as...as的用法

1. as adv./adj. as
       Taipei isn't as beautiful as Hualien.

2. as [many, few] count noun as
       Hualien hasn't as many cars as Taipei.
       Taipei hasn't as few cars as Hualien.

3. as [much, little] noncount noun as
       Hualien hasn't as much pollution as Taipei.
       Taipei hasn't as little pollution as Hualien.