A compound sentence consists of two or more simple sentences, grammatically independent of one another and generally united by a coördinating conjunction. Thus,
τῇ δὲ ὑστεραίᾳ ἐπορεύοντο διὰ τοῦ πεδίου καὶ Τισσαφέρνης εἵπετο
a. Abbreviated compound sentences, i.e. sentences containing a compound subject with a single verbal predicate or a single subject with a compound verbal predicate, are treated in this book as expanded simple sentences ( cross923, cross924).2163
Greek has, among others, the following coördinating conjunctions, the uses of which in connecting sentences, clauses, phrases, and single words are described under Particles.
A. Copulative conjunctions: τέ (enclitic), καί
καί, καὶ . . . καί
B. Adversative conjunctions: ἀλλά
C. Disjunctive conjunctions: ἤ
D. Inferential conjunctions: ἄρα
E. Causal conjunction: γάρ
Compound sentences are divided into Copulative, Adversative, Disjunctive, Inferential, and Causal sentences.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].