κτίριο

In a sentence

• Το κτίριο στην άκρη του δρόμου είναι παλιό.

  The building at the end of the street is old.

  In this sentence, 'κτίριο' is used as a standalone noun to refer to a specific building whose age is described.

• Αυτή η περιοχή έχει πολλά μοντέρνα κτίρια.

  This area has many modern buildings.

  Here, 'κτίρια' is used in its plural form to refer to multiple structures within a certain area.

• Το κτίριο χτίστηκε πριν από εκατό χρόνια.

  The building was constructed a hundred years ago.

  In this example, 'κτίριο' is used as the subject of the sentence to describe the object that underwent construction.