The document discusses the second conditional, an "if" conditional used to refer to unlikely or imaginary situations. It contains the following information:
1. The structure of a second conditional sentence is "If + past tense, subject + would + base verb." For example, "If I were rich, I would travel the world."
2. Second conditionals are used to talk about unlikely, imaginary or impossible situations. They can also be used to give advice in an indirect way.
3. Examples are given of how second conditionals are commonly used in daily conversation, compositions, daydreaming and other contexts.