Question

what ia difference between it may rain or it may be rain.​

Answer 1

Answer:

May' has the probability of rain occurrence. 'Might' can be used when the situation not going to happen. Since it is about rain, it is better to use

Answer 2

Answer:

Subtle difference, and technically the first is simply ungrammatical, but “It may be rain outside” uses “rain” as an adjective describing “it.” This becomes apparent when you realize that you could swap it with any other adjective, as in “it may be hot outside.”