- ??? ????(????? ??)???? ?? ????????? ?? ???? ??.The two most typical grammatical concepts the place this occurs is when conjugating in past times or current tenses. For examples:??? ?? ?? ?????? ?? ?? ????? ??? ?? ?? - ?????? ?? - ?? ???????? ?? ???????? ?? ?? ???????? ??????????? ??????????????????????'????' ??? ?????? ?? ??????. ?? ???? ????? ?