The document discusses the first conditional, which is used to talk about possible situations in the present or future. It has an if-clause (e.g. "if you study hard") and a main clause (e.g. "you will pass the test"). Several examples are provided to illustrate using the first conditional to talk about things that may happen, such as "If it's sunny, we'll go to the park." Exercises are included for the reader to practice forming first conditional sentences.