I read on a post that "The ya1 at the end is a filler word that serves to inject friendliness and soften the tone of an otherwise rude sentence." And I know that ma is used to form a Yes/No question. Ba is for suggestions, is that right? Please correct me if I'm wrong. What about Ne? and others I failed to mention? What do they mean exactly and how and when are they used? Thanks for your help.