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,Letslearntwelvemonths(月份).,JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember,January,February,March,April,May,June,July,August,September,October,November,December,ebruary,Januaryor（或）F_,春节,PlantingTreeDay植树节,劳动节,archay,and,M,M,母亲节,ulyugust,J,A,SummerHolidays(暑假),and,ArmyDay,建军节,NationalDay,国庆节,ChristmasDay,NewYearsDay,新年,基数词变序数词歌基变序，有规律：词尾加上th（fourth，sixth）一、二、三，特殊记；结尾字母t，d，d（first，second，third）;八减t，九去e（eighth，ninth）;ve要用f替（fifth，twelfth）;ty将y变成i；th前面有个e。若是碰到几十几，前用基来后用序。,Learnthesenumbersandfindouttherules:,1stfirst2ndsecond3rdthird4th5th6th7th8theighth9thninth10th,fifth,一起找找规律,fourthsixthseventhtenth,foursixseventen,1one2two3three45five678eight9nine10,基数词,序数词,11eleven11theleventh12twelve12thtwelfth13thirteen13th14fourteen14th15fifteen15th16sixteen16th17seventeen17th18eighteen18th19nineteen19th20twenty20thtwentieth,thirteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth,fourteenth,序数词的用法：,1.序数词前一般要加定冠词the。如：Thefirstboyismybrother.,2.表示编号时，常把基数词放在名词后面来表示顺序，相当于“the+序数词+名词”。如：lessonfive=thefifthlesson,下一页,序数词的缩写,阿拉伯数字个位序数词的后两位字母：thirty-first31sttwenty-second22ndsixty-fourth64th你能写出下列序数词的缩写吗？437590,A:Whenisyourbirthday?,B:Mybirthdayisin.,A:Whichday?（哪一天？）B:ItsonJune2nd.,WhenisTeachersDay?,ItsSeptember10th.,WhenisNationalDay?,ItsOctober1st.,日期的表达date,Whatsthedatetoday?,Its_,December21st.,WhenisChristmasDay?,ItsonDecember25th,（1980.9.12),Whenishisbirthday?,HisbirthdayisonSeptember12th.,YaoMing,Whenisyourbirthday?,Itson_.,请写出下列数字的序数词。112233445512618879,
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