Most grammars of AA posit a distinction between perfective and imperfective verbal aspects, which can be found in Cushitic, Berber, Semitic, most Chadic languages, and some Omotic languages.
mˈoʊst ɡɹˈæmɚz ʌv ˌeɪˈeɪ pˈɑːzɪt ɐ dɪstˈɪŋkʃən bᵻtwˌiːn pɚfˈɛktɪv ænd ɪmpɚfˈɛktɪv vˈɜːbəl ˈæspɛkts, wˌɪtʃ kæn biː fˈaʊnd ɪn kʊʃˈɪɾɪk, bˈɜːbɚ, sɛmˈɪɾɪk, mˈoʊst tʃˈædɪk lˈæŋɡwɪdʒᵻz, ænd sˌʌm ɑːmˈɑːɾɪk lˈæŋɡwɪdʒᵻz.