You're vs Your

(notice the mistake?)

You're (short form) = you are

Your're is often followed by the present participle.

You're going to be late.

You're much better at table tennis than Mark is.

Your is a possessive form of You.

Refers to something that a person has, or something that belongs to that person. Your is almost always followed by a noun. Your will usually nor be followed by an adjective when that adjective is describing the person that your talking to. For example, Your very kind will only be correct if you are describing a noun. This sentence is correct because nice is describing someone's, for example, daughter.

What is your name?

Is this your car?

Your book is on the table.