English can be a tricky language. You might be using the language every day or even be extremely fluent in it. Some words and phrases may sound right in your head, but when you actually write it, it might be wrong. There a few common errors that people make frequently. We have compiled a list of common grammar mistakes that can annoy every grammar Nazi.

Grammar Nazis are not the only ones, even book lovers are a sensitive bunch. Here are 9 dreadful things you should never say to a book lover.