2025年/08月/27日 | 魚丸
你是否曾經對基數（one, two, three）和序數（first, second, third）感到困惑？或者不確定序數 英文該怎麼寫、怎麼讀、怎麼使用才正確？寫成 “1st” 要怎麼唸？該用 “first” 還是 “the first”？別擔心！ELSA Speak 會幫助你深入了解英文序數唸法、寫法與用法，並附上完整對照表與超簡單記憶小技巧。
序數 英文 (Ordinal Numbers) 是什麼?
英文數字對照表
以下是1-100英文序數對照表，並附上英文數字縮寫：
| 序數縮寫 | 序數 | 意思 |
|---|---|---|
| 1st | first | 第一 |
| 2nd | second | 第二 |
| 3rd | third | 第三 |
| 4th | fourth | 第四 |
| 5th | fifth | 第五 |
| 6th | sixth | 第六 |
| 7th | seventh | 第七 |
| 8th | eighth | 第八 |
| 9th | ninth | 第九 |
| 10th | tenth | 第十 |
| 11th | eleventh | 第十一 |
| 12th | twelfth | 第十二 |
| 13th | thirteenth | 第十三 |
| 14th | fourteenth | 第十四 |
| 15th | fifteenth | 第十五 |
| 16th | sixteenth | 第十六 |
| 17th | seventeenth | 第十七 |
| 18th | eighteenth | 第十八 |
| 19th | nineteenth | 第十九 |
| 20th | twentieth | 第二十 |
| 21st | twenty-first | 第二十一 |
| 22nd | twenty-second | 第二十二 |
| 23rd | twenty-third | 第二十三 |
| 24th | twenty-fourth | 第二十四 |
| 25th | twenty-fifth | 第二十五 |
| 26th | twenty-sixth | 第二十六 |
| 27th | twenty-seventh | 第二十七 |
| 28th | twenty-eighth | 第二十八 |
| 29th | twenty-ninth | 第二十九 |
| 30th | thirtieth | 第三十 |
| 31st | thirty-first | 第三十一 |
| 32nd | thirty-second | 第三十二 |
| 33rd | thirty-third | 第三十三 |
| 34th | thirty-fourth | 第三十四 |
| 35th | thirty-fifth | 第三十五 |
| 36th | thirty-sixth | 第三十六 |
| 37th | thirty-seventh | 第三十七 |
| 38th | thirty-eighth | 第三十八 |
| 39th | thirty-ninth | 第三十九 |
| 40th | fortieth | 第四十 |
| 41st | forty-first | 第四十一 |
| 42nd | forty-second | 第四十二 |
| 43rd | forty-third | 第四十三 |
| 44th | forty-fourth | 第四十四 |
| 45th | forty-fifth | 第四十五 |
| 46th | forty-sixth | 第四十六 |
| 47th | forty-seventh | 第四十七 |
| 48th | forty-eighth | 第四十八 |
| 49th | forty-ninth | 第四十九 |
| 50th | fiftieth | 第五十 |
| 51st | fifty-first | 第五十一 |
| 52nd | fifty-second | 第五十二 |
| 53rd | fifty-third | 第五十三 |
| 54th | fifty-fourth | 第五十四 |
| 55th | fifty-fifth | 第五十五 |
| 56th | fifty-sixth | 第五十六 |
| 57th | fifty-seventh | 第五十七 |
| 58th | fifty-eighth | 第五十八 |
| 59th | fifty-ninth | 第五十九 |
| 60th | sixtieth | 第六十 |
| 61st | sixty-first | 第六十一 |
| 62nd | sixty-second | 第六十二 |
| 63rd | sixty-third | 第六十三 |
| 64th | sixty-fourth | 第六十四 |
| 65th | sixty-fifth | 第六十五 |
| 66th | sixty-sixth | 第六十六 |
| 67th | sixty-seventh | 第六十七 |
| 68th | sixty-eighth | 第六十八 |
| 69th | sixty-ninth | 第六十九 |
| 70th | seventieth | 第七十 |
| 71st | seventy-first | 第七十一 |
| 72nd | seventy-second | 第七十二 |
| 73rd | seventy-third | 第七十三 |
| 74th | seventy-fourth | 第七十四 |
| 75th | seventy-fifth | 第七十五 |
| 76th | seventy-sixth | 第七十六 |
| 77th | seventy-seventh | 第七十七 |
| 78th | seventy-eighth | 第七十八 |
| 79th | seventy-ninth | 第七十九 |
| 80th | eightieth | 第八十 |
| 81st | eighty-first | 第八十一 |
| 82nd | eighty-second | 第八十二 |
