This document discusses various ways to talk about the future in English using different verb tenses and structures:
1) The present simple is used for future events on a schedule like "The train leaves London at 9pm tonight."
2) The present continuous is used for future plans and arrangements like "They are working tomorrow."
3) "Be going to" is used for predictions based on evidence and intentions or plans like "It's going to rain" and "We're going to paint our bedroom."
4) "Will + infinitive" is used for spontaneous decisions and predictions like "I'll get a pencil" and "People will go to Mars."
5) The future continuous