[*] 964. With two subjects in the singular, the verb may be dual or plural: Κριτία_ς καὶ Ἀλκιβιάδης ἐδυνάσθην ἐκείνῳ χρωμένω συμμάχῳ τῶν ἐπιθυ_μιῶν κρατεῖν Critias and Alcibiades were able to keep control of their appetites by the help of his example X. M. 1.2.24, ““Εὐρυμέδων καὶ Σοφοκλῆς ἀφικόμενοι ἐς Κέρκυ_ραν ἐστράτευσαν” on their arrival in Corcyra Eurymedon and Sophocles proceeded to make an attack” T. 4.46.
[*] 964. With two subjects in the singular, the verb may be dual or plural: Κριτία_ς καὶ Ἀλκιβιάδης ἐδυνάσθην ἐκείνῳ χρωμένω συμμάχῳ τῶν ἐπιθυ_μιῶν κρατεῖν Critias and Alcibiades were able to keep control of their appetites by the help of his example X. M. 1.2.24, ““Εὐρυμέδων καὶ Σοφοκλῆς ἀφικόμενοι ἐς Κέρκυ_ραν ἐστράτευσαν” on their arrival in Corcyra Eurymedon and Sophocles proceeded to make an attack” T. 4.46.