so...as一般用于否定句和疑問句，而as...as一般用于肯定句。so...as意為只要，用于否定句和疑問句，翻譯成像…般那樣。as...as意為和...一樣，表示同級的比較。使用時要注意第一個as為副詞，第二個as為連詞。

as…as與so...as的區(qū)別有哪些

1、as...as可以用在肯定句中，表示“像...一樣”，后面的形容詞或者副詞要用原級：

She can run as fast as a deer.她能跑的像鹿一樣快。

They work as hard as they do.他們工作像你一樣努力

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.我現在到那里不像過去那么多了。

I didn't do as (so)well as I should.我做的不如我應做的那么好。

3、這種句子中也可以有一個表示程度的狀語：

I don't speak half as (so) well as you.我講得不及你一半好。

She can read twice as fast as he does.她的閱讀速度比他快一倍。

注意：as后面的形容詞如作定語，而被定語修飾的名詞有不定冠詞a時，不定冠詞a須放在形容詞之后。

如：German is as difficult A language as English.德語和英語一樣難學。

這樣的詞序也適合于so...as；

如：I have never seen so beautiful A place as Guilin before.我過去從未去過像桂林這樣美的地方。