定语是来修饰名词或代词的,状语是来修饰动词,形容词,副词和整个句子的。如 he is a tall boy. 这句中tall作定语修饰后面的名词 he go to school on foot这句中. on foot作状语修饰谓语动词 there is a book in the bag. in the bag作地点状语 the boy standing at the door is my brother. standing at the door作定语修饰前面的名词 I have something important to tell you. important作定语修饰前面的代词。
定语是修饰限制名词代词的成分,状语是说明动作的时间,方式,原因,频度等的成分。 例如:That is the company I work in.中I work in说明的是名词company,是定语。 I always go to the park.中 always 说明的是go这个动词的频度,是状语。