3B1 expresses question about the event, in fact expects it not to occur. 3B2 expresses uncertainty, it might or might not happen. 3B3 expects that it'll happen. I almost never see any from the 4 variations mentioned in the first put up. All four of those versions are acceptable. 1 https://petskyonline-onlinestrore.blogspot.com/2025/07/top-10-aquarium-essentials-for-new-fish.html