She runs as faster as her sister does 这句话对吗？

she runs as fast as her sister does.
as...as...中间用动词原形
意思是:她跑得和她姐姐(妹妹)一样快

应该把faster该为fast,as...as中间用形容词原级.
does不能省,does指代runs.例:as 加上形容词再加上 as 的用法, 比方 as tall as "跟什么什么一样高 ", as important as "跟什么什么一样重要 ", as practical as "跟什么什么
一样实用" 等等.

she runs as fast as her sister does.

不对，as...as...中间用动词原形

不对
she runs as fast as her sister does