为什么先行词为all,everything,anything,nothing,no等不定代词时不能用which 用tha

为什么先行词为all,everything,anything,nothing,no等不定代词时不能用which 用tha 关于定语从句的问题当先行词为everything,all,little,much等不定代词时；先行词被all,every 定语从句,只用that不用which的情况中,当先行词是不定代词或者被不定代词修饰时,用that,不用which.这些不 定语从句当先行词为不定代词时,关系代词只能用that,可我在语法书中看到如果先行词为something也可以用which listen之后加不定代词：nothing,everything,anything等时要加to吗? 不定代词的语法,详解something,anything,everything,nothing 定语从句中为什么先行词为不定代词时引导词必须用that everything,something,anything,nothing,everybody这些不定代词作主语时,反义 二、用方框中所给的不定代词填空.everything something nothing anything anyone 先行词nothing something 不定代词or little much修饰或被all every few any 关于不定代词（something,anything,nothing等） 不定代词为先行词时,可以用who作关系代词吗?