If someone is talking to you, and you don’t hear him/her very well;
10. Wrong: you don’t say “excuse me” or “come again”
Right: you say “I beg your pardon” or “please recap”
Even after years of learning it in school, grammar is just one of those things people still mess up.
When this happens, go through this post and find out which common grammar mistakes echo together with you the most. Take note to avoid blunder in future, or just bookmark this blog post to help remind yourself of these again and again (and over) again.