Herbert Weir Smyth, A Greek Grammar for Colleges

a. (inf.) Κῦρός γε, εἰ ἐβίωσεν, ἄριστος ἂν δοκεῖ ἄρχων γενέσθαι it seems probable that Cyrus, if he had lived, would have proved himself a most excellent ruler ( = ἂν ἐγένετο) X. O. 4.18, ὥστε καὶ ἰδιώτην ἂν γνῶναι so that even a common man could have understood ( = ἂν ἔγνω) X. A. 6.1.31, τί ἂν οἰόμεθα παθεῖν; what do we think our fate would be? ( = τί ἂν πάθοιμεν;) X. A. 3.1.17.

b. (part.) ὁρῶν τὸ παρατείχισμα ῥᾳδίως ἂν ληφθέν seeing that the counterwall could easily be captured ( = ἂν ληφθείη) T. 7.42, Ποτείδαιαν ἑλὼν καὶ δυνηθεὶς ἂν αὐτὸς ἔχειν, εἰ ἐβουλήθη, παρέδωκεν after he had seized Potidaea and would have been able to keep it himself, had he wished, he gave it up to them ( = ἐδυνήθη ἄν) D. 23.107, ““οὔτε ὄντα οὔτε ἂν γενόμενα λογοποιοῦσιν” they fabricate stories which neither are, nor could be, true” T. 6.38 ( = ἃ οὔτε ἔστιν οὔτε ἂν γένοιτο).