My high Intermediate students are working on Past Unreal Conditionals, so we’ve been reviewing all of the conditional forms. This is a bit like solving a puzzle, remembering all of the structure of the if-clause, the result-clause, and what the meanings are of each form, once they’re constructed. Like every other skill, the more you can practice, the easier it gets. This ESL Grammar Practice website has excellent practice for new grammar points, and also includes videos to explain new points. If you want to speak and write English fluently and clearly, correct use of conditional forms is important. It’s even more important to understand the meaning of a conditional sentence, to avoid confusion. Take some time to practice this form and to put together some “If I had” and “If I hadn’t” sentences of your own.