Questions & Answers about Na talerzu została tylko resztka ciasta.
Because the grammatical subject is resztka (a small leftover bit / a remnant), and resztka is:
- feminine
- singular
So the past-tense verb must agree with it:
- została = feminine singular
- zostało = neuter singular
- zostały = non-masculine personal plural, etc.
Also, zostać here means to remain / to be left, not just to be.
So:
- Na talerzu była tylko resztka ciasta = There was only a bit of cake on the plate
- Na talerzu została tylko resztka ciasta = Only a bit of cake was left on the plate
The version with została emphasizes that this is what remained after the rest was gone.
In Polish, many nouns ending in -a are feminine, and resztka is one of them.
Dictionary form:
- resztka = a small remainder, a scrap, a leftover bit
Because it is feminine, the past tense is:
- została
If the subject were masculine, you would get:
- został
If it were neuter:
- zostało
So the ending of the verb is one of the main clues showing the gender of the subject.