Basic grammar A1-A2
To jest twoja decyzja, nie moja.
It's your decision, not mine. (possessive adjectives and pronouns)
Czy Piotrek jest w domu? Nie, jest w pracy.
Is Peter at home? No, he's at work. (prepositions of place)
On ją kocha, ale ona go nie kocha.
He loves her, but she doesn't love him. (object pronouns + Present Simple)