Learn Hardcore Polish: Lekcja została przeniesiona na jutro.

Została is the auxiliary verb used to form the passive voice in the past tense. It comes from zostać (“to become”), and together with the passive participle (przeniesiona) it indicates that the lesson was moved by someone (though the doer isn’t specified).

Why is przeniesiona ending with –a?

Lekcja is a feminine noun in the singular. In the passive past participle, adjectives and participles agree in gender, number, and case with the noun they describe. Hence przeniesiona is feminine singular nominative.

Could we use a different preposition instead of na before jutro?

No, na jutro with the accusative expresses scheduling or allocation of time (“for tomorrow”). Other prepositions like w jutro or do jutra change the meaning or are ungrammatical in this context.

Why isn’t the agent (the person who moved the lesson) mentioned?

In Polish passive constructions, the agent is often omitted when it’s unknown, irrelevant, or obvious. If you wanted to mention them, you could say Lekcja została przeniesiona na jutro przez nauczyciela (“The lesson was moved to tomorrow by the teacher”).

Is there a more colloquial way to say this?