4 Replies ・ Started by JSnow at 2019-06-30 06:48:35 UTC ・ Last reply by jakobd2 at 2019-07-27 18:49:37 UTC This is a discussion about 違う あ+う=おう I picked up somewhere that あ+う=おう was true But I guess that's not the case or maybe it's a rule of thumb with some exceptions ? Or does this rule only apply when to separate words, with those letters, are combined in a sentence, not to words themselves, mayhaps? Or is it completely baseless? Any feedback would be much appreciated : ) jakobd2 at 2019-06-30 09:29:39 UTC Never seen this. Do you have any examples or a source? Leebo at 2019-07-01 00:39:13 UTC Yeah, this isn't something I've ever heard of. lake at 2019-07-26 20:32:19 UTC From https://pomax.github.io/nrGrammar/#section-3-2-7-1-Dubitative_/_cohortative : The way in which the direct pseudo-future is constructed differs for the two verb classes: 五段 verbs get う added to the 未然形, but the combination of the 未然形 あ—row syllable and the う changes the pronunciation (as well as written form) to an お—row syllable instead, so か+う becomes こう, ま+う becomes もう, etc. To see why this happens we have to look back at classical Japanese, where the combination of an あ—row syllable and an う always changed the pronunciation to that of the corresponding お—row syllable; not just for 未然形 constructions, but for any written combination of the two. While the language reforms of the mid 20th century changed many of the rules for written language so that it would correspond to spoken language more, constructions involving the 未然形 have generally been left alone (another 未然形 'quirk' can be found in 五段 verbs ending on う, which becomes わ rather than あ). jakobd2 at 2019-07-27 18:49:37 UTC Hi lake, I don't see how the conjugation rules for the "direct pseudo-future" are related to the OP. To be honest I also don't understand how the OP is related to the word 違う, as there's no あう or おう inside it anyway. Log in to reply.