YOU'RE
"You are" as a contraction - You're - You are a nice person - You're a nice person.
"You" as a possesive expressed about a second person - Your - Your dog has fleas. Your Rv8 is fun to ride in.
A simple usage test.
1. You are = You're
2. Where "your" should be used can also be substituted with "my" as a test of the statment's usage sense.
You are dog has fleas
Your dog has fleas.
My dog has fleas.
I hate grammer and equat learning it to scraping barnacles with my fingernails. But, one does the funniest things to pay the bills.