Tzvetan Todorov

Tzvetan Todorov is a historian, philosopher and sociologist. He realised that each film tends to follow a similar structure. 

This is Todorov's 5 part narrative structure.

1. Equilibrium
2. Disruption of equilibrium
3. Recognition of disruption
4. Attempt of repair
5. New equilibrium 

An equilibrium is at the state where everything is seen as 'normal'.
The disruption is where an event is said to take place.
The recognition is where the characters realise they are in danger. 
An attempt to repair is when the hero tries to overcome this event.
The new equilibrium is the new normal.

There is a clear structure similar to this in The Hunger Games. 

Equilibrium - Katniss is living her normal day to day life as the official hunger games approaches 
Disruption - Primrose (her sister) gets chosen to fight so Katniss volunteers to take her place
Recognition - Katniss and Peeta are in the training camp practising to fight against the opposition
Attempt - Katniss and Peeta fight for survival 
New Equilibrium - They both survive and get to go back home