?? ???? ???????? ?????? ????????? ?? ??????.?? ??? ????????????? ???????? ??????. ??????? ?? ???? ?? ???????????????????? ???? ???? ?? ???? ?????? ??- ????????? ?? ???????????? ???? ????????? ????.The 2 most frequent grammatical concepts wherever this happens is when conjugating before or present tenses. For examples:?? ?? ?? ??????, ???? ?? ??????