Linear structure: There are several different narrative structures in films. A linear structure is a basic structure that we see in films its where it has a beginning (where the audience is introduced to the characters and story), a middle (where the events of the story build up) and finally a end (this is the closure of the film).
Open structure:
A open structure follows the same rules of a linear structure until the end of the film there is no closure letting the audience to wonder what happens next and are left to make sense of it for themselves. Soap Operas follow this structure as it will make the audience want to watch the following episode as they want to know where the stroy-line will go next shifting from each character with several different story-lines.
Closed Structure:
This is where there is a definite ending and clear conclusion for the audience with 'the end' to complete the story. The time is compressed to fit into a typical length of a film which is around 2 hours and it's not in 'real time'.
Circular Structure:
This is where the narrative begins at the end often with a climax to begin with. This allows the audience to be taken back on a journey and the film finishes in the same place.In other words it is filling in the blank for the audience. A example of a film that uses this structure is "Pulp Fiction" the narrative is told out of chronological order and follows three interrelated stories. It begins in the diner and finishes there also making it a circular structure.