Universal 422: verb agreement with members following the verb ⇒ verb agreement with members preceding the verb
Original
There is no language where, given a constituent class including both members that precede the verb and also members that follow the verb, the verb would agree with some or all of those members following it but with none of those preceding.
Standardized
Provided there is a constituent class including both members that precede the verb and also members that follow the verb: IF the verb agrees with some or all of its postverbal members, THEN the verb also agrees with at least some of its preverbal members.
If there is agreement with any definite or indefinite subjects, or any definite or indefinite direct objects, or any definite or indefinite indirect objects, or any definite or indefinite adverbials, there will be agreement with all preverbal definite or indefinite subjects, all preverbal definite or indefinite direct objects, all definite or indefinite indirect objects, and all preverbal definite or indefinite adverbials, respectively.
If there is agreement with any definite or indefinite subjects, or any definite or indefinite direct objects, or any definite or indefinite indirect objects, or any definite or indefinite adverbials, there will be agreement with all preverbal definite or indefinite subjects, all preverbal definite or indefinite direct objects, all definite or indefinite indirect objects, and all preverbal definite or indefinite adverbials, respectively.