"Máš svoji kočku."

Translation: You have your cat.

[Pollyhs]

mas svou kocku. is that also correct?

[VladaFu]

yes

[im.Andrew]

svoji and svou are interchangeable?

[Dmitry532061]

Maybe,it is more closer to "You have your own cat"?

[VladaFu]

I would translate that with "svoji vlastní".

[vgSe5]

Are there different form of "you" in Czech, as there is in Russian more formal "вы" and informal "ты"?

[VladaFu]

Yes and it is the topic of the Thou skill which you will encounter very soon. They sound almost the same in Czech: ty and vy.