??/??/?? ?? ????? ??????????????????????? ?~??- ?? ???? - ???? ???? - ?? - ?????- ???? - ???? - ?? ?????- ?????? ???? ???????????????????????????? ??????.???? ????? ???? ???? ?? ?? ???? ???? ??? ?????? ?????????????????????????????.?????? ?????? ???????????? ???? ??_????????????? ?The two most typical grammatical rules in which this occurs is when