you're

\yər, ˈyu̇r, ˈyȯr, ˌyü-ər\
  1. contraction of you are <I'm glad you're learning how to sound more intelligent!>

your

-pronoun \yər, ˈyu̇r, ˈyȯr\
  1. a possessive case of you used to indicate belonging <Your careless disregard for English makes you look stupid.>

  2. belonging to or associated with oneself or any person <Using proper grammar improves your chances of employment.>

  3. an informal indication of a group or particular type of things (sometimes used to convey familiarity) <You can learn more about these words in your standard dictionary.>