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1、介词 on at in+时间 的用法,at 时间最短，一般表示点时间，具体的某个时刻,1.at six oclock2.at 8:30习惯用语：at night at noon,On 在具体某一天 包括 具体某一天的上午 下午 和晚上,1.On Mothers Day,I give carnations to my mother.2.On Monday/Friday/Saturday3.On Tuesday afternoon On Sunday morning(evening)4.On July 1,1999 On March 7On+星期(1-7)On+年，月，日/年，日/月，日,In 时
2、间范围大（一段时间）,1.in spring/summer/autumn/winter2.in May3.in the morning/afternoon/evening 4.in September/May/June/July5.in a year in a week1 in+四季2 in+月份3 in+年/年，月/月,At 几点钟；In 一段时间；On 某一天,I go to school _ seven oclock.I usually play badminton _ Sunday afternoon.The buildings shadow is long _ the afternoon.The sun is high in the sky _ noon.We have lunch _ 11:35 at school every day._ Monday,I have six classes.My birthday is _ the first of May._ autumn,we can eat much fruit.Summer comes _ June,July and August._ Childrens Day,we play games in the classroom.,at,in,on,On,at,on,at,In,in,On,
