介词in,on,at在表示时间时的用法区别in时间长on某一点at时间短①in时间范围大(一天以上)如:inTanuary,inwinter,in1999;泛指在上午,下午,晚上,如:inthemorning(afternoon,evening).习惯用法:inthedaytime在白天。②on指在某一天或某一天的上午,下午,晚上,如:onMonday,onSundayafternoon,onJuly1,1999③at时间最短,一般表示点时间,如atsixo’clock,atthreethirty.习惯用法:atnight,atnoon,atthistimeofyear.in,on和at在表达时间方面的区别in表示在某年、某季节、某月、某周、某天和某段时间inayear在一年中inspring在春季inSeptember在九月inaweek在一周中inthemorningafternoonevening在上午下午傍晚但在中午,在夜晚则用atnoonnighton表示某一天或某一天的某段时间onMonday在周一onMondayafternoon在周一下午onMarch7th在3月7日onMarch7th,1998.在1998年3月7日onthemorningofMarch7th,1998.在1998年3月7日上午at表示某个具体时刻。ateighto’clock在8点钟atthistimeoftheyear在一年中的这个时候atthemoment在那一时刻atthattime在那时注意:在英语中,如果时间名词前用this,last,next等修饰时,像这样的表示,“在某时”的时间短语前,并不需要任何介词。例如:lastmonth,lastweek,thisyear,thisweek,nextyear,thenextday,thenextyear等。1.What’stheweatherlikeinspringsummerautumnwinterinyourcountry你们国家春天夏天秋天冬天的天气怎么样?in在年、月、周较长时间内inaweek在里面intheroom用某种语言inEnglish穿着inredon某日、某日的上下午onSundayafternoon在⋯⋯上面onthedesk靠吃⋯⋯为生liveonrice关于abookonPhysics〔误〕Wegottothetopofthemountainindaybreak.〔正〕Wegottothetopofthemountainatdaybreak.〔析〕at用于具体时刻之前,如:sunrise,midday,noon,sunset,midnight,night。〔误〕Don'tsleepatdaytime〔正〕Don'tsleepindaytime.〔析〕in要用于较长的一段时间之内,如:inthemorningafternoon,或intheweekmonthyear.或inspringsupperautumnwinter等等。〔误〕WevisitedtheoldmaninSundayafternoon.〔正〕WevisitedtheoldmanonSundayafternoon.〔析〕inthemorning,intheafternoon如果在这两个短语中加入任何修饰词其前面的介词都要改为on,如:onacoldmorning,onthemorningofJuly14th〔误〕Hebecameawritterathistwenties〔正〕Hebecameawritterinhistwenties〔析〕这句话应译为:他在20多岁时就成了作家。在某人的一段生活时间段中要用介词in来表示,而在具体岁数时用at来表示。〔误〕HewenttoNewYorktofindajobinsixteenyearsold.〔正〕HewenttoNewYorktofindajobatsixteen.〔析〕在具体年岁前用at,如:attheageof12,atyourage,等等。〔误〕Wewenttoswimintheriverinaveryhotday.〔正〕Wewenttoswimintheriveronaveryhotday.〔析〕具体某一天要用介词on,又如:onNewYear'sDay〔误〕I'mlookingforwardtoseeingyouonChristmas.〔正〕I'mlookingforwardtoseeingyouatChristmas.〔析〕在节日的当天用on,而全部节日期间用at,Christmas是圣诞节期间,一般要有两周或更长的时间。〔误〕Ihaven'tseeyouduringthesummerholidays.〔正〕Ihaven'tseenyousincethebeginningofthesummerholidays.〔析〕during表示在某一段时间之内,所以一般不与完成时搭配,如:Ivisitedalotofmuseumsduringtheholiday.而for表示一段时间,可以用于完成时,如:Ihaven'tseeyouforalongtime.而through用来表示时间时则为整整,全部的时间。如:Itrainedthroughthenight.而since则是表达主句动作的起始时间,一般要与完成时连用。〔误〕Atenteringtheclassroom,Iheardthegoodnews.〔正〕Onenteringtheclassroom,Iheardthegoodnews.〔析〕On加动名词表示一⋯⋯就。本句的译文应是:我一进入教室就听见这个好消息了。又如:onhearing⋯一听见,onarrival一到达就⋯⋯(on表示动作的名词)〔误〕Inthebeginningofthebook,therearesomeinterestingstories.〔正〕Atthebeginningofthebook,therearesomeinterestingstories.〔析〕atthebegining与attheend都是指某事物的开始与...