These prefixes are clearly cognate across the branches, although their use within the verbal systems of the individual languages varies.
ðiːz pɹˈiːfɪksᵻz ɑːɹ klˈɪɹli kˈɑːɡneɪt əkɹˌɑːs ðə bɹˈæntʃᵻz, ɔːlðˈoʊ ðɛɹ jˈuːs wɪðˌɪn ðə vˈɜːbəl sˈɪstəmz ʌvðɪ ˌɪndᵻvˈɪdʒuːəl lˈæŋɡwɪdʒᵻz vˈɛɹiz.