Before I jump on to graphic novels, I want to take a step back and think about what exactly does a story mean?
A story is a narration of events in sequence arranged purposely for telling. It is like reporting an event except that the narrator controls the events. (Eisner, 2008)
A story can be in any form. For example, stories in words, stories in images, stories orally narrated (grandmother narrating a story in illustration above) etc. All stories have structure (beginning, end and link of events that happen in between). Whether it is a visual medium or textual medium, every story has a framework / skeleton on which the whole narration is built. Structures of a story differs depending upon the nature of story.