In the languages where the verb agrees with subject and object, if there are forms like s-V-o, and there are no forms like o-V-s, then the dominant word order is one with the initial predicate position (VSO or VOS).
Standardized
Whenever there is verb agreement with subject and object, IF the orderings of agreement markers on verbs include s-V-o but not o-V-s, THEN basic word order is verb-initial (VSO or VOS).
Cf. a reverse implication of Keenan’s (1519): If transitive verbs in subject-final languages have agreement at all, then they have prefixal (pre-verb stem) agreement with subjects and suffixal agreement with non-subjects.
Cf. a reverse implication of Keenan’s (1519): If transitive verbs in subject-final languages have agreement at all, then they have prefixal (pre-verb stem) agreement with subjects and suffixal agreement with non-subjects.