there was antoher sister who died

there was antoher sister who died
there was another sister who died
爲什麽用who
there was another sister ,she is died

網友廻答：

there was another sister who died.對的,一個句子衹能有一個謂語（即動詞）；這裡用who定語從句.
there was another sister ,she is died.不對的,was 和is 都是動詞,一個句子不可[kě]以用2個動詞.而且,she is died,這種說法也是錯誤的,死亡是不需要用被動形式的；形容一個人死了用dead,she is dead.
口語中有時也解釋爲某某人死定了.someone is dead.