I think these links will help you a lot: http://www.englishgrammarsecrets.com/secondconditional/menu.php http://www.perfect-english-grammar.com/second-conditional.html Good luck

I agree with Ghadeer - if it's a general question (like this question), you can look at the hundreds of websites which give a clear explanation. For a specific question, which can't be answered by these websites, please feel free to ask here.