This document discusses three main English tenses used to talk about the future: will, be going to, and present continuous. It makes two distinctions between will and be going to. Be going to is used to talk about plans where a decision has already been made, like "I'm going to be a doctor." Will is used to talk about predictions based on evidence or guesses, like "It will rain soon." The document provides examples and rules for using be going to and will to discuss future plans versus predictions.