as...as possible中间什么情况用副词,什么情况用形容词

中间用什么词主要看它所修饰的什么词,如果是动词的话就用副词,如果是名词、系动词、be动词等就用形容词.
比如 I will do it as well as possible.(adv.)
I wil phone you as soon as possible.
I will design the shirt as beautiful as possible.（adj.）
这个词组还可以与as...as one can 转换