There will be rain tomorrow 里的rain为什么不能改成rainy?

there won't be heavy rain ,Dongdong.there will just be light rain and strong winds there will be ___tomorrow.(rain) 判断对错1 There will be rain tomorrow 2 there will be rainy tomorrow3 i t will rain tomorrow4 it will be rainy tomorrow5 there will be a rain tomorrow 一个 there be ：there will be ________(rain) tomorrow.这里填rain 还是 a rain thanks! It will be rainy.There will be rain.为什么一个是rainy 一个是rain There will be______(rain)tommorw than today.It will be much ______(rain)tommorw. there will be 后面跟什么there will be rain 和there will be rainy哪个对 The radio says there will be much____(rain) tomorrow. will there be heavy rain tomorrow?的回答 The radio says there will be much____(rain) tomorrow. there will be mind and rain in the evening. Maybe there will be a heavy rain变为同义句 there will be a rain能说是there will be rainy吗为什么是a rain呢 There will be rain 为什么将‘There ’改成‘It ’后‘rain ’就要加上‘ing’ 变成It will be rainning there will be rain 还是 there will be a rain ,还是2个都对,为啥?不准确的请别答, There will be rain tomorrow 里的rain为什么不能改成rainy? There will be lots of rain tomorrow同义句There will be lots of rain tomorrow 改为同义句it will be ______ _______ tomorrow You'd better( ) out this afternoon.There will be a heavy rain.A.not to go B.not go C.don't go D.won't go