| 83rd | eighty-third | 第八十三 |
| 84th | eighty-fourth | 第八十四 |
| 85th | eighty-fifth | 第八十五 |
| 86th | eighty-sixth | 第八十六 |
| 87th | eighty-seventh | 第八十七 |
| 88th | eighty-eighth | 第八十八 |
| 89th | eighty-ninth | 第八十九 |
| 90th | ninetieth | 第九十 |
| 91st | ninety-first | 第九十一 |
| 92nd | ninety-second | 第九十二 |
| 93rd | ninety-third | 第九十三 |
| 94th | ninety-fourth | 第九十四 |
| 95th | ninety-fifth | 第九十五 |
| 96th | ninety-sixth | 第九十六 |
| 97th | ninety-seventh | 第九十七 |
| 98th | ninety-eighth | 第九十八 |
| 99th | ninety-ninth | 第九十九 |
| 100th | hundredth | 第一百 |
1-10英文序數
從 1 到 10 的序數詞是特殊形式，需特別記憶，因為不遵循一般規則。以下是英文序數表：
| 數字 | 縮寫法 | 讀法 |
|---|---|---|
| 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 |
11-19英文序數
11 到 19 的序數詞通常是在基數詞後加上 -th，但其中仍有一些不規則形式如：
- 11th: Eleventh
- 12th: Twelfth
- 13th: Thirteenth
| 數字 | 縮寫法 | 讀法 |
|---|---|---|
| 數字 | 寫法 | 讀法 |
| 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 |
20-99英文序數
從 20 開始的序數詞形成方式如下：
- 先讀十位數部分 (twentieth, thirtieth, etc.)
- 若有個位數 (1–9), 以連字號連接相對應的序數
公式:
| [十位數] + 連字號 (-) + [個位數序數] |
例子:
| 數字 | 十位數 | 個位數 | 序數寫法 |
|---|---|---|---|
| 25 | Twenty | Fifth | Twenty-fifth |
| 39 | Thirty | Ninth | Thirty-ninth |
| 41 | Forty | First | Forty-first |
| 68 | Sixty | Eighth | Sixty-eighth |
| 73 | Seventy | Third | Seventy-third |
| 99 | Ninety | Ninth | Ninety-ninth |
100 以上的英文序數寫法
當你已經掌握基本的英文序數寫法（從 1st 到 100th），那麼書寫大於 100 的序數也會依照與英文基數（普通數字）相同的邏輯來進行。以下是一些具體的例子幫助你理解：
- 101st = one hundred (and) first
- 311th = three hundred (and) eleventh
- 1000th = thousandth
- 5289th = five thousand, two hundred (and) eighty-ninth
英文序數的讀法與寫法，附例句
英文序數讀法與英文序數寫法有一些相同的注意事項，因此 ELSA Speak 已為你整理了一個綜合表格以供參考：
| 讀法／寫法規則 | 例子說明 |
|---|---|
| T在數字後加上 -th（一般規則） | 4th → Fourth 13th → Thirteenth |
| 數字 1 為不規則形式，使用 first | 1st → First |
| 數字 2 為不規則形式，使用 second | 2nd → Second |
| 數字 3 為不規則形式，使用 third | 3rd → Third |
| 以 1、2、3 結尾的數字（除了 11、12、13）分別使用: st, nd, rd | 21st → Twenty-first 32nd → Thirty-second 43rd → Forty-third |
| 結尾為 11、12、13 的數字仍使用 th | 11th → Eleventh 12th → Twelfth 13th → Thirteenth |
| 超過 20 的數字，僅需在最後一位數加上尾綴 | 45th → Forty-fifth 92nd → Ninety-second |
英文序數用法
| 用法 | 例子 |
|---|---|
| 日期 | July 4th (7 月 4 日) October 31st (10 月 31 日) |
| 排名、名次 | She finished in 2nd place. (她獲得第二名。) This is the 5th time I’ve visited here. (這是我第五次來這裡。) |
| 建築物的樓層 | The office is on the 3rd floor. (辦公室在三樓。) They live on the 10th floor. (他們住在十樓。) |
| 書籍／文件的章節或部分 | Chapter 1 (第一章) Section 4 (第四部分) |
| 影集、節目、書冊等的集數／季數 | The 7th season is the best. (第七季最精彩。) Episode 12 (第十二集) |
| 歷史事件或時代階段 | The 21st century (21 世紀) The 4th of July is Independence Day. (7 月 4 日是美國國慶日。) |
| 生日 | My birthday is on the 15th of March. (我生日是 3 月 15 日。) Today is his 30th birthday. (今天是他的三十歲生日。) |
