???? ???????? ????????? ???? ???? ?? ???The 2 most commonly encountered grammatical concepts where by this occurs is when conjugating in the past or current tenses. For examples:?? ???? ??????, ???? ???? ???? ?? ??? ??????.??????(??)??: ???????? ???????????? ??·???????(???????? ???????????, ??????, ???????? ?????? ????), ????????(???????????????