386 of the most frequently used irregular verbs in the Latin language with all four principal parts. These ver...bs belong to the 4th Conjugation: (audio, audire, audivi, auditus). Note that nearly all of these verbs may show an ending other than -IVI in the perfect. We thus find "audii" as well as "audivi." Note also that the last four verbs of the audio are used only in the present, imperfect, and future.