so...as一般用于否定句和疑问句,而as...as一般用于肯定句。so...as意为只要,用于否定句和疑问句,翻译成像…般那样。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。
1、as...as可以用在肯定句中,表示“像...一样”,后面的形容词或者副词要用原级:
She can run as fast as a deer.她能跑的像鹿一样快。
They work as hard as they do.他们工作像你一样努力
2、在否定句中,as...as和so...as都可以用:
I don't go there as much as I used.我现在到那里不像过去那么多了。
I didn't do as (so)well as I should.我做的不如我应做的那么好。
3、这种句子中也可以有一个表示程度的状语:
I don't speak half as (so) well as you.我讲得不及你一半好。
She can read twice as fast as he does.她的阅读速度比他快一倍。
注意:as后面的形容词如作定语,而被定语修饰的名词有不定冠词a时,不定冠词a须放在形容词之后。
如:German is as difficult A language as English.德语和英语一样难学。
这样的词序也适合于so...as;
如:I have never seen so beautiful A place as Guilin before.我过去从未去过像桂林这样美的地方。