3B1 expresses question in excess of the occasion, certainly expects it not to occur. 3B2 expresses uncertainty, it would or may not take place. 3B3 expects that it will materialize. I rarely see any with the four versions mentioned in the initial post. All 4 of these versions are correct. https://petskyonline-onlinestrore.blogspot.com/2025/07/top-10-aquarium-essentials-for-new-fish.html