This is the 5879th most frequent Polish word.
zdań
"Zdań" is the genitive plural form of the Polish word "zdanie," which means "sentences" or "opinions."
Here, 'zdań' refers to the plural genitive form of 'sentence,' used after 'pełnych' (complete in genitive plural form).
Powinieneś się nauczyć pisać pełnych zdań.
You should learn to write complete sentences.
'Zdań' is used in plural genitive case, indicating 'sentences' as the object of the preposition 'z' (from).
Nie można wyciągać wniosków z pojedynczych zdań.
You cannot draw conclusions from single sentences.
'Zdań' in this sentence is the plural genitive form of 'sentence' after 'kilka' (a few), which requires the genitive case.