как (это делается) в случае, если бы — as would be the case if
и в том, и в другом случае — in either case
как в случае (чего-л., с чем-л.) — as with smth.
во втором случае — in the latter case
в особых случаях — in special situations / cases
в обоих случаях — in either case, in both cases
в случае — in case of, in event of / that
на всякий случай — to be on the safe side, just to be / make sure
на всякий пожарный случай — just in case, just to be absolutely sure
во всяком случае — in any case, anyhow, anyway
при случае — as required, if / when necessary; given the opportunity, when one has the chance
в случае чего — if something happens
ни в коем случае — not on any account, not under any circumstances
на крайний случай — to leave / keep smth. as a last resort
на первый случай — to start / begin with
по такому / этому случаю — that being the case, in view of that