宾语从句动词后面接宾语,接的是句子就是宾语从句了,如{I know it.it }是宾语,I know what you say .what you say 就是宾语从句、定语从句,此从句就像形容词一样作定语,起修饰成分,如（The book is good.）There is a book that /which is good .that /which is good 就是定语从句状语从句.此从句就像副词一样作状语,起修饰成分,有时间状语从句,地点状语从句如I get up when it's 6:30.when it's 6:30=at 6:30 表示时间的 There is happiness where there is love.where there is love表示地点主语从句 what I teach you are some English grammers what I teach you 在这里作主语成分的,又是一个句子,就是主语从句.总而言之,先看清从句在主句中作什么成分,是宾语就是宾语从句,依次类推.
高一英语从句的讲解宾语从句、定语从句等等各种从句的用法,简单明了一点