To have or not to have...

have - mieć

Attention! = Uwaga!

I have / I don't have / Do you have...?
I have got = I've got / I haven't got / Have you got...?

I have a book.

I don't have a pen.

Do you have a pencil?   Yes, I do.   /   No, I don't.

I've got a book.

I haven't got a pen.

Have you got a pencil?   yes, I have.   /   No, I haven't.

own - posiadać

belong to - należeć do

lose, lost, lost - zgubić, stracić
find, found, found - znaleźć