You're is a contraction of the two words YOU ARE.

EXAMPLE:
You're very special to me.

Your shows possession.

EXAMPLE:
Is that your coat?

1. Your / You're going to drop that!

2. Your / You're brother came to see me.

3. Is that your / you're cat?

4. If your / you're going, you better hurry!

5. Why are your / you're fingers red?

6. It's none of your / you're business!

7. Your / You're bike's tire is flat.

8. Your / You're kidding!

9. Have it your / you're way.

10. I thought your / you're report was great!

11. He thinks your / you're wonderful!

12. If your / you're are going, so am I!