时间名词前介词的用法一、用in的场合(1)表示“在某年/月/季节”这个含义时,须用介词in。例如:in1980.(2)表示“从现在起一段时间以后”时,须用介词in。例如:Theywillgotoseeyouinaweek.(3)表示“在某世纪”时,须用介词in.例如:Thismachinewasinventedintheeighteenthcentury.(4)表示”在早上、下午、晚上“须用介词in.例如:inthemorning/evening/afternoon二、用on的场合(1)表示“在具体的某一天”或“(在具体的某一天的)早上、中午、晚上”等,须用介词on。例如:onMay10th,1982,onarainymorning,onasummerafternoon.练习:Thisfestivalisacheerfuloccasion,for____thisday,thedeadaresaidtoreturntotheirhomesandtheyarewelcomedbytheliving这是个欢乐的日子,据说这一天,死者回家而活着的人欢迎他们Mother'sDayis______thesecondSundayofMay.It’sadaytothankmothers.Onthatdaymothersusuallygetflowersandcardsfromtheirchildren.(2)表示“在星期几”或“在星期几的早上、中午、晚上”等,须用介词on。例如:onSaturday,onSaturdaymorning,onweekdays在平时/周日(3)表示“在某一节日”时,须用介词on。例如:onMid-autumnFestival,onTeachers'Day.注意:当morning,evening,afternoon被of短语修饰,习惯上用in,而不用on.例如:intheearlymorningofSeptember10th在9月10的清晨;inthelateafternoonofSeptember12th在9月12日的傍晚。三、用at的场合(1)表示“某一具体时刻(即几点几分时)”,须用介词at。例如:atsix(2)用在特定的时候(时节、时机)时,须用介词at。例如:Theywerehappyatthattime.他们那时很幸福。(3)表示“在中午、在夜晚、在午夜、在周末(也可用on)”时,须用介词at。例如:atmidnight,at/onweekendsWhatdoyouoftendoatnoon?你中午经常做些什么?Youcanseemanystarsintheskyatnight.夜晚你能看到天空中有许多星星。(4)表示“在……岁”时,须用介词at。例如:Attheageofnine,theboycouldswimwell.在九岁的时候,这孩子就游泳游得很好了。四、用by的场合by+时间名词。意为:“到…时(已发生某事),此时谓语多用完成时;最晚、不迟于…,在…之前”。如:bynow/then/thistime/nextFriday/theendof/threeo`clock等。Bytheendoflastyear,anothernewgymnasiumhadbeencompleted.到去年年底,又有一座新体育馆峻工了。Thetrainleavesat6:00pm.SoIhavetobeatthestationby5:40pmatthelatest.火车下午六点开,所以最晚我得五点四十赶到车站。时间名词前不用介词的情况1.在today,tomorrow,yesterday,thedaybeforeyesterday,等表示时间概念的名词前一般不用介词。例如:1)Whatareyougoingtodotomorrow?2)Wehavehadsixlessonstoday.3)Wehadagoodtimethedaybeforeyesterday.2.由this,that,these,those等用于表示时间概念的名词前,前面往往不加介词。例如:1)Thatmorninghegotupveryearly.2)Whatareyoubusywiththesedays?3.由next,last,thenext,thelast等用于表示时间概念的名词前时,前面不用介词修饰。例如:1)Weplantedmanytreeslastspring.2)ShesaidshewouldpayatriptoSuzhouthenextmonth.3)TheverynexttimeIsawher,shewasworkinginLondon.4.在each,any,every,some,all等用于表示时间概念的名词前,一般不用介词来修饰。例如:1)Thebusesgoevery10minutes.2)Jackcoughedallnight.3)Wehavetogetupveryearlyevery/eachday.