as...as… 两个as后面用什么词性啊?这个语法怎么用?如题 谢谢了

as...as,用于形容词和副词的平级比较,如,像姚明一样高：as tall as Yaoming.像他的成绩一样好．as good as his grade.第一个ＡＳ后多用形容词或副词,第二个ＡＳ后是比较的另一个物体 如,Ａ的个头和Ｂ一样高．A is as tall as B.Ａ的成绩和Ｂ的一样好．A's grade is as good as B's.A工作起来和Ｂ一样认真.A works as hard as B.这道题几那道题一样难．This question is as difficult as that one.