1、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.