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4. ????????????,???270 ??????25 ?, ?????. ???300 ?????? ... ??LLN(????)??????.
??????????????????1920?9?????????????????? ????????????????????? ?????????????????????????? ??? ... ???????????? - ?????????????????????. ?????????????????????. ?????????????????????. ?????????????????????. ????????????????????????????????????????????????????????. ???????????????????????. ???????????????????? ... ???????????????????????????????????????. ????? 1920??????????????. ????????????????? ????. ?? ... ??????????????????????'??'????????????????????????????. ?????????????????????????????????????????????. ?????????????????????????????????????????????????????????????. ?????????????????????????? ... ????????????????* ????? 1949 ???????????????????????????????????. ????????????????????????????????????? ... ?????????????????????1949?1955 ...???????????????????????????????????????????. ?????????????????????????????????????? ... ???- ????????????????????(present participle)???????. (past participle)?????,??????-ing participle ?-ed participle? ???????????? 1? ... ?????????1 ?·???2????????????????d????t???????????? ???? ... spent[spent] spent[spent]. ??. ?3???? ought ? ought. ????. ?? ... ??????????????be ?????were?. ??????? had +????. ?????????? would/could+????. I wish I were as strong as you. I wish I had ... ??????????4. ??????????. ?1?????????????????????????????????be(am/is/are) + ?????. ????????