офісу

In a sentence

• Ми заходимо до затишного офісу.

  We are entering the cozy office.

  In this sentence, "офісу" is in the genitive case to indicate movement into the office.

• Ця нова будівля є поруч із моїм офісу.

  This new building is near my office.

  Here, "офісу" is in the genitive case, showing possession or proximity related to the office.

• Я не бачив ключів від офісу.

  I haven't seen the keys to the office.

  In this example, "офісу" is in the genitive case, used to denote an object of a relationship.