1.at, in, on(~에) (1) at -à 시간상의 표시 at dawn(새벽에) at noon(정오에), at sunset(해질녘에), at night(밤에) at seven (o’clock), at the beginning(end) of~(~의 초(말)에), at the age of~(의 나이에) * He died in the accident at (the age of) 20 (그는 20십의 나이에 사고로 죽었다) (2) in -à 시간상의 표시:세기,년,계절, 월,오전,오후 등 in the 19th century(19세기에), in 2003(2003년에), in summer(여름에), in January(1월에), in the morning(아침에), * I get up early in the ..