Herbert Weir Smyth, A Greek Grammar for Colleges

a. By particles (μέν, δέ, γέ, τέ, γάρ, οὖν) and by οἶμαι I think: ἐν οὖν τῇ πόλει P. R. 456d, εἰς δέ γε οἶμαι τὰ_ς ἄλλα_ς πόλεις to the other cities I think 568 c.

Note that the order τὴν μὲν χώρα_ν (1155) usually becomes, e.g. πρὸς μὲν τὴν χώρα_ν or πρὸς τὴν χώρα_ν μέν. Demonstrative ὁ μέν and ὁ δέ, when dependent on a preposition, regularly follow the preposition, and usually with order reversed (1109): ἐν μὲν ἄρα τοῖς συμφωνοῦμεν, ἐν δὲ τοῖς οὔ in some things then we agree, but not in others P. Phae. 263b.

b. By attributives: ““εἰς Καΰστρου πεδίον” to the plain of the Cayster” X. A. 1.2.11.

c. By the accusative in oaths and entreaties (with πρός): πρός σε τῆσδε μητρός by my mother here I implore thee E. Phoen. 1665; cp. per te deos oro and see 1599.

N.—A preposition is usually placed before a superlative and after ὡς or ὅτι qualifying the superlative: ““ὡς ἐπὶ πλεῖστον τοῦ ὁμί_λου” over the very greatest part of the throng” T. 2.34. πολύ, πάνυ, μάλα may precede the preposition and its case: ““πολὺ ἐν πλείονι αἰτίᾳ” with far better reason” T. 1.35.