This document discusses the use of the second conditional structure "If + past tense, would + infinitive" to describe hypothetical or improbable situations and their consequences. It provides several examples of using this structure to talk about what someone would do if a certain condition were met, such as "If I were rich I would travel around the world" or "If I won the lottery I would buy a big house." The document also includes questions prompting the reader to consider what they would do in various hypothetical scenarios using the second conditional form.