2015上海中考英语复习：介词

中考网

　　1、in, on, at表时间
        　　in "在某月(季节、年)等" eg:in 1996, in January, in summer
        　　固定词组：in the morning,       in a week,in a minute,in time, in the end
        　　on "用于指具体的某一天或专指某一天上午、下午或晚上等"
        　　eg:on Christmas Day, on the night of February 16
        　　at "用于具体时刻前和某些固定词组中"
        　　固定词组：  at seven, at the moment, at night, at last, at first, at noon,
        　　at times, at once,  at this time of the year,\at the beginning of,
        　　at the end of this month,
        　　at the same time
        　　注意：the day before yesterday和the day after tomorrow 前不用介词
        　　通过媒介 on /over the telephone,  on /over the radio,  on TV