形容词只能修饰名词,不能修饰介词和动名词；形容词短语可以作状语,表伴随、方式.
副词可以修饰动词、动名词、形容词、副词、介词短语,但不能修饰介词.有些副词还可以修饰名词,但要后置.
The people here are friendly.Just for fun.He stood there full of terror.
He likes speaking loudly.He studies very well.Quite good.