基数词变序数词规律

1基数词变序数词规律一．口诀：一、二、三，特殊记；th从四起；八加h，九去e；ve要用f替；整十基数变序数，先把ty变成tie；要是遇到几十几，前半基数后半序。基数词序数词1one第一first2two第二second3three第三third4four第四fourth5five第五fifth6six第六sixth7seven第七seventh8eight第八eighth9nine第九ninth10ten第十tenth11eleven第十一eleventh12twelve第十二twelfth13thirteen第十三thirteenth14fourteen第十四fourteenth15fifteen第十五fifteenth16sixteen第十六sixteenth17seventeen第十七seventeenth218eighteen第十八eighteenth19nineteen第十九nineteenth20twenty第二十twentieth21twenty-one第二十一twenty-first22twenty-two第二十二twenty-second23twenty-three第二十三twenty-third基数词序数词34thirty-four第三十四thirty-fourth45forty-five第四十五forty-fifth56fifty-six第五十六fifty-sixh99ninety-nine第九十九nineth-ninth100hundred第一百hundredth3二、巩固练习：(一)写出下列词的序数词形式。1.one2.two3.six4.five5.nine6.twelve7.eight8.twenty-one（二）写出下列单词的基数词形式。1.third2.fourth3.tenth4.twentieth5.nineteenth6.thirty-first_（三）根据句子意思填空。1.Children’sDay（儿童节）isontheofJune（六月）.2.Therearemonths（月）inayear(年).3.Teacher’sDay(教师节)isontheofSeptember（九月）.4.Threeplus(加)sixis.（四）选择填空。()1.Mycousin’sbirthdayinontheofOctober.A.threeB.firstC.thesecond()2.Whatdateisittoday?It’sofApril.A.twelfthB.the12thC.12th()3.Therearedaysinaweek.A.thesevenB.seventhC.theseventhD.seven()4.Sundayisthedayofaweek.4A.oneB.firstC.second()5.Twenty-eightminus(减)sixis.A.thetwenty-secondB.twenty-twoC.twenty-second()6.Fourplus(加)istwelve.A.sevenB.eightC.nine