1、状语从句,是从句的形式做状语,修饰的是主句的谓语动词2、而定语从句,是从句的形式做定语,修饰的是主句中的某个名词、代词3、简单的说,从句修饰主句谓语的是状语从句;从句修饰主句中的名词性成分的,是定语从句.如:I still remember the day when she first came to school.(定语从句,修饰先行词the day)I stopped eating when she came in.(状语从句,修饰stopped)