在学习英语的过程中，掌握序数词是非常基础且重要的内容。序数词用于表示顺序或排名，如“第一”、“第二”等。对于初学者来说，了解和记忆这些词不仅有助于日常交流，还能提升写作和表达的准确性。

英语中的序数词大多由基数词加上特定的后缀构成，但也有许多不规则的变化，需要特别注意。以下是从1到100的英语序数词列表，帮助大家系统地掌握这一知识点。

一、基本规则

大多数序数词的构成方式是将基数词的末尾字母“-th”替换为“-th”，例如：

- one → first

- two → second

- three → third

- four → fourth

- five → fifth

- six → sixth

- seven → seventh

- eight → eighth

- nine → ninth

- ten → tenth

从11开始，部分数字的序数词会有所不同，比如：

- eleven → eleventh

- twelve → twelfth

- thirteen → thirteenth

- fourteen → fourteenth

- fifteen → fifteenth

- sixteen → sixteenth

- seventeen → seventeenth

- eighteen → eighteenth

- nineteen → nineteenth

二、特殊变化

一些序数词的拼写与基数词不同，常见的有：

- one → first

- two → second

- three → third

- five → fifth

- eight → eighth

- nine → ninth

- twelve → twelfth

此外，像“twenty”、“thirty”等以“y”结尾的数字，其序数词通常是将“y”改为“i”再加“eth”：

- twenty → twentieth

- thirty → thirtieth

- forty → fortieth

- fifty → fiftieth

- sixty → sixtieth

- seventy → seventieth

- eighty → eightieth

- ninety → ninetieth

三、完整列表（1至100）

以下是完整的1至100的英语序数词，方便查阅和记忆：

1. first

2. second

3. third

4. fourth

5. fifth

6. sixth

7. seventh

8. eighth

9. ninth

10. tenth

11. eleventh

12. twelfth

13. thirteenth

14. fourteenth

15. fifteenth

16. sixteenth

17. seventeenth

18. eighteenth

19. nineteenth

20. twentieth

21. twenty-first

22. twenty-second

23. twenty-third

24. twenty-fourth

25. twenty-fifth

26. twenty-sixth

27. twenty-seventh

28. twenty-eighth

29. twenty-ninth

30. thirtieth

31. thirty-first

32. thirty-second

33. thirty-third

34. thirty-fourth

35. thirty-fifth

36. thirty-sixth

37. thirty-seventh

38. thirty-eighth

39. thirty-ninth

40. fortieth

41. forty-first

42. forty-second

43. forty-third

44. forty-fourth

45. forty-fifth

46. forty-sixth

47. forty-seventh

48. forty-eighth

49. forty-ninth

50. fiftieth

51. fifty-first

52. fifty-second

53. fifty-third

54. fifty-fourth

55. fifty-fifth

56. fifty-sixth

57. fifty-seventh

58. fifty-eighth

59. fifty-ninth

60. sixtieth

61. sixty-first

62. sixty-second

63. sixty-third

64. sixty-fourth

65. sixty-fifth

66. sixty-sixth

67. sixty-seventh

68. sixty-eighth

69. sixty-ninth

70. seventieth

71. seventy-first

72. seventy-second

73. seventy-third

74. seventy-fourth

75. seventy-fifth

76. seventy-sixth

77. seventy-seventh

78. seventy-eighth

79. seventy-ninth

80. eightieth

81. eighty-first

82. eighty-second

83. eighty-third

84. eighty-fourth

85. eighty-fifth

86. eighty-sixth

87. eighty-seventh

88. eighty-eighth

89. eighty-ninth

90. ninetieth

91. ninety-first

92. ninety-second

93. ninety-third

94. ninety-fourth

95. ninety-fifth

96. ninety-sixth

97. ninety-seventh

98. ninety-eighth

99. ninety-ninth

100. one hundredth

四、小贴士

- 序数词在句子中通常用于表示日期、排名、位置等。

- 在书写时，序数词一般使用阿拉伯数字加“st”、“nd”、“rd”、“th”来表示，如：1st, 2nd, 3rd, 4th 等。

- 有些情况下，序数词可以作为形容词使用，如：“the first day”。

通过不断练习和应用，掌握这些序数词将变得轻松自然。无论是考试、写作还是日常对话，熟练运用英语序数词都能让表达更加准确和地道。希望这篇整理对你的英语学习有所帮助！