Grammar Pet Peeve!

Ok, I’ve been a member here since last February, and I’ve read A LOT of posts. The thing I can’t figure out is why so many people use “of” instead of “have” in certain places

ie.

“I should of done such and such such”

should be:

“I should *have *done such and such”

I know it sounds like nit-picking but I’ve seen it like 50+ times misused…and it drives me nuts…

ok, my rant is done :smiley: