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时间介词in/on/at,口诀,年月季要用in，周几几号要用on。午夜黄昏用at，也可用在时分前。,年月季要用in in 1992, in January；in summer；in spring；in autumn；in winter上午下午又是in in the morning；in the afternoon；in the evening,1、用in的时间短语有：,2、用on的时间短语有：,周几几号要用on（具体的某一天）on Monday；on Friday, on that day, on June 1st；on 23rd March；on Wednesday evening；on Sunday afternoon,3、用at的时间短语有：,午夜黄昏用at at noon； at night；也可用在时分前at ten oclock; at half past eight; at lunch time；at tea time,