【序数词1到99缩写】在英语中，序数词用于表示顺序或排名，如“first”（第一）、“second”（第二）等。在日常书写或正式文档中，为了简洁和规范，常常使用序数词的缩写形式。以下是对1到99的序数词及其常见缩写的总结。
一、序数词缩写规则
1. 基本规则：
- 多数序数词的缩写是将单词末尾的“th”保留，例如“1st”、“2nd”、“3rd”。
- 但“1st”、“2nd”、“3rd”这三个序数词的缩写是特殊的，其余的通常用“th”结尾。
2. 特殊处理：
- “1st” → “1st”（不加“e”）
- “2nd” → “2nd”
- “3rd” → “3rd”
- “4th” 及以上 → “4th”、“5th”……一直到“99th”
二、1到99序数词及缩写对照表
| 序号 | 序数词 | 缩写 |
| 1 | first | 1st |
| 2 | second | 2nd |
| 3 | third | 3rd |
| 4 | fourth | 4th |
| 5 | fifth | 5th |
| 6 | sixth | 6th |
| 7 | seventh | 7th |
| 8 | eighth | 8th |
| 9 | ninth | 9th |
| 10 | tenth | 10th |
| 11 | eleventh | 11th |
| 12 | twelfth | 12th |
| 13 | thirteenth | 13th |
| 14 | fourteenth | 14th |
| 15 | fifteenth | 15th |
| 16 | sixteenth | 16th |
| 17 | seventeenth | 17th |
| 18 | eighteenth | 18th |
| 19 | nineteenth | 19th |
| 20 | twentieth | 20th |
| 21 | twenty-first | 21st |
| 22 | twenty-second | 22nd |
| 23 | twenty-third | 23rd |
| 24 | twenty-fourth | 24th |
| 25 | twenty-fifth | 25th |
| 26 | twenty-sixth | 26th |
| 27 | twenty-seventh | 27th |
| 28 | twenty-eighth | 28th |
| 29 | twenty-ninth | 29th |
| 30 | thirtieth | 30th |
| 31 | thirty-first | 31st |
| 32 | thirty-second | 32nd |
| 33 | thirty-third | 33rd |
| 34 | thirty-fourth | 34th |
| 35 | thirty-fifth | 35th |
| 36 | thirty-sixth | 36th |
| 37 | thirty-seventh | 37th |
| 38 | thirty-eighth | 38th |
| 39 | thirty-ninth | 39th |
| 40 | fortieth | 40th |
| 41 | forty-first | 41st |
| 42 | forty-second | 42nd |
| 43 | forty-third | 43rd |
| 44 | forty-fourth | 44th |
| 45 | forty-fifth | 45th |
| 46 | forty-sixth | 46th |
| 47 | forty-seventh | 47th |
| 48 | forty-eighth | 48th |
| 49 | forty-ninth | 49th |
| 50 | fiftieth | 50th |
| 51 | fifty-first | 51st |
| 52 | fifty-second | 52nd |
| 53 | fifty-third | 53rd |
| 54 | fifty-fourth | 54th |
| 55 | fifty-fifth | 55th |
| 56 | fifty-sixth | 56th |
| 57 | fifty-seventh | 57th |
| 58 | fifty-eighth | 58th |
| 59 | fifty-ninth | 59th |
| 60 | sixtieth | 60th |
| 61 | sixty-first | 61st |
| 62 | sixty-second | 62nd |
| 63 | sixty-third | 63rd |
| 64 | sixty-fourth | 64th |
| 65 | sixty-fifth | 65th |
| 66 | sixty-sixth | 66th |
| 67 | sixty-seventh | 67th |
| 68 | sixty-eighth | 68th |
| 69 | sixty-ninth | 69th |
| 70 | seventieth | 70th |
| 71 | seventy-first | 71st |
| 72 | seventy-second | 72nd |
| 73 | seventy-third | 73rd |
| 74 | seventy-fourth | 74th |
| 75 | seventy-fifth | 75th |
| 76 | seventy-sixth | 76th |
| 77 | seventy-seventh | 77th |
| 78 | seventy-eighth | 78th |
| 79 | seventy-ninth | 79th |
| 80 | eightieth | 80th |
| 81 | eighty-first | 81st |
| 82 | eighty-second | 82nd |
| 83 | eighty-third | 83rd |
| 84 | eighty-fourth | 84th |
| 85 | eighty-fifth | 85th |
| 86 | eighty-sixth | 86th |
| 87 | eighty-seventh | 87th |
| 88 | eighty-eighth | 88th |
| 89 | eighty-ninth | 89th |
| 90 | ninetieth | 90th |
| 91 | ninety-first | 91st |
| 92 | ninety-second | 92nd |
| 93 | ninety-third | 93rd |
| 94 | ninety-fourth | 94th |
| 95 | ninety-fifth | 95th |
| 96 | ninety-sixth | 96th |
| 97 | ninety-seventh | 97th |
| 98 | ninety-eighth | 98th |
| 99 | ninety-ninth | 99th |
三、注意事项
- 在正式写作中，应根据上下文判断是否使用缩写。例如，在表格、列表或时间表达中常用缩写，而在文章中则可能需要完整拼写。
- 注意区分“1st”与“1st”的正确写法，避免拼写错误。
- 对于大于100的序数词，一般也采用“th”结尾，如“100th”、“101st”等。
通过掌握这些序数词的缩写方式，可以更高效地进行书面表达，提升专业性和准确性。
