This document discusses the first conditional, which is used to talk about possible situations and their probable consequences in the future. It follows the structure of "if + present tense, will/won't + base form of the verb." Examples are provided to demonstrate affirmative and negative sentences in the first conditional, as well as question forms using "will + subject + simple present + if + subject + simple present" or "if + subject + simple present + will + subject + simple present." Common uses of the first conditional include talking about the possible results of actions or what may happen based on certain conditions.