well 既可用作副词,也可用作形容词.用作形容词时,其用法很有限,只表示“健康的”“恰当的”或“令人满意的”等.
good只用作形容词,不用作副词
be动词后用形容词我现在唱歌和我两年前唱的一样好用英语怎么说？I now sing as good as two years ago不是I'm sing as well now as I was tow years ago 吗as good as用于字面义，表示“与……一样好A as well as B的结构里，语意的重点在 A，不在 B。