Case agreement is not an essential feature of English (only personal pronouns and pronouns with a case mark). A concordance between these pronouns can sometimes be observed: in this in-depth study of the Chamorro Agreement (Malayo-Polynesian), Chung questions certain aspects of the standard minimalist treatment of the agreement and, what we consider an agreement, in fact breaks down two distinct relationships: one that is responsible for the integration of two syntactic elements into a formal relationship. , and a second responsible for actual morphological covariance (if observed). Foot, Eric. 2005. The Rise of Concordance: a formal approach to syntax and grammar of verbal difference. Amsterdam – Philadelphia: John Benjamins. Another characteristic is the concordance in participations that have different forms for different sexes: Lehmann, Christian. 1988.
On the function of the agreement. In Michael Barlow – Charles A Ferguson (note), Accord in Natural Language, 55-65. Stanford, CA: Center for the Study of Language and Information. At the beginning of modern times, there was an agreement for the second person, which singularus all the verbs in the current form, as well as in the past some usual verbs. It was usually in the shape-east, but -st and t also occurred. Note that this does not affect endings for other people and numbers. The very irregular verb is the only verb with more coherence than this one in the contemporary form. Bickel, Balthazar, Alena Witzlack-Makarevich, Taras Zakharko – Giorgio Iemmolo. 2015.
Exploring the diachronic universal of concordance: alignment pattern and zero marking on categories of people. To Jerg Fleischer, Elisabeth Rieken and Paul Widmer (note.M.), agreement from a diachronic point of view, 29-52. Berlin – Boston: De Gruyter Mouton. Siewierska, Anna and Dik Bakker. 2005. The agreement on the identification of persons in FG. In Casper de Groot – Kees Hengeveld (Eds.), Morphosyntactic expression in functional grammar (Functional Grammar 27), 203-247. Berlin – New York: Gruyter Sheep.