1-50序数词

1-50的序数词第1first1st第2second2nd第3third3rd第4fourth4th第5fifth5th第6sixth6th第7seventh7th第8eighth8th第9ninth9th第10tenth10th第11eleventh11th第12twelfth12th第13thirteenth13th第14fourteenth14th第15fifteenth15th第16sixteenth16th第17seventeenth17th第18eighteenth18th第19nineteenth19th第20twentieth20th第21twenty-first21st第22twenty-second22nd第23twenty-third23rd第24twenty-fourth24th第25twenty-fifth25th第26twenty-sixth26th第27twenty-seventh27th第28twenty-eighth28th第29twenty-ninth29th第30thirtieth30th第31thirty-first31st第32thirty-second第33thirty-third第34thirty-fourth第35thirty-fifth第36thirty-sixth第37thirty-seventh第38thirty-eighth第39thirty-ninth第40fortieth第41forty-first第42forty-second第43forty-third第44forty-fourth第45forty-fifth第46forty-sixth第47forty-seventh第48forty-eighth第49forty-ninth第50fiftieth口诀解说举例子基变序，有规律后面th加上去在数词后面加thfour→fourth一二三，特殊记后面字母t,d,done,two,three特殊变first，second，third八去t，九去eight去掉t，nieight→eiene去掉eghthnine→ninthf来把ve替five和twelve的ve要变成ffive→fifthtwelve→twelfth若是遇到几十几只变个位就可以两位数或两位以上数字只变个位thirty-five→thirty-fifth序数词前要加the我们一定要牢记叙述此前必须加the（上述原则中的除外）thefirstday1.one2.two3.three4.four5.five6.six7.seven8.eight9.nine10.ten11.eleven12.twelve13.thirteen14.forteen15.fifteen16.sixteen17.seventeen18.eighteen19.ninteen20.twenty21.twenty-one22.twenty-two23.twenty-three24.twenty-four25.twenty-five26.twenty-six27.twenty-seven28.twenty-eight29.twenty-nine30.thirty31.thirty-one32.thirty-two33.thirty-three34.thirty-four35.thirty-five36.thirty-six37.thirty-seven38.thirty-eight39.thirty-nine40.forty41.forty-one42.forty-two43.forty-three44.forty-four45.forty-five46.forty-six47.forty-seven48.forty-eight49.forty-nine50.fifty