Questions & Answers about W niedzielę jem śniadanie późno.
niedzielę is in the accusative case. In Polish, when you specify a precise point in time (like a specific Sunday), you put the time expression after w and decline it in the accusative.
• w + accusative = “on (this day)”
• e.g. w poniedziałek, w środę, w niedzielę
Polish verbs come in aspect pairs:
• jem is imperfective (jeść) – it describes an ongoing or habitual action: “I eat / I’m eating breakfast (late).”
• zjem is perfective (zjeść) – it describes a single, completed action: “I will eat / I ate breakfast (and it’s done).”
Because the learner’s sentence implies either a habit or a general present action, jem is the right choice.