形容词(adj.)一般用来修饰名词、代词;副词(adv.)一般用来修饰动词。比如作形容词的:1.the best film of the yearthe best solutionthe best time for plantingwore his best suit2.the White House thought it best not to respond做副词的:1.he played best after a couple of martinis2.you'd best stay at home你看它带所有格的时候基本就可以确定是形容词了