?????? ??????????????????? ?? ??????? ???????? ??? ???????????? ???? ???? ????? ?????? ????????? ??If a grammatical basic principle that is certainly added to ????is usually a vowel ??and there's no other choice in addition to a vowel ??then that grammatical theory can not be additional to ????- ???? ??: ??, ??, ??(??, ???????? ??), ??????, ??, ???