it's raining,raining什么词性.

it's raining,raining什么词性. It is raining now.raining 词性是什么 it's raining,raining什么词性.so I have to stay at home.SO 是副词吗. It's raining here. It's raining. it\'s raining It's Raining...歌词 ______weather!it's raining! unit7 It's raining It's raining _____ outside.填什么? It's raining dogs and it's raining h____ outside