关系代词有哪些

关系代词主要包括：
- 主格：who, whom, whose, whoever, whomever, whosever
- 宾格：whom, who, whose, whoever, whomever, whosever
- 物主代词：whose, of which, of whom
- 指示代词：which, that, what
- 关系副词：when, where, why, how, wherein, whereby, etc.