as ...as..." 和...一样...",只能用于肯定句中,
not so/as...as...:和...不一样; ...不如.(在否定句中,第一个as 也可用so )
如:I'm not so tall as he is .我不如他高.
Life is not so bad as you are.生活不是像你那样糟糕/坏.
暗指:You are worse than life .