【序数词和基数词1到100】在英语学习中，掌握数字的表达方式是非常基础且重要的内容。其中，基数词（cardinal numbers）用于表示数量，如“one”、“two”等；而序数词（ordinal numbers）则用于表示顺序或位置，如“first”、“second”等。本文将总结1到100之间的基数词与序数词，并以表格形式清晰展示。
一、基数词与序数词的基本规则
1. 基数词：从1到20为独立单词，21到99由十位和个位组成，如“twenty-one”。
2. 序数词：通常在基数词后加“-th”，但有例外，如“first”、“second”、“third”等。对于以“y”结尾的基数词，需将“y”改为“i”再加“-eth”，如“twenty”→“twentieth”。
二、1到100的基数词与序数词对照表
| 基数词 | 序数词 | 基数词 | 序数词 | 基数词 | 序数词 |
| 1 | first | 31 | thirty-first | 61 | sixty-first |
| 2 | second | 32 | thirty-second | 62 | sixty-second |
| 3 | third | 33 | thirty-third | 63 | sixty-third |
| 4 | fourth | 34 | thirty-fourth | 64 | sixty-fourth |
| 5 | fifth | 35 | thirty-fifth | 65 | sixty-fifth |
| 6 | sixth | 36 | thirty-sixth | 66 | sixty-sixth |
| 7 | seventh | 37 | thirty-seventh | 67 | sixty-seventh |
| 8 | eighth | 38 | thirty-eighth | 68 | sixty-eighth |
| 9 | ninth | 39 | thirty-ninth | 69 | sixty-ninth |
| 10 | tenth | 40 | fortieth | 70 | seventieth |
| 11 | eleventh | 41 | forty-first | 71 | seventy-first |
| 12 | twelfth | 42 | forty-second | 72 | seventy-second |
| 13 | thirteenth | 43 | forty-third | 73 | seventy-third |
| 14 | fourteenth | 44 | forty-fourth | 74 | seventy-fourth |
| 15 | fifteenth | 45 | forty-fifth | 75 | seventy-fifth |
| 16 | sixteenth | 46 | forty-sixth | 76 | seventy-sixth |
| 17 | seventeenth | 47 | forty-seventh | 77 | seventy-seventh |
| 18 | eighteenth | 48 | forty-eighth | 78 | seventy-eighth |
| 19 | nineteenth | 49 | forty-ninth | 79 | seventy-ninth |
| 20 | twentieth | 50 | fiftieth | 80 | eightieth |
| 21 | twenty-first | 51 | fifty-first | 81 | eighty-first |
| 22 | twenty-second | 52 | fifty-second | 82 | eighty-second |
| 23 | twenty-third | 53 | fifty-third | 83 | eighty-third |
| 24 | twenty-fourth | 54 | fifty-fourth | 84 | eighty-fourth |
| 25 | twenty-fifth | 55 | fifty-fifth | 85 | eighty-fifth |
| 26 | twenty-sixth | 56 | fifty-sixth | 86 | eighty-sixth |
| 27 | twenty-seventh | 57 | fifty-seventh | 87 | eighty-seventh |
| 28 | twenty-eighth | 58 | fifty-eighth | 88 | eighty-eighth |
| 29 | twenty-ninth | 59 | fifty-ninth | 89 | eighty-ninth |
| 30 | thirtieth | 60 | sixtieth | 90 | ninetieth |
三、常见错误与注意事项
1. 序数词拼写容易出错：例如，“fourteen”是“fourteenth”，而不是“fourteent”。
2. 特殊变化：像“one”变为“first”，“two”变为“second”，“three”变为“third”这些需要特别记忆。
3. 避免混淆：注意“fifty”和“fiftieth”的区别，前者是基数词，后者是序数词。
4. 使用场合：序数词常用于日期、排名、比赛名次等场景，如“the 1st of July”或“he came in 3rd place”。
通过以上总结与表格，可以更系统地掌握1到100的基数词与序数词，帮助提高英语表达的准确性与自然性。
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