3B1 expresses question more than the event, without a doubt expects it not to occur. 3B2 expresses uncertainty, it would or won't take place. 3B3 expects that it will happen. I hardly ever see any of the four variations mentioned in the original post. All four of those versions are https://petskyonline-onlinestrore.blogspot.com/2025/07/top-10-aquarium-essentials-for-new-fish.html