NARRATIVE

There are many ways of breaking down narrative structure. You may hear a movie described as a "classic Hollywood narrative", meaning it has three acts. News stories have their own structure. A lot of work has been done by literary theorists to develop ways of deconstructing a narrative. 

ROLAND BARTHES: FIVE CODES
Roland Barthes describes a text as

"a galaxy of signifiers, not a structure of signifieds; it has no beginning; it is reversible; we gain access to it by several entrances, none of which can be authoritatively declared to be the main one; the codes it mobilizes extend as far as the eye can read, they are indeterminable...the systems of meaning can take over this absolutely plural text, but their number is never closed, based as it is on the infinity of language..." (1974 translation)

What he is basically saying is that a text is like a tangled ball of threads which needs unravelling so we can separate out the colours. Once we start to unravel a text, we encounter an absolute plurality of potential meanings. We can start by looking at a narrative in one way, from one viewpoint, bringing to bear one set of previous experience, and create one meaning for that text. You can continue by unravelling the narrative from a different angle, by pulling a different thread if you like, and create an entirely different meaning. And so on. An infinite number of times. If you wanted to.
Barthes wanted to - he was a semiotics professor in the 1950s and 1960s who got paid to spend all day unravelling little bits of texts and then writing about the process of doing so. All you need to know, again, very basically, is that texts may be ´open´ (ie unravelled in a lot of different ways) or ´closed´ (there is only one obvious thread to pull on). (MediaKnowall site)

Barthes also decided that the threads that you pull on to try and unravel meaning are called narrative codes and that they could be categorised in the following five ways:

VLADIMIR PROPP ( Morphology of the Folktale, 1927) narratemes explained here

• Vladimir Propp’s theory was formed in the early twentieth Century. He studies Russian fairytales and discovered that in stories there were always 8 types of characters evident. These are: the hero, the villain, the donor, the dispatcher, the false hero, the helper, the princess and her father. He did not state these characters were all separate people e.g. the provider could also be the helper. There are only 8 different character types and only 31 things they ever do (character functions). Once you have identified the character type (e.g., the hero) it’s easy to guess what they will do (save the maiden, defeat the villain, marry the maiden or whatever) because each character has a SPHERE OF ACTION. This is easily relatable to films and programmes today.
• JOSEPH CAMPBELL- The Hero's Journey...

(see here for The Hero's Journey which is an outstanding explanation of Campbell's ideas)
TZEVESTAN TODOROV
This approach suggests narrative is simply equilibrium, disequilibrium, new equilibrium.
Todorov proposed a basic structure for all narratives. He stated that films and programmes begin with an equilibrium, a calm period. Then agents of disruption cause disequilibrium, a period of unsettlement and disquiet. This is then followed by a renewed state of peace and harmony for the protagonists and a new equilibrium brings the chaos to an end. The simplest form of narrative (sometimes referred to as ‘Classic’ or ‘Hollywood’ narrative). (Source: ESMedia)

CLAUDE LEVI STRAUSS
constant creation of conflict/opposition propels narrative. Narrative can only end on a resolution of conflict. Opposition can be visual (light/darkness, movement/stillness) or conceptual (love/hate, control/panic), and to do with soundtrack. Binary oppositions.
DAVID BORDWELL
(background biography)
Understand the position of Bordwell's ideas on classic Hollywood narrative in relation to other narrative frameworks here in this Slideshare on narrative theory
Classical Hollywood Cinema