关系代词做宾语，省与不省全靠你;
到此为止，我们一共学了六个关系代词，分别是：which, that, who, whom, whose, as ,这些关系代词在定语从句中可以做主语、宾语、表语和定语，关系代词which/ that/ whom做宾语时，可以省略。
