careful和carefully的词性有什么区别,分别怎么用

前者形容词，修饰名词。一般在名词前，be动词后。
e.g.:You should be careful.
The doctor gave him a careful examination.（此例句选自谷歌字典）

后者副词，修饰动词和形容词。(但carefully好像一般不修饰形容词~)
e.g.:Now listen carefully everybody.（此例句选自谷歌字典)

Hope it helped you.

careful形容词，修饰名词

例如：
You should be more careful with your money.
你花钱要慎重一些。

carefully副词，修饰动词

例如 Here, we must think carefully.
在这个问题上，我们必须仔细思考

前者形容词后者副词。前者修饰名词，后者修饰动词