1.作“如,像”解。eg:
They got united as one man.他們團結得像一個人一樣。
2.作“充當,作為”解。eg:
As a writer,he was famous.作為作家,他是很有名的。
三)as作連詞,常用來連接主句和狀語從句。
1.引導時間狀語從句,作“當...的時候”解,有“隨著...”之意,與while意義相近,強調兩個動作同時發生;或某事一發生,另一事立即發生。eg:
He shouted aloud as her ran along.他一邊往前跑,一邊高聲地呼喊。
I was startled as he opened the door.他一開門,我嚇了一跳。
as作連詞,相當于when。eg;
As a little boy (When he was a little boy)he began to learn to play piano.他小時候就開始學彈鋼琴。
2.引導原因狀語從句,作“因為,由于”解,與because的用法相近。eg;
I must stop writing now,as I have rather a lot of work to do.我必須停筆了,因為我還有許多工作要做。
3.引導方式狀語從句或比較狀語從句,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)你們國家一樣,我們在北方種小麥,在南方種大米。(方式狀語從句)
When at Rome,do as Romans do.入鄉隨俗。(方式狀語從句)
4.引導讓步狀語從句,作“雖然,盡管”解。這時從句常用倒裝語序,即把從句中的表語、狀語或動詞原形放在as之前。eg;
Strange as it may seem,it is true.盡管這事看上去很奇怪,但卻是真的。
Try as he might,Tom could not get out of the difficulties.不管怎樣努力,湯姆還是擺脫不了困境。
四)as作關系代詞。
1.引導限制性定語從句,用在“such...as”,“the same...as”,“as...as”等結構中,常譯作“像...一樣的人(或物)”,“凡是...的人(或物)”。例eg:
He wished to be such a man as Lei Feng was.他曾希望做一個像雷鋒那樣的人。
My hometown is no longer the same as it was.我的家鄉再也不像過去一樣了。
2.引導非限制性定語從句,用來指代它前面的整個句子(即先行句),意思是“這一點”。這個分句可以位于句首、句中或句末。eg:
As is well known,oceans cover more than 70% of the earth.我們知道,海洋占地球面積的百分之七十以上。
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