?????? ??????????????????? ?? ??????? ???????? ??? ???????????? ???? ???? ????? ?????? ????????? ??If a grammatical principle that may be extra to ????is actually a vowel ??and there is no other choice other than a vowel ??then that grammatical basic principle cannot be included to ????- ???? ??: ??, ??, ??(??, ???????? ??), ??????, ??, ?????- ????