This document discusses conditional sentences. It explains that conditional sentences describe situations that are dependent on certain conditions being met. There are two main types of conditional sentences discussed: unreal conditionals which refer to improbable or impossible situations, and conditional type 2 which refer to present actions that could occur if the present situation were different. The document provides examples of conditional type 2 sentences which use "were" instead of "was" in the if-clause, even when referring to I, he, she or it. It also notes that "was" can also be used in some cases.