It's (moja) ball.
my
Is it (twój) mobile?
your
It isn't (mój) jumper..
my
Is it (twój) bike?
your
Is it (twój) car?
your
They aren't (moje) shoes.
my
They are (moje) Lego blocks.
my
It isn't (twój) laptop.
your
It isn't (mój) umbrella.
my
Is it (twój) coat?
your