英語の序数一覧
日付(4月1日 = April 1st)や順位で使う序数の一覧です。🔊で発音を確認できます。
| 数字 | 省略形 | 読み方 |
|---|---|---|
| 1 | 1st | first |
| 2 | 2nd | second |
| 3 | 3rd | third |
| 4 | 4th | fourth |
| 5 | 5th | fifth |
| 6 | 6th | sixth |
| 7 | 7th | seventh |
| 8 | 8th | eighth |
| 9 | 9th | ninth |
| 10 | 10th | tenth |
| 11 | 11th | eleventh |
| 12 | 12th | twelfth |
| 13 | 13th | thirteenth |
| 14 | 14th | fourteenth |
| 15 | 15th | fifteenth |
| 16 | 16th | sixteenth |
| 17 | 17th | seventeenth |
| 18 | 18th | eighteenth |
| 19 | 19th | nineteenth |
| 20 | 20th | twentieth |
| 21 | 21st | twenty-first |
| 22 | 22nd | twenty-second |
| 23 | 23rd | twenty-third |
| 24 | 24th | twenty-fourth |
| 25 | 25th | twenty-fifth |
| 26 | 26th | twenty-sixth |
| 27 | 27th | twenty-seventh |
| 28 | 28th | twenty-eighth |
| 29 | 29th | twenty-ninth |
| 30 | 30th | thirtieth |
| 31 | 31st | thirty-first |
| 40 | 40th | fortieth |
| 50 | 50th | fiftieth |
| 100 | 100th | one hundredth |
| 1000 | 1000th | one thousandth |
使い分けのルール
- 1 → st、2 → nd、3 → rd、それ以外 → th(21st、22nd、23rd も同様)
- 例外: 11th、12th、13th は th(eleven/twelve/thirteen 由来)
- five → fifth、nine → ninth、twelve → twelfth はつづりが変化
- twenty → twentieth のように ty は tieth に変わる