什么时候用关系代词什么时候用关系副词.通俗一点的说~最好举个列子`~

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关系代词有who,whom, that, which, whose,关系副词有where(地点）,when（时间）,why（原因）.
总体来说关系副词在定语从句中做状语
他们和关系代词主要的区别是where,when,why=介词+which
eg:This is the house in which (where) I lived last year.
This is the reason for which (why) he was late for school.
That's the day on which (when) I met him in the street.

关系代词可以作主语
The pleace where he lived is very beautiful.