Ο υπεύθυνος ορόφου ελέγχει τον πυροσβεστήρα.

to check

Breakdown of Ο υπεύθυνος ορόφου ελέγχει τον πυροσβεστήρα.

• ο πυροσβεστήρας: the fire extinguisher
• ο υπεύθυνος ορόφου: the floor warden

Questions & Answers about Ο υπεύθυνος ορόφου ελέγχει τον πυροσβεστήρα.

Is υπεύθυνος an adjective or a noun here?

Originally, υπεύθυνος is an adjective meaning responsible. But in this sentence it is being used like a noun, meaning the person in charge / the supervisor / the manager.

This is very common in Greek: an adjective can function as a noun when the context makes the person or thing clear.

So here:

• ο υπεύθυνος = the person in charge / the supervisor

If the person were female, Greek would use the feminine form:

• η υπεύθυνη

What case is each noun in this sentence?

The sentence contains three noun forms with three different functions:

• ο υπεύθυνος — nominative
  This is the subject, the person doing the action.

• ορόφου — genitive
  This means of the floor, showing what the supervisor is responsible for.

• τον πυροσβεστήρα — accusative
  This is the direct object, the thing being checked.

So the structure is basically:

• [subject] [verb] [object]
• with ορόφου attached to υπεύθυνος to specify what kind of supervisor

Why is ορόφου in the genitive?