如何鉴别英语的定语从句、宾语从句、和状语从句?

老师说从句要用陈述句的意思是语序不要倒装,比如说 I want to know who he is。关系代词和关系副词引导定语从句,所谓定语从句一定是修饰某个主语或者宾语的,这个被修饰的部分就叫做先行词。如：I like the cake which you bought yesterday。which 是关系代词,指代the cake I will go to the factory where you worked。where 是关系副词,在从句中充当地点状语。状语从句和定语从句不同,是修饰动词的。如：I will tell Mary when she comes back。when 引导的时间状语从句。虽然我讲了不少,不过估计你还是不能理解得很透彻,这个要平时用心,另外也要多读句子和文章,培养出预感,就好理解了。补充：宾语从句是名词性从句的一种,分为动词宾语从句和介词宾语从句。前者例如：I wonder when they will arrive。后者例如：I'm looking for what is the most important to me。还有啥不清楚的么?