3B1 expresses doubt over the event, without a doubt expects it not to occur. 3B2 expresses uncertainty, it would or might not occur. 3B3 expects that it'll transpire. Stack Trade network is made of 183 Q&A communities like Stack Overflow, the biggest, most trustworthy online community for builders to learn, https://www.slideshare.net/slideshow/celebrate-life-s-moments-with-hemani-mehmi-s-premier-indian-catering/281692841