Questions & Answers about Zero klientów czeka.
Because after zero, Polish uses the genitive plural form of the noun.
- singular dictionary form: klient
- nominative plural: klienci
- genitive plural: klientów
So:
- klienci czekają = the customers are waiting
- zero klientów czeka = zero customers are waiting / no customers are waiting
This is one of the big differences between English and Polish number expressions.
In English, customers is plural, so English uses are waiting.
In Polish, expressions with zero are normally treated grammatically like a singular quantity expression, so the verb is 3rd person singular:
- Zero klientów czeka.
That is why you get czeka, not czekają.
A very similar pattern happens with larger numbers too:
- Pięć osób czeka. = Five people are waiting.