关于高一的定语从句.1.例句：Young girls like the heroine,whom they can id

1.例句：Young girls like the heroine,whom they can identify themselves with.
这种前有逗号的定语从句,它的用法是什么?特别是它的关系代词的用法.能不能用关系副词呢?
非限定定语从句,补充说明被修饰的短语或词.可以用关系副词.如,
Halloween,when most kids go out for trick-or-treat,his brother stays at home.
2.例句：Boys,for whom guns hold a great interest .
这种句式的定语从句有什么用法?尤其是它的关系代词的用法以及它的同义句.
也是非限定定语从句,补充说明被修饰的短语或词
用WHOM,是因为关系代词是FOR的宾语.如,
Tom,in whom she is interested,will be out of town for a few days.