前者是形容词,作定语或表语.如：He is a careful boy. He is careful.
后者是副词,作状语,修饰动词或整个句子.He reads the book carefully.
形容词在句中作定语, 表语, 宾语,补语.
She is a good student, and she works hard.
她是一个好学生,她学习努力.
This bike is expensive.
这辆自行车很贵.
I am sorry, I'm busy now.
对不起,我现在很忙.
Have you got everything ready for the meeting?
你为这次会议做好准备吗?
副词是一种用来修饰动词,形容词,全句的词,说明时间,地点,程度,方式等概念. 副词在句中可作状语,表语,短语.
He works hard.
他工作努力.
You speak English quite well.
你英语讲的很好.
Is she in ?
她在家吗?
Let's be out.
让我们出去吧.
Food here is hard to get.
这儿很难弄到食物.
