The document discusses different ways to express wishes in English using "wish" and "if only". It provides examples of wishing for change, different present and past situations, and regrets about the past. Some key uses include:
- "Wish" and "if only" to express a wish.
- "Subject + would + bare infinitive" to express a polite request or a desire for something to happen/stop happening.
- Past simple/continuous for wishing a present situation was different.
- Past perfect for expressing regret about something that did/didn't happen in the past.