the Relative Clause
II. Relative pron. & adv . 关系代词 指人 who(主格)whom(宾格)whose(所有 格)=of whom 指物 which (主、宾格)whose(所有格)=of which
指人或物
that
关系副词 when,where,why The relative adverbs ( where , when , why ) refer to the place, time, and the reason. All the relative adverbs can be replaced by prep.+which. when = on (in, at, during…) + which; where = in (at, on…) + which; _ why = for which. 当先行词是表时间的time, day等,表地点的place, house等,表原 因的reason时，一定要注意分析从句的结构，如果缺少主语或宾语 时，关系词应该用which或that, 缺少时间状语\地点状语\原因状 语时，才能用when、where、why,试比较：
