What are some of the ways that actors identify how to move and speak for a particular role?

One of the most important things that the actor needs to know about the character that he is going to interpret is to know why it is relevant in the story that he will make known during the interpretation, what contribution he had in the story, how the era was in the that said character lived, what customs he had, etc. Knowing this, he could perform a theatrical interpretation of the character closest to him and therefore more reliable.

Explanation:

The theater classes are responsible for providing the indispensable tools to the actors to accurately interpret the dramatic pieces. During the classes the actor's oral and body expression evolved, for this there are also voice and body expression techniques, so that concentration, reading, as well as the analysis of theatrical scripts are applied in them.

A good actor should be able to repeatedly read the script and rehearse it until the role has its own touch and that the character that is going to interpret fits your personality. An actor must ask himself who the character is, where they are going, why important to the story. Likewise the interpreted characters look for a comet, identify what desire moves them.