3B1 expresses question around the event, in truth expects it not to happen. 3B2 expresses uncertainty, it would or might not transpire. 3B3 expects that it's going to happen. Stack Exchange community contains 183 Q&A communities such as Stack Overflow, the biggest, most trusted online community for developers to know, https://share.evernote.com/note/266f95e8-06c5-b07f-f358-b5fa5674526f