请问这个句子为什么是过去分词呢?谢谢

问题描述:

请问这个句子为什么是过去分词呢?谢谢
Helps arrive for snow buried/burying upstate New York.

snow buried up state=state (that was )buried up by snow.
过去分词表示被动.upstate�����DZ����ģ�����up state��ԭ�䷭���ҿ�����snow buried upstate New York=upstate New York that was buried�����ǹ�ȥ�ִʾ��б����ĺ��塣����buried�Ƕ�������ŦԼ������лл�ǵġ