snowing为什么不双写w

snowing为什么不双写w It's snowing .这里的snowing 是动名词还是进行时?go swimming 要双写W.为什么 It's raining/snowing却不要双写n /w呢为什么go swimming 动名词 而be raining/snowing是进行时呢？ How heavily it is snowing now!中,为什么不能用“heavy”代替“heavily”?为什么?是因为snowing是动名词的关系吗？ It was snowing hard,hard是形容词为什么可以修饰snowing这个动词?hardly不是副词吗？怎么hard也是副词呢？ It's often ( ) in winter here?A .snowy B .snowing 选哪个,为什么? It's snowing in the mountains中mountain为什么要加s look farmers are ____(harvest) cropslook it is____so_____!Asnowing ,heavy B snowing,heavily选哪个为什么 allow过去式allowed为什么不双写w drawing为什么不双写w 加 ing? it`s snowing o____ snowing outside什么意思 It has been snowy for two days为什么不用snowing（5分钟要答案）或说明可不可以用snowy How is the weather in Harbin?A.snow B.snowing C.snowsD.to snow选哪个为什么 It is often ————（snow）in the north of China in winter中填snowing 还是 snowy能不能讲一下为什么?如果没有often，snowing和snowy是不是都可以用？ 1.Today is very cold.It's snowing[snow]2.It's raining[rain]outside.Please take an umberlla with you.这两道题1.snowing或snowy,2.raining或rainy都可以吗?为什么? it is _______(snow) outside. So cold now. 应该填snowy还是snowing?为什么?急求解!老师说应该填snowy,但是我们认为应该填snowing,到底谁对啊? 为什么W=Gh, 为什么W=Gh