先找关键的动词 定语从句:we often think of the days that we spent together on the island. 主句是完整的,而从句是不完整的,需要先行词作为从句中的主语,宾语,状语成分,从句一般是that which where who等引导词后面的句子 宾语从句:He said that he would go to beijing. 宾语从句的主句是不完整的.需要引导词引导的从句充当某一成分 that he would go to beijing.是said的宾语 状语从句:从句在整个句子中做状语,如: My mother was cooking when I arrive home. 当我到家的时候,妈妈正在做饭. when I arrive home.作为一个时间状语,修饰cook,因而叫做状语从句. 主句完整.从句是时间,原因,地点等状语