Prepositions:A

SimpleGuideforHowtoUsein,on&atLearningwhentousevariousprepositionsinanotherlanguagecancausequiteaheadache.Luckily,inEnglish,wecanidentifymanyspecificsituationsinwhichtheprepositionsin,on,andatareusedinordertofigureoutwhenitisappropriatetouseeachone.Twoofthemostcommoncontextsinwhichin,at,andonareusedinvolveidentifyingwheresomeoneorsomethingis(place)andwhensomethinghappened(time).in,on,at的地點(diǎn)用法Preposition Situations Examplesatataveryspecificpoint,location,orplaceI’mworkingatthebakery.Theshopisat455MainStreet.Someoneisatthedoor.ononasurfaceExceptions:generalstreetnamesandclosetoariverThepaintingisonthewall.Herringisonhermiddlefinger.IliveonGroveStreet.ininanenclosedspace,orageneralareathatcontainsbordersorboundariesShehasapennyinherpocket.Ileftmywalletinthecar.Thechildrenareinthegarden.TheyliveinNewYorkCity.Note:Whenreferringtobuildingsorotherconfinedareas,bothprepositionsat

andin

canbeused,dependingonthecontext.Ifyouwouldliketodescribethegenerallocationofwheresb/sthis,youshoulduseat.Forexample,Maryisattheschool.However,ifyouneedtoemphasizethatsb/sthisinsidethebuildingorarea,youcanusein.Forinstance,Maryisintheschool.根據(jù)不同情境選擇介詞，通過in和at的基本含義具體翻譯就知道有無差別了。in,on,at的地點(diǎn)用法試比較（翻譯）：inthecorner（ofthewall），atthestreetcorner,onthecornerofthedesk,在角落里，在墻角，在街道拐角處，在桌角上，記住單詞的基本含義，通過翻譯就很容易區(qū)分了in,on,at的時(shí)間用法①固定短語：inthemorning/afternoon/evening在早晨/下午/傍晚atnoon/night在中午/夜晚,（不強(qiáng)調(diào)范圍，強(qiáng)調(diào)的話用duringthenight）earlyinthemorning=intheearlymorning在大清早lateatnight在深夜ontheweekend在周末

（英式用attheweekend在周末，atweekends每逢周末）onweekdays/weekends在工作日/周末，onschooldays/nights在上學(xué)日/上學(xué)的當(dāng)天晚上in,on,at的時(shí)間用法②不加介詞this,that,last,next,every,one,yesterday,today,tomorrow,tonight，all，most等之前一般不加介詞。如，thismorning今天早晨（on）thatday在那天（thatday更常用些）lastweek上周

nextyear明年thenextmonth第二個(gè)月（以過去為起點(diǎn)的第二個(gè)月，nextmonth以現(xiàn)在為起點(diǎn)的下個(gè)月）everyday每天

onemorning一天早晨

yesterdayafternoon昨天下午tomorrowmorning明天早晨allday/morning/night整天/整個(gè)早晨/整晚mostofthetime（在）大多數(shù)時(shí)間in,on,at的時(shí)間用法Preposition Situations ExamplesatSpecificTimesHours/minutesofthedayTimesofday(e.g.dawn,midnight,noon,sunrise,bedtime)We’llmeetyouat6o’clock.Theshowstartsat4:45.Ihatedrivingatnight.onSpecificDaysandDatesDates,Daysoftheweek,Weekends+Holidays(NamE),BirthdaysThepartyisonMay5th.TheyworkoutonMondays.Irelaxontheweekend.HeleftonChristmasday.inMoreGeneralTimesMonths,Seasons,Years,Centuries,TimePeriods,Past/Future,FutureTimes,ExceptionforTimesof