Herbert Weir Smyth, A Greek Grammar for Colleges

Subject in the Singular, Verb in the Plural

Thus, ““τὸ στρατόπεδον ἐν αἰτίᾳ ἔχοντες τὸν Ἆγιν ἀνεχώρουν” the army returned holding Agis at fault” T. 5.60, ““τοιαῦτα ἀκούσα_σα ἡ πόλις Ἀ_γησίλα_ον εἵλοντο βασιλέα_” the city, after hearing such arguments, chose Agesilaus king” X. H. 3.3.4. So with βουλή senate, μέρος part, πλῆθος multitude, δῆμος people, ὄχλος throng.

[*] 951. So with ἕκαστος: τῶν ἑαυτοῦ ἕκαστος καὶ παίδων καὶ χρημάτων ἄρχουσι every man is master of his own children and property X. R. L. 6.1.

[*] 952. If ἕκαστος, ἑκάτερος, ἄλλος are added in apposition to a plural subject, the verb generally remains plural: ““ἐγώ τε καὶ σὺ μακρὸν λόγον ἑκάτερος ἀπετείναμεν” both you and I have carried on a long controversy” P. Pr. 361a. If the verb follows the apposition, it may be singular: οὗτοι μὲν ἄλλος ἄλλα λέγει these say, some one thing, some another X. A. 2.1.15. Cp. 982.

[*] 953. A subject in the singular, followed by a clause containing the preposition μετά with, rarely takes a plural verb: ““Ἀλκιβιάδης μετὰ Μαντιθέου ἵππων εὐπορήσαντες ἀπέδρα_σαν” Alcibiades and Mantitheus escaped because they were well provided with horses” X. H. 1.1.10.