| 分數 (fraction) | One-third (三分之一) Two-fifths (五分之二) Three-quarters (四分之三) Seven-eighths (八分之七) |
>>閲讀更多：英文日期寫法全面指南：星期、日期、月份、年份以及正確結構
區分英文基數詞 序數詞
基數 序數 英文的區別
| 基數 (Cardinal Numbers) | 序數 (Ordinal Numbers) | |
|---|---|---|
| 功能 | 用來表示數量或計數人／事物的數量 | 用來表示順序、位置或等級 |
| 例子 | One (1), Two (2), Three (3), Twenty (20), Fifty (50) | First (1st), Second (2nd), Third (3rd), Tenth (10th), Fiftieth (50th) |
| 用法 | – 用來回答 “How many?” (多少?) – 不表示順序或位置 | 用來回答 “Which one?” (哪一個?) 或 “In what order?” (什麼順序?) |
| 舉例說明 | I have three apples. (我有三顆蘋果。) | He finished in third place. ( 他在比賽中獲得第三名。) |
將英文基數轉換為序數的規則
| 規則類型 | 基數 (Cardinal Number) | 序數 (Ordinal Number) | 備註 |
|---|---|---|---|
| 一般規則：在基數詞後加上 “-th” | Eight | Eighth | 直接加 “-th” |
| Eleven | Eleventh | 無需改變詞根，只需加 “-th” | |
| 以 -y 結尾的數字 → 將 “y” 改為 “-ieth” | Twenty | Twentieth | “y” → “ieth” |
| Forty | Fortieth | 適用於所有以 -y 結尾的整十數字 | |
| 不規則情況（例外） | One | First | 不依照加 “-th” 的規則 |
| Two | Second | ||
| Three | Third | ||
| Four | Fourth | forth 是另一個有不同意思的單詞 | |
| Five | Fifth | 注意詞形變化 five 到 fifth | |
| Eight | Eighth | 特別保留原始 | |
| Nine | Ninth | 去掉 “e” 再加 “-th”” | |
| Eleven | Eleventh | 直接加 “-th” | |
| Twelve | Twelfth | 將 “ve” 改為 “f” 再加 “th” |
>>相關文章：數字英文：1–100 的英文數字表與轉換方式
英文序數相關的成語
| Idioms | 意思 | 例句 |
|---|---|---|
| First come, first served | 先到先得 | Tickets are on a first come, first served basis. (門票將按照到達的先後順序發放。) |
| First things first | 優先處理最重要的事 | First things first, let’s check if we have enough time. (首先，我們要看看是否有足夠的時間。) |
| First and foremost | 首先且最重要的是 | First and foremost, I want to thank everyone here. (首先，我要感謝在座的所有人。) |
| At first glance | 乍看之下 | At first glance, the book seemed interesting. (乍看之下，這本書似乎很有趣。) |
| Put first things first | 優先處理最重要的事 | Put first things first if you want to manage your time better. (如果你想更好地管理時間，就要優先處理重要的事情。) |
| Second to none | 無與倫比、最棒的 | Our team’s performance was second to none. (我們隊伍的表現是無人能及的。) |
| A second chance | 第二次機會 | Everyone deserves a second chance. (每個人都值得擁有第二次機會。) |
| Think twice | 三思而後行 | You should think twice before making a decision. (你應該在決定之前好好三思。) |
| Take a second look | 再看一遍 | You should take a second look at the document. (你應該再看一次這份資料。) |
| Third time’s the charm | 事不過三、第三次就會成功 | I failed twice, but third time’s the charm! (我已經失敗兩次了，但第三次一定會成功！) |
| Two’s company, three’s a crowd | 三人行不自在 | I don’t want to go out with them; two’s company, three’s a crowd. (我不想跟他們一起去，人多會讓人不自在。) |
| In seventh heaven | 幸福滿滿、欣喜若狂 | She was in seventh heaven when she got the job. (她在得到這份工作後高興得不得了。) |
| On cloud nine | 非常快樂、樂不可支 | He’s been on cloud nine since his promotion. (他自從升職後就一直非常開心。) |
