?? ??????)??????? ?????? ?? ????, ??, ?? ?? ????. '(??, ?? ??) ??????'?? ???????? ???? ????????? ???? ???????????????????????????? ??????.If a grammatical principle that is definitely included to ????can be a vowel ??and there's no other solution apart from a vowel ??then that grammatical basic principle can't be extra to ?????? ???? ????? ??(??