修饰名词的就是定语，修饰动词或形容词的就是状语。如：The reason for his being late was that he missed the bus.他迟到的原因是没赶上公共汽车。（for his being late修饰reason，是定语。）Could you buy a towel for me?你可以给我买一条毛巾吗？（for me修饰动词buy，是状语。）
