初中英语语法--表示时间的介词on,in,at

PREPOSITIONSOFTIME:AT,IN,ONWeuse:atforaPRECISETIMEIhaveameetingat9am.Theshopclosesatmidnight.Janewenthomeatlunchtime.at3o'clockat10.30amatsunriseatbedtimeatdinnertimeatnoonatthemomentatsunsetWeuse:inforMONTHS,YEARS,CENTURIESandLONGPERIODS.InEngland,itoftensnowsinDecember.DoyouthinkwewillgotoJupiterinthefuture?Thereshouldbealotofprogressinthenextcentury.intheSummerinMayintheIceAgeinthepast/futureinthe1990sinthenextcenturyin1990inSummerWeuse:onforDAYSandDATESDoyouworkonMondays?Herbirthdayison20November.WherewillyoubeonNewYear'sDay?onSundayonSundayonTuesdaysonTuesdayson6Marchon6Marchon25Dec.2010on25Dec.2010Noticetheuseoftheprepositionoftimeatinthefollowingstandardexpressions:ExpressionExampleatnightThestarsshineatnight.attheweekend*Idon'tusuallyworkattheweekend.atChristmas*/EasterIstaywithmyfamilyatChristmas.atthesametimeWefinishedthetestatthesametime.atpresentHe'snothomeatpresent.Trylater.PrepositionsoftimeNoticetheuseoftheprepositionsoftimeinandoninthesecommonexpressions:inoninthemorningonTuesdaymorninginthemorningsonSaturdaymorningsintheafternoon(s)onSundayafternoonsintheevening(s)onMondayeveningWhenwesaylast,next,every,thiswedonotalsouseat,in,on.IwenttoLondonlastJune.(notinlastJune)He'scomingbacknextTuesday.(notonnextTuesday)IgohomeeveryEaster.(notateveryEaster)We'llcallyouthisevening.(notinthisevening)Remember:inforlargerperiodsoftime.onforsmallperiodsoftime.atforpreciseperiodsoftime.