???????????? ??????? ???????????? ??? ??????? ?? ?? ???? ???? ???? ???????? ?? ???? ???????????? ??·????? ???????????????? ?? ???????????? ?????????? ?? ???????? ?????????????? ?~??- ?? ???? - ???? ???? - ?? - ?????- ???? - ???? - ?? ?????- ????In exercise, the word “????can improve to another verb to indicate that just one does some thing when