This document discusses different ways to express unreal or hypothetical situations in English using conditionals and expressions like wish and if only. It explains the structure of real conditionals, present unreal conditionals, and past unreal conditionals. It also covers using wish, hope, and if only to talk about desires or regrets in the present, future, and past. Examples are provided to illustrate the different conditional and expression structures. The document concludes with practice exercises for readers to complete conditionals and make wishes about pictures using the proper tenses and structures.