kɹˈɪstəfɚɹ ˈeɪɹɪt hɐz pɹəpˈoʊzd ðæt pɹˈoʊɾoʊˌæfɹoʊˌeɪsɪˈæɾɪk ɚɹˈɪdʒɪnəli hæd æz mˈɛni æz θˈɜːɾisˈɛvən sˈɛpɹət vˈɜːbəl ɛkstˈɛnʃənz, mˈɛnɪəv wˌɪtʃ ðˈɛn bɪkˌeɪm fˈɑːsəlˌaɪzd æz θˈɜːd kˈɑːnsənənts.
Christopher Ehret has proposed that Proto-Afroasiatic originally had as many as thirty-seven separate verbal extensions, many of which then became fossilized as third consonants.