I don't know if Betty_____back,but if she________back,I will

I don't know if Betty_____back,but if she________back,I will I don't know where you are,but if i find you,i will love you i don't know whether it will rain or not .but if it __.i sha I don't know if Mr.Green_______(come) tomorrow,but I will le I don’t know if i will be free tomorrow.if i am free,i will I don't know if I will go there. don't know if the story is true,but I will try to______it. i don't know if i ___ free tomorrow .if i ___ free ,i will f I don't know if he will come tomorrow. 为什么I don't know if it will rain tomorrow But I don't know if I think too much.为什么要把 if 改成whether? I don't know if it------tomorrow,but if it-----,I'll go swim