ошибку

In a sentence

• Я допустил ошибку в тесте.

  I made a mistake in the test.

  Here, 'ошибку' (a mistake) is used in the accusative case as the object of the verb 'допустил' (made). It demonstrates use in the context of an error committed in an action.

• Ошибка привела к потере данных.

  The mistake caused data loss.

  In this instance, 'ошибка' (a mistake) is in the nominative case, acting as the subject of the sentence. It showcases how the noun can signify a cause leading to a consequence.

• Извините за мою ошибку.

  Excuse my mistake.

  Here, 'ошибку' is in the accusative case after the preposition 'за', indicating what is being referred to — the mistake for which apologies are made.