做宾语的句子叫宾语从句
做定语的句子叫定语从句
首先你要明白什么是 宾语什么是定语
宾语就是谓语后面的成分
定语就是修饰名词的成分.
通常宾语从句的引导词是that(陈述句)what(疑问句)等
而定语从句的引导次几乎都是which 如果后面有介词一般都前置如in which on which
I don't know that you are 18year.
主语 谓语 宾 语
这句中that之后的就是宾语从句,that在从句中做一个宾语一般都省掉不写
The pen which my mather bought with my father.
Which 之后的就是定语从句.修饰PEN!