There is something that wasn't mentioned, that is my favorite grammar error. Subjunctive mood. Use subjunctive mood (meaning "were") when what is stated is contrary to what is. You say, "If I was taller I could reach the high shelf!" I, rip my hair out. You should say, "If I were taller I could reach the high shelf!" Okay? Good. I'm glad we all learned subjunctive mood today. No one uses subjunctive mood, and you will die or I will go bald if you don't start using it now. Thank you. ;)