数词1数词的分类2基数词和序数词的构成与用法3其他数词的用法目录数词基数词 数词的分类序数词 表示顺序表示数目one,two,threefirst,second,third0-12单独记eg.zero,one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve13-19词尾直接在数词3-9后加teen除了特殊的3个：13-thirteen,15-fifteen,18-eighteeneg.14:fourteen,17:seventeen,19:nineteen基数词的构成20-90整十位数直接在数词2-9后加ty除了特殊的4个：20-twenty,30-thirty,40-forty,50-fiftyeg.60:sixty,70:seventy,90:ninety20-99之间的非整数，由十位数加个位数构成，中间用连字符号eg.21:twenty-one,98:ninety-eight基数词的构成百位数含十位数和个位数时，百位数与十位数之间用and连接，也可省略，但百位数加个位数时，and一般不省去eg.247:twohundred(and)forty-seven,202:twohundredandtwo四位数或者四位数以上的基数词的拼写规律是用逗号从右往左每三位加一个逗号，第一个逗号前为千(thousand)，第二个逗号前为百万(million)，第三个逗号前为(十亿)billioneg.274,350twohundredandseventyfourthousand,threehundredandfifty基数词的构成表示数量eg.thirtytrees表示年龄,年份和年代eg.attheageof15，in2013,inhisfifties,inthe1960s表示顺序eg.ClassFive,RoomOne基数词的用法Childrenscellphones,forthosebetweentheagesof_and_,comeincolorfulstyles.A.6,12B.6s,12sC.6th,12thD.6s,12s例题表示时刻past表示”几点过几分”，to表示“差几分到几点”eg.一点五十八(1:58):onefifty-eight/twototwo，三点零二(3:02):threeotwo/twopastthree，九点半(9:30):ninethirty/halfpastnine基数词+单数可数名词作定语eg.tenminutewalktenminuteswalk基数词的用法Whattimewillthegamestart?Attenoclock,andnowmywatchsays_.Itwontbelong.A.ninethirty-fiveB.thirty-fivepastnineC.thirty-fivetotenD.nineandthirty-five例题表示确数和概数确数：基数词hundred/thousand/million/billion可数名词复数eg.fivehundredchairs概数：hundreds/thousands/millions/billionsof名词eg.thousandsofpeopleanother基数词名词,基数词more名词表示在一定基础上再增加一定的数量eg.twomoreorangesanothertwooranges基数词的用法Thestorekeepersaidtome,“Ifyoucansell_boxesofthiscandyaday,youcanhavethisjob.”A.athousandofB.thousandsC.athousandD.thethousandth例题序数词1-3为特殊变化eg.第一：first，第二：second，第三：third序数词4-19在相应基数词词尾加-th构成除了特殊的4个：第五:fifth,第八:eighth,第九:ninth,第十二:twelftheg.第四:fourth,第十:tenth,第十六:sixteenth序数词的构成序数词20-90整十位数将相应基数词词尾-y变-i,加-etheg.第60:sixtieth,第70:seventieth,第90:ninetieth20-99之间的非整数的序数词，十位数用基数词表示，个位数用序数词表示，中间用连字符号eg.第99：ninety-ninth，第72：seventy-second序数词的构成整数的百至十亿的序数词直接在基数词词尾加-theg.第一百:(one)hundredth,第一千:(one)thousandth,第一百万:(one)millionth,第十亿:(one)billionth百至十亿的序数词，若包含十位数与个位数，只将最后一个数变为序数词eg.第2425:twothousand,fourhundred(and)twenty-fifth序数词的构成表示顺序在用序数词表示顺序时，在序数词前加冠词the，序数词后的名词用单数eg.thefifthfloor表示日期日期按“日，月，年”/“月，日，年”的顺序表示日期可用阿拉伯数字，也可用缩略形式的序数词eg.2010年5月1日:Maythefirst,twothousandandten序数词的用法YoucancollectyourprintsonWednesday.Thats_.A.theMay13B.13thforMayC.13ofMayD.13thMay例题表示分数分子用基数词，分母用序数词；分子大于1，分母加-seg.3/4:threefourths表示倍数“一倍”是once；“两倍”是twice；表示“三倍”或“三倍以上”的倍数用“数字times”eg.十倍:tentimes序数词的用法Weweregiven3months,butmostofthestudentsfinisheditinlessthan2months,_thetime.A.twothirdB.twothirdofC.twothirdsD.twothirdsof例题表时间数词前加every，表示“每一段时间或每隔一段时间”eg.每10天/每隔9天:everytendays=everyninthday与数词有关的词和短语eg.half一半;second秒;aquarter四分之一;several几个;afew几个;adozen一打;ascore二十个;halfanhour半小时；twoorthreehourstwohoursorthree两三个小时；fourandahalfyearsfouryearsandahalf四年半其他数词的用法用所给词的适当形式填空1Theyliveonthe_(five)floor.2Decemberisthe_(twelve)monthoftheyear.3Onmysisters_(nine)birthday,Igaveherausefulbook.4_(hundred)ofpeoplecomeheretoreadbooksonweekends.5Abouttwo_(thousand)treeshavebeenplantedalongtheriver.6.Three_(four)ofthestudentsinourclasslikebasketball.练习fifthtwelfthninthHundredsthousandfourths用所给词的适当形式填空7Howoftendoyougotothemountain?_(two)amonth.8Wednesdayisthe_(four)dayofaweek.9FathersDayisonthe_(three)SundayofJune.10Theyliveonthe_(twentysix)floorofthetallbuilding.11Inthe_(eight)picture,youcanseemanyyoungtrees.12Helefthisparentswhenhewas_(seven)yearsold.练习Twicefourththirdtwenty-sixtheighthseven