Attention would-be testers. This is the Grammar Police. Come out with your hands up!
Grammar mistakes in real life are just going to happen. We all make mistakes from time to time - even English teachers! If you're taking a standardized test like the SAT, GRE, ACT, state standardized tests and more, however, these grammar mistakes can hold back your test score in a major way. Just a few mistakes can knock down the Verbal portion of your exam.
So, take the time now to get rid of these seven common grammar mistakes (everything from bad pronoun/antecedent agreement to improper usage of apostrophes) so your test score is as high as it can possibly be.