It is best to travel with someone who can translate things for you.先行词是否是someone ,为什么用wh为什么语法书上说,当先行词是不定代词时,关系词只用that.

It is best to travel with someone who can translate things for you.先行词是否是someone ,为什么用wh为什么语法书上说,当先行词是不定代词时,关系词只用that.
It is best to travel with someone who can translate things for you.先行词是否是someone ,为什么用wh
为什么语法书上说,当先行词是不定代词时,关系词只用that.

It is best to travel with someone who can translate things for you.先行词是否是someone ,为什么用wh为什么语法书上说,当先行词是不定代词时,关系词只用that.
that既可代表事物也可代表人,which代表事物,who代表人；
当先行词是物的时候,可以用that和which,但是先行词是anything,everything,nothing ,none等不定代词时,只能用that；
当先行词是人的时候,可以用who和that,因此这句话中,先行词是someone是“某人”,因此who和that都可以.

是someone,someone表示人，所以用who 啊

屁。吃饱了撑的啊！