???? ???????(????)????????????? ???? ????????.??????? ???? ??? ???????????? ???????? ??????????. ??????? ???? ??????????.If a grammatical basic principle that's additional to ????is often a vowel ??and there's no other selection other than a vowel ??then that grammatical theory cannot be extra to ???????? ????? ???? ???? ?? ?? ???? ???? ??? ??????