怎么区分宾语从句 定语从句 状语从句

分别举个例子：宾语从句：i don't know what to do。i don't know which one is the best。象这种有what\which\that引导句子在整个句子充当宾语成分。那就是宾语从句。主语：i 谓语：don't know 宾语：what to do。定语从句：i don't know the man who is wearing a pair of glass。象这中由who,which,that,when 引导的句子在整个句子中做定语成分就叫定语从句。主语：i谓语：don't know宾语：the man定语：who is wearing a pair of glass。修饰the man。状语从句：i don't know she is my english teacher when i see her at first time。我第一眼见到她的时候,不知道她是我的英语老师。象这样以when引导的句子在整个句子中充当状语成分的就是状语从句。主语：i谓语：don;t know宾语：she is my english teacher。状语：when 引导的句子。