What grammatical rule do most people get wrong?

1. I, love how, some people on Reddit, use commas.
   — vanillagorilla3


2. It always surprised me when I come across adults who still don't understand the difference between there, their, and they're. Especially professionals working in an office sending emails every day.
   — OneFreamon


3. Not a grammatical rule, but people mixing up "lose" and "loose" drives me insane.
   — DenisOHare






4. You know how people always correct you when you say things like "me and Phil went to party" with "no no...'phil and I went to the party'" Sometimes it's "Me" and people don't get that anymore. i.e. "He stood between Phil and me"
   — poo-boys-united


5. Apostrophes. I see way to much apostrophe terrorism on reddit. Example: Apostrophe's Example's
   — Hydro_21


6. "The reason is because..." It should be, "The reason is that..." And here's a very annoying new one, "The reason is is..." There is absolutely no way the is should be repeated except that people have gotten into a sloppy speech pattern.
   — Burgundy93






7. Things are hung, people are hanged.
   — Our_lord_Doge


8. less/fewer. You have less of something that you can't count, like water or courage. You have fewer people or cars.
   — Octopuswiggles


9. a/an - especially with abbreviated words.
   — _Hopped_