word完整版)1-50序数词1—50的序数词第1 first 1st第2 second 2nd第3 third 3rd第4 fourth 4th第5 fifth 5th第6 sixth 6th第7 seventh 7th第8 eighth 8th第9 ninth 9th第10 tenth 10th第11 eleventh 11th第12 twelfth 12th第13 thirteenth 13th第14 fourteenth 14th第15 fifteenth 15th第16 sixteenth 16th第17 seventeenth 17th第18 eighteenth 18th第19 nineteenth 19th第20 twentieth 20th第21 twenty-first 21st第22 twenty-second 22nd第23 twenty-third 23rd第24 twenty-fourth 24th第25 twenty-fifth 25th第26 twenty—sixth 26th第27 twenty—seventh 27th第28 twenty-eighth 28th第29 twenty—ninth 29th第30 thirtieth 30th第31 thirty—first 31st第32 thirty—second第33 thirty—third第34 thirty-fourth第35 thirty-fifth第36 thirty-sixth第37 thirty—seventh第38 thirty—eighth第39 thirty-ninth第40 fortieth第41 forty-first第42 forty—second第43 forty-third第44 forty—fourth第45 forty—fifth第46 forty—sixth第47 forty-seventh第48 forty—eighth第49 forty—ninth第50 fiftieth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eeight去掉t，nine去掉eeight → eighth nine → ninthf来把ve替five和twelve的ve要变成f five→ fifth twelve→ 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)the first day1. one2。
two3. three4 four5. five6 six7. seven8 eight9 nine10ten11.eleven12.twelve13thirteen14forteen15fifteen16sixteen17.seventeen18eighteen19ninteen20twenty21.twenty—one22.twenty-two23twenty-three24twenty-four25.twenty-five26.twenty—six27twenty—seven28.twenty-eight29.twenty-nine30.thirty31thirty—one32.thirty-two33thirty—three34.thirty-four35.thirty-five36.thirty-six37.thirty-seven38thirty-eight39.thirty—nine40forty41forty-one42forty-two43forty—three44forty-four45.forty—five46.forty-six47.forty-seven48.forty—eight49。
forty-nine50fifty 。