This document discusses using present tenses to talk about the future in English. It explains that the present simple is used for events based on official timetables or calendars. The present continuous is used for people's plans and arrangements. Verbs like "hope", "expect", and "intend" take a "to"-infinitive clause to indicate uncertainty. In subordinate clauses like "if" clauses, the present simple is normally used to refer to future events. The present perfect is used to show a condition must be met before a future action.