I don't know if it _____(rain) tomorrow.这里的时态有什么规律

I don't know _____ it will rain tomorrow.A.if B wether 为什么? 为什么I don't know if it will rain tomorrow I don't know if it will rain tomorrow,If it rains,we won't g 对你可能是小菜一碟,I don't know if it (will rain ) tomorrow.不是说if 引导的 I don't know if it _____ tomorrow,if it ______,I ______ stay 宾语从句（时态）“ i want to know if it will rain tomorrow,If it rain We don't know if it rains tomorrow.不是说if表 是否 时看具体时态吗为什么这里有to i don not know if it( rain )tomorrow.if it (rain 英语急问：1.I don't know if it ___(rain)tomorrow.But if it ___(ra I don't know if he __(come) if it ___(rain) tomorrow.请问第二个空该 I don't know if it will rain tomrrow If引导的条件状语从句时态不是主将从现吗 为这 I find it _____(rain)tomorrow 横线中应填什么 I find it _____(rain)t