This user believes that couldn't've would make a perfectly fine word.
After having
Having learnt to appreciate good grammar, this user thinks that After is a superflous prefix.
"There's" with a plural subject
This user knows that "there's" with a plural subject is a pervasive grammatical error. There'sThere are too many people making this mistake. Don't be one of them.
to too two
This user thinks that too many people have no idea how to use words that they should have learned in grade two.
than then
This user understands the difference between using "than" and "then."
their there they're
This user thinks that there are too many people who don’t know that they're worse than their own children at spelling!
Based on experience, this user knows that based off is nearly always incorrect.
-ly
This user mourns the apparent death of the adverb, a loss that this user feels most serious.
’s
Thi's user know's that not every word that end's with s need's an apostrophe and will remove misused apostrophe's from Wikipedia with extreme prejudice.
…
This user is addicted to ellipses and has been known to use them indiscriminately...
;
This user is addicted to semicolons; he uses them frequently.
MistEYk
This user does not always see his grammar mistakes. It would be nice of you to correct them.