OK, I'll ask you some questions:
1) When we imagine the past and we use "if", what's the verb form that follows?
2) Is "would" a past modal or a present modal?
3) How likely is tomorrow's rain?
4) Either order is fine, but how would you punctuate the sentences correctly?
You can answer all of these questions (and then have the answers to your questions) with intermediate-level English.