it is raining heavily,是不是主系表结构,还是主语+不及物动词

it is raining是什么意思? It is raining (heavy). It is raining there.对“raining提问 It is rainy heavil.（改为同义句） It —— —— heavily.（两个空） it is raining,as usual it is raining,as usual It is raining cats and It is raining cats and It is raining now.It_____yesterday. It is raining cats and It is raining _____ outside. 英译汉;It is raining heavily. It is raining ____(hard). it is raining again it was raining again区别 Is it raining today?=()it()today? It is raining.中的谓语是“is”还是“raining”还是“is raining”? 翻译It is raining cats and dogs! it is raining BLANK 怎么翻译? It is raining heavier and heavier是什么意思