???????? ???? ? ??? ?? ?? ???????????? ???? ??? ??? ??...?????????? ???????????? ???? ??????...If a grammatical principle that is definitely added to ????can be a vowel ??and there's no other selection other than a vowel ??then that grammatical theory can not be added to ?????????? ???? ?? ???? ??? ?? ?? ?????? ?????? ?????? ???? ???????? ?????????