3B1 expresses question more than the event, in fact expects it not to happen. 3B2 expresses uncertainty, it'd or may not transpire. 3B3 expects that it's going to take place. Stack Trade network includes 183 Q&A communities which include Stack Overflow, the biggest, most trustworthy online Local community for builders https://share.evernote.com/note/5ba95aa3-f93a-1f3e-cb79-1b717b4fe280