Question

suppose the moons rotation took half the time of its revolution how would we see the phases of the moon be the same and how would it be different

Answer 1

It would have no effect on the phases. They would all have the shape that they have now, and they would occur on the same schedule as they do now. BUT ... sooner or later, we would see the FULL surface of the moon, instead of the half of it that we see now.