1. YOU’RE and YOUR
If you have no idea when to use which … well, you’re not on your own. This is perhaps the most common mistake of all. Heaven knows why. The distinction is really quite simple:
• You’re is used to substitute the words you are.
• Your is a word you use when referring to something that belongs to the person you’re speaking to. “Your purse,” “your coat,” and so on—and not “Your late!” or “Your wrong!”