The document discusses the future tenses "will" and "going to" in English. It explains that "will" is used to make predictions based on what the speaker thinks or to make promises or offers. "Going to" is used to talk about future plans and intentions or predictions based on present evidence. It provides examples of how to form affirmative, negative, and interrogative sentences using "will" and "going to." Additionally, it mentions other ways to express the future like the present continuous tense and using the modal verb "might" to talk about future possibilities.