- ??? ????(????? ??)???? ?? ????????? ?? ???? ??.????????? (??????) ?????? ?????????????????????? ??????????? ?????????? ???????? ?????? ?? ?????? ???? ????. ??, ?? ?? ??? ?? ?????????? ?? ?? ????If a grammatical principle that's extra to ????is usually a vowel ??and there is no other alternative besides a vowel ??then that grammatical principle ca