Original sentence: Although some Afroasiatic languages have developed free word order, it is generally surmised that PAA was originally a VO language.It is proposed that Proto-Afroasiatic had marked nominative case marking, i.Marked nominative case marking is still found in languages of the Cushitic, Omotic and Berber branches.the subject was overtly marked for nominative case, while the object appeared in unmarked default case
Edited sentence: Although, latter Afro-Asiatic descended languages may have evolved areal or (variable) free word order.It is generally surmised that PAA was originally a VO language.Proto-Afroasiatic was believed to be a Nominative-Absolutive ("Marked nominative") language; due to most Afro-Asiatic languages evidently marking the Nominative case; while leaving the Object case to be unmarked (Absolutive)