Herbert Weir Smyth, A Greek Grammar for Colleges

ἀλλὰ γάρ 2816; on ου᾽ γὰρ ἀλλά, see 2767.

ἀλλὰ . . . γε but at any rate.

ἀλλά γέ τοι (τοί γε) yet at least, yet be sure.

ἀλλὰ δή well then.

ἀλλ᾽ ἦ; why how? can it really be that? what, can it be true? Here ἀλλά marks surprise, while ἦ asks the question.

ἀλλὰ μέντοι nay, but; well, however; yet truly. On ου᾽ μέντοι ἀλλά, see 2767.

ἀλλὰ μήν nay, but; but then; but surely. Often to introduce an objection, to reject an alternative, often merely to introduce a new idea or to resume an interrupted thought. On ου᾽ μὴν ἀλλά, see 2767.

ἀλλ᾽ ὅμως but still. Often without a verb, to introduce the reply to an objection.

ἀλλ᾽ οὐδέ is sometimes used elliptically, as in ὑπὲρ . . . ὧν οὗτος ἀπήγγειλε πρὸς ὑ_μᾶς ἀλλ᾽ οὐδὲ μι_κρόν nay, there is not even ever so little (not only not a great deal but not even a little) concerning which he reported to you D. 19.37. ἀλλ᾽ οὐδὲ μὲν δή is often used to reject an alternative.

ἀλλ᾽ οὖν (γε) but then, well then, well at any rate; stronger than δ᾽ οὖν.