【1到100的序数词是什么】在英语中，序数词用于表示顺序或排名，如“第一”、“第二”等。掌握1到100的序数词对于学习英语的人来说非常重要，尤其是在写作、阅读或日常交流中。以下是对1到100的序数词的总结，并附上表格以便查阅。
一、序数词的基本构成规则
1. 基本数字的序数词：
- 1 → first
- 2 → second
- 3 → third
- 4 → fourth
- 5 → fifth
- 6 → sixth
- 7 → seventh
- 8 → eighth
- 9 → ninth
- 10 → tenth
2. 以“-y”结尾的数字（如20, 30, 40等）：
- 20 → twentieth
- 30 → thirtieth
- 40 → fortieth
- 50 → fiftieth
- 60 → sixtieth
- 70 → seventieth
- 80 → eightieth
- 90 → ninetieth
3. 其他数字的序数词：
- 11 → eleventh
- 12 → twelfth
- 13 → thirteenth
- 14 → fourteenth
- 15 → fifteenth
- 16 → sixteenth
- 17 → seventeenth
- 18 → eighteenth
- 19 → nineteenth
- 21 → twenty-first
- 22 → twenty-second
- 23 → twenty-third
- ...以此类推。
二、1到100的序数词表
| 数字 | 序数词 | 数字 | 序数词 | 数字 | 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 |
三、注意事项
- 在书写时，序数词通常用“-th”结尾，但也有例外，如first、second、third。
- 对于大于20的数字，如果个位数不是0，通常使用连字符连接，例如twenty-first。
- 英语中没有“one hundredth”的特殊形式，直接使用“one hundredth”。
通过以上表格和说明，你可以更清晰地了解1到100的序数词，帮助你在实际应用中正确使用它们。