You should of known better! Actually, you should HAVE known better about these common grammar pet peeves that drive people crazy. Grammar errors are easy to miss, and they’re often habitual.

Make sense? Here are the 20 most confusing rules in the grammar world. Another of Koontz’s most annoying pet peeves occurs when she spots “alright” instead of “all right.” Koontz ...

I asked a handful of journalists about their own grammar pet peeves. They range from the very specific to the broader wish that we used grammar to spread peace, not war. What are yours?