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关系代词及关系副词一览表语法作用限制性及非限制性限制性人物人及物主语whowhichthat宾语who/whomwhichthat或省that所有关系whosewhose/ofwhich状语when,wherewhy1．限定性定语从句的关系代词指代对象代替人代替物既可以代人也可以代物主格who．thatwhich，that，asthat宾格whom．thatwhich，that，asthat所有格whosewhose2.限制性定语从句的关系副词指代对象先行词关系副词时间表示时间概念的词day，year，date：when地点表示地点概念的词theplace，thedaywhere原因表示原因概念的词thereasonwhy