Questions & Answers about Po wejściu do wagonu pytam, czy ten przedział jest wolny.
Because po in the sense of after takes the locative case.
- base form: wejście = entering / entrance
- locative singular: wejściu
So po wejściu literally means after the entering, but in natural English it is simply after entering.
This is a very common Polish pattern:
- po przyjeździe = after arriving
- po powrocie = after returning
- po skończeniu pracy = after finishing work
In this sentence, wejście is a verbal noun, formed from wejść = to enter.
Because do normally requires the genitive case.
- base form: wagon
- genitive singular: wagonu
So:
- do wagonu = into the carriage / train car
This is the standard pattern:
- do domu = into/to the house
- do pokoju = into/to the room
- do pociągu = into/to the train