it snows sometimes.snow为什么加复数?

It sometimes snows这句话对不对,为什么 这几个词为什么要加s1,It rains sometimes .2,It snows sometimes.3,The s Does it often snow in your city?Yes.It sometimes snows( ) It sometimes( ) here.A.snow B.snowy C.is snow D.snows 跪求结果和原 In Harbin ,it sometimes snows very _____. it always -- （snow）in winter beijing.为什么用snows 而不用snowy? 一)It often snows in winter in my hometown.为什么snows要加S we will go to play with snow if it snows tomorrow.为什么if后用一般现 Does it often ____in winter?A.snows B.snow C in,snows,January,sometimes,it 连词成句set 反义词 同义句转换It sometimes snows in winter here in,snows,January,sometimes,it 连词成句