【1到100的英语单词序数词怎么写】在学习英语的过程中，序数词是表达顺序、排名或位置的重要词汇。与基数词（表示数量）不同，序数词用于表示“第几”的概念。掌握1到100的英语序数词对于日常交流、写作以及考试都非常重要。
以下是对1到100英语序数词的总结，并以表格形式展示，便于查阅和记忆。
一、序数词的基本构成规则
1. 一般情况下：在基数词后加 -th。
- 例如：four → fourth, five → fifth
2. 特殊变化：
- 1 → first
- 2 → second
- 3 → third
- 5 → fifth
- 8 → eighth
- 9 → ninth
- 12 → twelfth
3. 以y结尾的基数词：将y改为i，再加-th。
- 例如：twenty → twentieth, thirty → thirtieth
4. 其他特殊情况：
- 21 → twenty-first
- 22 → twenty-second
- 23 → twenty-third
- 以此类推
二、1到100的英语序数词表
| 序号 | 英语序数词 | 序号 | 英语序数词 | 序号 | 英语序数词 |
| 1 | first | 34 | thirty-fourth | 67 | sixty-seventh |
| 2 | second | 35 | thirty-fifth | 68 | sixty-eighth |
| 3 | third | 36 | thirty-sixth | 69 | sixty-ninth |
| 4 | fourth | 37 | thirty-seventh | 70 | seventieth |
| 5 | fifth | 38 | thirty-eighth | 71 | seventy-first |
| 6 | sixth | 39 | thirty-ninth | 72 | seventy-second |
| 7 | seventh | 40 | fortieth | 73 | seventy-third |
| 8 | eighth | 41 | forty-first | 74 | seventy-fourth |
| 9 | ninth | 42 | forty-second | 75 | seventy-fifth |
| 10 | tenth | 43 | forty-third | 76 | seventy-sixth |
| 11 | eleventh | 44 | forty-fourth | 77 | seventy-seventh |
| 12 | twelfth | 45 | forty-fifth | 78 | seventy-eighth |
| 13 | thirteenth | 46 | forty-sixth | 79 | seventy-ninth |
| 14 | fourteenth | 47 | forty-seventh | 80 | eightieth |
| 15 | fifteenth | 48 | forty-eighth | 81 | eighty-first |
| 16 | sixteenth | 49 | forty-ninth | 82 | eighty-second |
| 17 | seventeenth | 50 | fiftieth | 83 | eighty-third |
| 18 | eighteenth | 51 | fifty-first | 84 | eighty-fourth |
| 19 | nineteenth | 52 | fifty-second | 85 | eighty-fifth |
| 20 | twentieth | 53 | fifty-third | 86 | eighty-sixth |
| 21 | twenty-first | 54 | fifty-fourth | 87 | eighty-seventh |
| 22 | twenty-second | 55 | fifty-fifth | 88 | eighty-eighth |
| 23 | twenty-third | 56 | fifty-sixth | 89 | eighty-ninth |
| 24 | twenty-fourth | 57 | fifty-seventh | 90 | ninetieth |
| 25 | twenty-fifth | 58 | fifty-eighth | 91 | ninety-first |
| 26 | twenty-sixth | 59 | fifty-ninth | 92 | ninety-second |
| 27 | twenty-seventh | 60 | sixtieth | 93 | ninety-third |
| 28 | twenty-eighth | 61 | sixty-first | 94 | ninety-fourth |
| 29 | twenty-ninth | 62 | sixty-second | 95 | ninety-fifth |
| 30 | thirtieth | 63 | sixty-third | 96 | ninety-sixth |
| 31 | thirty-first | 64 | sixty-fourth | 97 | ninety-seventh |
| 32 | thirty-second | 65 | sixty-fifth | 98 | ninety-eighth |
| 33 | thirty-third | 66 | sixty-sixth | 99 | ninety-ninth |
| 100 | one hundredth | 100 | one hundredth |
三、小贴士
- 注意一些常见的错误，如：fiveth 应为 fifth，eighth 不是 eightth。
- 对于较大的数字，如 100，可以用 one hundredth 表示。
- 在正式写作中，序数词通常用 阿拉伯数字 + 后缀 的方式书写，如：1st, 2nd, 3rd 等。
通过以上总结和表格，可以快速掌握1到100的英语序数词，帮助你在实际使用中更加准确地表达“第几”的概念。