οὐκ ἔστιν αἰσχρὸν ἀγνοοῦντα μανθάνειν → there is no shame in, not knowing, inquiring
adj.
On fixed terms: use P. and V. ἐπὶ ῥητοῖς. For the moment: use P. and V. ὁ αὐτίκα, ὁ παραυτίκα, P. ὁ παραχρῆμα.