What @johnwilliams_6 said
I can't give you the whole set of endings off the top of my head, precisely because that's the kind of rote-learning that SSi avoids; and if you look them up in anything but Gareth King's grammar (and possibly even there, to some small degree) you'll find there are small differences between the written forms and how we've actually heard it pronounced. So, to the best of my ability:
Future: byddaf i, byddi di, bydd o/e/hi -- but most written final -f are silent for most speakers unless they've got their best Chapel voice on, so SSi teaches you to say eithaf and difrif etc. without the -f (eitha' da, o ddifri'). Byddaf is no exception, so bydda' i sounds exactly like you'd expect byddai to sound. (I think f's in monosyllables are usually still pronounced, like haf, and some others -- but I'm not sure if, for example, I'm saying mis Hydref right, or if I should drop my f's more )
Conditional (and imperfect in literary): byddwn i, byddet ti, byddai fo/fe/hi -- which is the one we've got here, but the final -ai isn't pronounced as spelt -- it's more of just an 'uh' sound, like the word y or the y in the first syllable -- buh-dhuh, rather than buh-dhai.
I think that should be about right...