教育专题：序数词

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,基数词变序数词加,th,1,、,2,、,3,特殊记,，,9,去,e,，,8,减,t,f,来把,ve,替，,y,要变,ie,几十几只变个位就可以。,表示次序的数词叫序数,词，是,由基数词变化而来的。,1 one-,first,2 two-,second,3 three-,third,four-fourth,five-fifth,six-sixth,seven-seventh,eight-eighth,nine-ninth,ten-tenth,eleven-eleventh,twelve-twelfth,thirteen-thirteenth,fourteen-fourteenth,fifteen-fifteenth,序数词是由基数词后加-,th,变化而来。,几个特殊变化的序数词,fi,ve,-fi,f,th,twel,ve,-twel,f,th,eight-eight,h,nin,e,-nin,th,基变序有规律，词尾加上th，特殊例子特殊记,整十的序数词把,y,变成,ie,加,-,th,1 twent,y,-twent,i,eth,2 thirt,y,-thirt,i,eth,3 fort,y,-fort,i,eth,4 fift,y,-fift,i,eth,写出,sixty seventy eighty ninety,的,序数词,整十的序数词,你对了吗？,1.Sixty-sixti,eth,2.,seventy-seventi,eth,3.eighty-eighti,eth,4,ninety-nineti,eth,几十几的序数词，十位数,不变，个,位数变成序数词。,1.twenty-,one,21-twenty-,first,21,st,2.twenty-,two,22-twenty-,second,22,nd,请写出23 24 31 的序数词。,