whose 和 of which 有什么区别?

whose 和 of which 有什么区别?
答：whose是从句的连接词。意思：谁的。举例：I don't know whose schoolbag is more beautiful(我不知道谁的书包更漂亮）
of which 意思：其中。举例:of which get me excited is to communicate with other people in english(其中让我兴奋的就是用英语和其他人交流）