区别：
修饰词不同
副词(adv.)修饰动词
It rains heavily.（副词heavily修饰动词rains）
副词(adv.)修饰形容词
The rain was really heavy.（副词really修饰形容词heavy）
副词修饰副词
It can run quite fast.（副词quite修饰副词fast）
副词修饰句子
Luckily，he came back at last.
形容词(adj.)修饰名词或者代词：举例：
you are very beautiful.
He is a lucky boy.
2.在句中位置不同
副词一般以ly结尾. 副词在句中作状语,一般靠近谓语动词或者在句首或者句末.
举例：
Counselling is being given to those most immediately affected by the tragedy.
目前正在向惨剧的最直接受害者提供辅导服务。
形容词靠近所修饰的名词或代词，作定语。
举例：
Our immediate concern is to help the families of those who died.
我们的当务之急是帮助那些死者的亲属。
扩展资料：
adj句型
1.adjectives+n. 作定语。如：She has a big house.
2.连系动词+adj. 作表语。 常见的连系动词有：be,look,smell,sound,grow,seem,feel,get,taste,turn等，如：He looks angry.
3.用于形式主语和形式宾语的句型：It is +adj. +to do sth / sb find it +adj+to do.
如：It is interesting to learn English.
4.adj.+不定式。如Comics are easy to draw.