3B1 expresses doubt about the occasion, in truth expects it not to happen. 3B2 expresses uncertainty, it would or won't come about. 3B3 expects that it'll come about. Stack Trade network is made of 183 Q&A communities which include Stack Overflow, the largest, most dependable online Local community for developers https://share.evernote.com/note/322c01fe-9008-3c72-bd31-8f22a20441b7