"To jest mój tata."

Translation: This is my dad.

[IamJustintime]

So in Polish ,,Tata" means English's "Papa"... and Polish's ,,Pa pa'' means Enlish's ''Ta-ta.''

[nod032]

Why tata and not tatą?

[Jellei]

If you have a "This is X" sentence, it starts with "To" (regardless of the grammatical gender and number), follows with "jest" (singular) or "są" (plural) and then the noun case is in Nominative.

[A477]

Why not Ten jest... ?

[mihxal]

https://www.duolingo.com/comment/13539270

[rockyderaze]

Hi, when is "mój" used with an ó ?

[immery]

I don't understand your question. There is no word "moj" or "muj", "mój" is always with "ó".

mój is singular masculine nominative, and vocative. For masculine nouns that have singular accusative=nominative (masculine not animated nouns), it is also accusative.