1数词的用法及训练数词是表示数量多少或顺序先后的词。分为基数词和序数词。(一)基数词1.表示数量多少的词是基数词,如:one,two,three等。2.数词的构成1)从1-12分别由从one到twelve,12个各不相同的词表示。one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve2)从13-19均以后缀-teen结尾。thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen3)从20-90的整十数词均以后缀-ty结尾。表示“几十几”时,个位和十位之间需加连字符。twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety21twenty-one32thirty-two43forty-three4)整百数由1—9加hundred构成。100one(a)hundred500fivehundred5)整百数和整十数之间由and连接,十位与个位之间要加连字符“-”。如果十位数为零,那就在百位和个位之间用and连接。101onehundredandtwo245twohundredandforty-five6)千thousand百万million十亿billionExercise:写出下列数字12142040901940060035783056782、序数词序数词表示排列顺序,如first,second,third等。构成规则:1)序数词第一、第二和第三为first,second和third,其他序数词的构成是在基数词后加th。例如:22)fifth(第五)、eigth(第八)、ninth(第九)和twelfth(第十二)在拼法上有变化。first,second,third,fourth,fifth,sixth,seventh,eighth,ninth,tenth,twelfth,thirteenth,fourteenth,3)二十、三十等基数词变为序数词时,要把y变成ie再加-th。例如:twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,eightieth,ninetieth4)基数词几十几变成序数词时,表示几十的数词不变,只把表示几的基数词变成序数词。例如:twenty-one→twenty-firstforty-five→forty-5).序数词的缩略形式是由阿拉伯数字加序数词的最后两个字母构成。例如:1st,2nd,3rd,4th,21st6)序数词前必须加定冠词theThefirsttimeIcametoChina,Ilikeditverymuch.我第一次来中国,我就非常喜欢这个国家。第一总是比第二好。Shewillchoosethethird.她将选择第三。Exercise:把下列基数词改成序数词。onetwothreefivenineeightfourteentwentythirty-five3.数词的应用1)时刻的表示法A、表示几点钟用基数词加可以省略的o'clock5:00读作fiveo'clock或fiveB、半点的表示法表示半点钟时,用“钟点数+thirty”或“half+past+钟点数”表示2:30twothirty/halfpasttwo8:30eightythirty/halfpasteighty3C、“几点几分”的表示法(1)用“钟点数+分钟数”表示7:10seventen9:40nineforty(2)分钟数在30分钟以内的,用“分钟数+past+钟点数”表示,意为“几点过几分“7:10tenpastseven10:15fifteenpastten/aquarterpastten(3)分钟数超过30分钟的,用“(60-分钟数)+to+下一个钟点数”表示,意为“差几分到几点”10:40twentytoeleven2:45fifteentothree/aquartertothreeExercise:用英语表示下列时间10:058:3012:101:155:479:233:5111:496:007:222)编号的表示法编号既可以用序数词,也可用基数词。thetenthlessonLessonTen第十课thefiftiethpagepage50第五十页有的编号习惯上常用基数词。例如:Room321(读作threetwoone)321号房间Tel.No.4013586(读作Telephonenumberfour0onethreefiveeightsix)电话号码3)年、月、日的表示法英语中表示日期的顺序通常为月日年或日月年。1、月、日的表示法4“月”用英语中表示月份的名词,“日”用基数词或序数词表示都可以。7月8日July8(Julyeight)/July8th(Julytheeighth)10月1日October1(Octoberone)/October1st(Octoberthefirst)2、年的表示法1983→nineteeneighty-1601→sixteenandone或965→ninesixty-five3、年、月、日的表示法1986年9月1日September1st,1986/1stSeptember,19862011年8月8日August8,2011/8thAugust,2011Exercise:用英语表示下列日期11月1号2月10号5月22号9月17号10月3号12月19号四、课堂练习1)根据括号中的数字填写合适的序数词或基数词(写单词)。1、Billis(14)yearsold,heisinClass(2)Grade(6).2、Mybirthdayisonthe(3)ofMarch.3、Septemberisthe(9)monthinayear.4、Whichboyisthinner,the(1)oneorthe(2)one?5、Thereare(55)studentsinourclass.2)单项选择5()1.Thereare___________daysinayear.A.threehundredandsixtyfiveB.threehundredandsixty-fiveC.threehundredsandsixtyfiveD.threehundredsandsixty—five()2.Dannylivesin__________.A.room404B.Room404C.404roomD.404Room()3.Jimisin__________.A.classone,gradesixB.gradeone,classsixC.ClassOne,GradeSixD.GradeOne,ClassSix()4.Thebikecostme_________yuan.A.fivehundredfortyB.fivehundredsfourtyC.fivehundredandfortyD.fivehundredfourty()5.Mytelephonenumberis____________.A.eightyeighttwofortyfourzeronineB.eighteighttwodoublefourOnineC.eightyeighttwoforty-fourzeronineD.eighteighttwofourfourzeronine()6.Isthereanyfoodforus_________?A.tenB.tenthC.thetenthD.theten()7.Maryis_________girl.A.an8yearoldB.8一years—oldC.the8yearsoldD.an8一year—old()8.—Whatdayistoday?—___________A.JuneB.TuesdayC.ItishotD.It’sfine()9.—What’sthedatetoday?—___________A.It’sSaturdayB.It’sJulyC.It’sfineD.It’sJuIy15()10.—Whattimedoyougetupeveryday?A.It’sseveno’clockB.Seveno’clocktimeC.AtsevenD.Onseven五课后作业1.Thereare___________daysinayear.A.threehundredandsixtyfiveB.threehundredandsixty-fiveC.threehundredsandsixtyfiveD.threehundredsandsixty—five()2.Dannylivesin__________.A.room404B.Room404C.404roomD.404Room()3.Jimisin__________.A.classone,gradesixB.gradeone,classsixC.ClassOne,GradeSixD.GradeOneClassSix()4.Thebikecostme_________yuan.A.fivehundredfortyB.fivehundredsfourtyC.fivehundredandfortyD.fivehundredfourty()5.Mytelephonenumberis____________.A.eightyeighttwofortyfourzeronineB.eighteighttwodoublefourOnineC.eightyeighttwoforty-fourzeronineD.eighteighttwofourfourzeronine()6.Isthereanyfoodforus_________?A.tenB.tenthC.thetenthD.theten()7.Maryis_________girl.A.an8yearoldB.8一years—old6C.the8yearsoldD.an8一year—old()8.—Whatdayistoday?—___________A.JuneB.TuesdayC.ItishotD.It’sfine()9.—What’sthedatetoday?—___________A.It’sSaturdayB.It’sJulyC.It’sfineD.It’sJuIy15()10.—Whattimedoyougetupeveryday?A.It’sseveno’clockB.Seveno’clocktimeC.AtsevenD.Onseven