| The nth degree | 最高程度 | He took the planning to the nth degree. (他已經把計劃做到極致了。) |
| Sixth sense | 第六感、直覺 | I have a sixth sense that something is wrong. (我有預感事情有點不對勁。) |
英文序數在日常會話中的句型範例
| 使用情境 | 例句 | 翻譯 |
|---|---|---|
| 常見的序數問句 | Which one did you choose?In what order did they finish? | 你選了哪一個?他們是依照什麼順序完成的? |
| 表達位置 | She won first place in the competition. | 她在比賽中獲得第一名。 |
| 日期 | My birthday is on the 12th of October. | 我的生日是 10 月 12 日。 |
| 約會 | Our meeting is scheduled for the 3rd of November. | 我們的會議安排在 11 月 3 日。 |
| 名單中的順序 | He is the second person on the list. | 他是名單上的第二位。 |
| 建築物中的樓層 | Her office is on the fifth floor. | 她的辦公室在五樓。 |
| 家庭中的排行 | I’m the fourth child in my family. | 我在家中排行第四。 |
| 課業名次描述 | He ranked second in his class last semester. | 他上學期在班上排名第二。 |
| 表達嘗試／努力的次數 | The third attempt was successful. | 第三次嘗試成功了。 |
| 流程或步驟中的順序 | The first step is to gather all materials. | 第一步是收集所有材料。 |
| 世代的排序 | He is a second generation immigrant. | 他是第二代移民。 |
英文序數練習題
練習題
練習 1: 選出與描述序數相符的正確答案。
- What is the ordinal number of 3?
A. Three
B. Threeth
C. Third - She finished in the ______ place.
A. first
B. one
C. firstly - This is my ______ visit to the museum.
A. ten
B. tenth
C. tenth - The library is on the ______ floor.
A. six
B. sixth
C. sixthth - March is the ______ month of the year.
A. third
B. thirteen
C. three - My birthday is on the ______ of July.
A. four
B. fourth
C. forth - He is the ______ runner to finish the race.
A. five
B. fifth
C. fiveth - What comes after first?
A. Two
B. Second
C. Twoth - She lives on the ______ floor of the apartment.
A. twenty
B. twentieth
C. twentyth - Our meeting is on the ______ of November.
A. three
B. third
C. thirteenth
練習 2: 在空格中填入正確的序數
- My team got the __________ place in the contest. (3)
- He is the __________ child in his family. (5)
- This is the __________ time I’ve visited London. (2)
- Her birthday is on the __________ of August. (7)
- December is the __________ month of the year. (12)
- The elevator only goes to the __________ floor. (9)
- He celebrated his __________ wedding anniversary. (1)
- This is the __________ question on the test. (4)
- I live on the __________ floor. (10)
- They arrived in the __________ position. (8)
答案
練習 1:
| 題號 | 1 | 2 | 3 | 4 | 5 |
| 答案 | C | A | B | B | A |
| 題號 | 6 | 7 | 8 | 9 | 10 |
| 答案 | B | B | B | B | B |
練習 2:
| 題號 | 1 | 2 | 3 | 4 | 5 |
| 答案 | third | fifth | second | seventh | twelfth |
| 題號 | 6 | 7 | 8 | 9 | 10 |
| 答案 | ninth | first | fourth | tenth | eighth |
常見問題
21st or th 哪個寫法正確 ?
→ 應該寫成 21st 喔!
第二次英文缩写是什麼?
→ The second times = the 2nd time
理解序數 英文不僅能幫助你正確書寫日期、事件順序，還能讓你的英文表達更加自然與準確。別忘了透過簡單的小練習加強記憶，也可以使用英文序數學習單來輔助每日記憶喔！歡迎造訪 ELSA Speak 官方網站，探索更多關於英語根據對象主題的精彩內容。
