The train worker checks to make sure that everything is okay before the train leaves the station.
De treinwerker controleert of alles in orde is voordat de trein het station verlaat.
The train worker doesn't check anything.
De treinwerker controleert niets.
The train worker doesn't check anything before train leaves station then they will face difficulties in midway.
De treinwerker controleert niets voordat de trein het station verlaat dan zullen ze halverwege problemen ondervinden.