The difference between "your" and "you're"
I mean, how hard is it?
"Your" = belongs to you
"You're" = You are.
And then there's "there"
"There" - refers to a place
"Their" - belongs to them
"They're" - They are.
It's not difficult! And supposedly well educated people I work with still can't do this!
And while I'm ranting, why do people use the word "allot" when they mean "a lot". Just 'cos the spellchecker doesn't pick it up, doesn't mean it's the right word!