Policjant stoi na rogu ulicy i pomaga rowerzystom.

and

Breakdown of Policjant stoi na rogu ulicy i pomaga rowerzystom.

• na: on
• ulica: the street
• pomagać: to help

Questions & Answers about Policjant stoi na rogu ulicy i pomaga rowerzystom.

What role does the word policjant play in this sentence, and what case/form is it?

Policjant is the subject (the doer of the actions stoi and pomaga). It’s in the nominative singular masculine form, which is used for sentence subjects in Polish.

Why do we use stoi here instead of jest?

Stoi is from the verb stać (“to stand”), emphasizing the action of standing at the corner. Jest (“to be”) would only state existence or location without that nuance of standing.

What case is na rogu, and why?

Na rogu uses the locative case, singular of róg (“corner”), because the preposition na when indicating location requires the locative case.

Why is ulicy in the genitive case?

In na rogu ulicy (“on the corner of the street”), ulicy is genitive singular of ulica (“street”). The genitive is used here to show that the corner belongs to the street—“corner of the street.”

What case is rowerzystom, and why is it used?