???? ???????(????)????????????? ???? ????????.???? ???? ??? ??? ??...?????????? ???????????? ???? ??????...???? ?????????????? ????, ?? ?? ?? ???? ??? ????? ????If a grammatical basic principle which is included to ????can be a vowel ??and there is no other selection other than a vowel ??then that grammatical principle can not be extra to ?????? ??