其实It is going to rain 和it will be rain 有分别?

其实It is going to rain 和it will be rain 有分别? it is going to rain和it is going to be rainy有何不同 It (is going to/will) rain. it will be raining ,it will rain it's going to rain 哪个对,意思上有 it going to rain还是it我it will rain it's going to rain.=it will rain. [英语]It's going to rain还是It will rain? It's going to rain和 It'll be raining it seems as if it is going to rain中的be going to 可以换成will吗?为什 it must rain 与 it is going to rain 区别 it will rain和it's going to rain的区别 It___that it is going to rain tomorrow