not as ...as的用法总结

例句：

Things are not moving as fast as we hoped.

事情的进展不像我们希望的那么快。

Some doubters fear this news may not be as good as it appears.

一些持怀疑态度的人担心这条新闻可能并非像其表面上那样美好。

He's not very friendly, but he's not as black as he's painted.

他不太友善，但也不像别人说的那么坏。