An apostrophe can make a big difference! What do you think?
At least they put the apostrophe in we're!
and you think you have made a difference?...
A Guide to Using Apostrophes
What a difference a comma (or two) can make!
What is the Most Maddening Writing Error? Misused Apostrophes.
Craft Snark: Proper Apostrophe Use - You're Welcome
10 Grammar Mistakes: Teaching the difference between who and whom
It sounds like something a wild-haired Seuss character would leave behind after a big meal and a digestif, and it looks like something a frog might evolve from.
Why punctuation matters. It makes a huge difference in the meaning of your writing!