Screenplay Basics - Scripped. A Scripped Compendium by Johnathan Carr Traditional storytelling recounts past events, whereas screenwriting is locked in the present - thus you may not deviate from PRESENT TENSE.
You may also be tempted to describe every inch of the world you're creating - don't! Take comfort in the idea that a screenplay is not meant to have any literary value. As you're writing, be mindful to preserve only the most important details: information that will advance the story. At the beginning of a feature film script, often but not always, the first line will be: FADE IN.
The Script Lab – Screenwriting Education and Screenplay Development. Scripts and monologues. Scripts. The Soul of the American Actor.