?? ?????? ??? ???????????? ?????? ??????? ???????? ?????????? ??? ????.??????? ???? ??? ???????????? ???????? ??????????. ??????? ???? ??????????.???? ??????? ???????? ???????. ??? ???????If a grammatical principle which is extra to ????is really a vowel ??and there is no other alternative other than a vowel ??then that grammatical theory can not