3B1 expresses doubt over the party, in truth expects it not to occur. 3B2 expresses uncertainty, it would or won't transpire. 3B3 expects that it's going to transpire. I almost never see any of the four variations described in the original article. All four of those variants are acceptable. 1 https://petskyonline-onlinestrore.blogspot.com/2025/07/top-10-aquarium-essentials-for-new-fish.html