Postby sasuga3363352 » June 21st, 2011 3:24 am 
			Hello, dear beginner in Russian,
the Russian guy's explanation is pretty good, so I have just a tiny thing to add.
Vy and ty are pronouns and in Russian they have declensions . 
There are six case but for now I guess it is good to remember the first three:
Nominative  vy   ty                       Inicial (like dictionary form) Who are you?  Кто вы? Кто ты?
Genitive      vas  tebya                 Used as an objective I see you. Я вижу вас.  Я вижу тебя.
Dative         vam tebe                    Used like to whom.  I give this flower to you. Я дарю вам этот цветок. Я дарю тебе этот цветок.
Hope it is not too overwhelming,
Best regards,
Natalia