This document discusses the first conditional, which uses the present simple in the if-clause and will + infinitive in the main clause to talk about possible future events. It provides examples of using be verbs like am/is/are in the if-clause and normal verbs like don't/doesn't in negative if-clauses. Complete conditionals can be written with if at the beginning or end, and examples are given of conditional sentences about possible future events depending on certain conditions.