序数词ordinalnumber授课老师：张白美MichelleLet'senjoyapieceofmusicandreviewnumberstogether•TenlittleIndians数词可分为基数词(cardinalnumbers)和序数词(ordinalnumbers)•one,two,three,ten...等表示数目多少的叫基数词，基数词可以用来表示数目、时间、年龄、价格、班级、电话号码、公车等。•e.g.Therearefortystudentsinourclass.••Wegetupatsixo'clock.••Iamnineyearsold.••Ahamburgeristendollars.••IaminClassfourGradethree.••telephonenumber204-2244读作twozerofourtwotwofourfour••Bus(No.)11Howmany+复数+arethere？“有多少？”•Howmanyclassroomsarethereinyourschool?•Twelve.•Therearetwelve.•Therearetwelveclassroomsinmyschool.•Howmanystudentsarethereinyourclass?•Howmanyseasonsarethereinayear?躲炸弹Bombgame•游戏说明：老师将一个数字单词设为炸弹，然后开始单词操练，点到“炸弹”(3的倍数)时学生不能跟读，而应抱头趴在桌上并说‘Bomb'.Areyouready?•onetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentytwenty-onetwenty-twotwenty-threetwenty-fourtwenty-fivetwenty-sixtwenty-seventwenty-eighttwenty-ninethirty...What'sordinalnumber?什么叫序数词？•表示“第几”顺序的词叫序数词。一般与与之相应的基数词加词尾-th构成。请将基数词转换成序数词onetwothreefourfivesixseveneightninetenfirstsecondthirdfourthfifthsixthseventheighthninthtentheleventwelvethirteenfourteenfifteentwentythirtytwenty-onetwelfthtwentieththirtiethtwenty-first序数词有时用缩写形式•first---1st•second---2nd•third---3rd•fourth---4th•twenty-first---()•forty-third---()•fifty-fifth---()•sixty-second---()序数词有时用缩写形式•first---1st•second---2nd•third---3rd•fourth---4th•twenty-first---(21st)•forty-third---(43rd)•fifty-fifth---(55th)•sixty-second---(62nd)基数词序数词序数词缩写twenty-onetwenty-first21sttwenty-twotwenty-second22ndtwenty-threetwenty-third23rdtwelvetwelfth12thtwentytwentieth20th…thirtythirtieth30thfivefifth5theighteighth8thnineninth9thonefirst1sttwosecond2ndthreethird3rd基数词和序数词对照，你能看出什么规律吗？一、二、三，特殊记,词尾字t,d,d；th要从四加起；六、七同四守规律;八少t,九去e；f来把ve替,ty变成tie;若是遇到几十几，只变个位就可以。基数词变序数词的规律是：Writetherightformofthewords.写出下列单词的正确形式.1.twelve(序数词)________________2.thirteen(序数词)__________________•3.ninth(基数词)_________________4.eighteenth(基数词)________________•5.second(基数词)_______________6.three(序数词)____________________•7.fifth(基数词)_________________8.one(序数词)______________________•9.nineteen(序数词)______________10.twenty-four(序数词)______________•11.thirty(序数词)_________________12.forty-second(基数词)_______________•13.fiftieth(基数词)________________14.thirty-one(序数词)__________________•15.twenty(序数词)________________16.twenty-three(序数词)_______________Checkanswers.1.twelve(序数词)(twelfth)2.thirteen(序数词)(thirteenth)•3.ninth(基数词)(nine)4.eighteenth(基数词)(eighteen)•5.second(基数词)(two)6.three(序数词)(third)•7.fifth(基数词)(five)8.one(序数词)(first)•9.nineteen(序数词)(nineteenth)10.twenty-four(序数词)(twenty-fourth)•11.thirty(序数词)(thirtieth)12.forty-second(基数词)(forty-two)•13.fiftieth(基数词)(fifty)14.thirty-one(序数词)(thirty-first)•15.twenty(序数词)(twentieth)16.twenty-three(序数词)(twenty-third)4.百、千、万的序数词由hundred、thousand、million等加-th，前面加相关的基数词构成。onehundredthtwothousandththreemillionthAtt...
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