這篇要介紹英文數字的基數與序數
基數:1、2、3、4、5
序數:第1、第2、第3、第4、第5
用英文來看的話,就是以下這樣:
基數:one、two、three、four、five
序數:first、second、third、forth、fifth
序數縮寫:1st、2nd、3rd、4th、5th
序數規則
序數1~10我們務必先記下來
1st:first 2nd:second 3rd:third
4th:fourth 5th:fifth 6th:sixth
7th:seventh 8th:eighth 9th:ninth 10th:tenth
規則:
1、2、3這三者的序數跟基數完全不同,需先記下來
4~10,基本上是基數+th,但是有些會有些微改變
基數直接+th的:fourth(4)、sixth(6)、seventh(7)、eighth(8)、tenth(10)
與基數有些不同的:fifth(5)、ninth(9)
11~19的序數規則
基本上也是基數+th,但也是會有一些變化
11th eleventh
12th twelfth
13th thirteenth
14th fourteenth
15th fifteenth
16th sixteenth
17th seventeenth
18th eighteenth
19th nineteenth
注意,12th :twelfth最常被學生忘記!
20之後的序數規則
序數20以後就不用記了!
十位數用基數;個位數用序數
舉例來說:
23=20+3=twenty-third
45=40+5=forty-fifth
64=60+4= sixty-fourth
10的倍數規則
10是tenth,就是ten+th。沒什麼問題
至於20、30、40、50、60、70、80、90,由於字尾是y,因此會有規則變化。(英文單字只要字尾是y,大部分需要考慮規則變化的問題)
10的倍數規則(不含10):去y,加ieth
例如:
20:twenty → twentieth
30:thirty → thirtieth
50:fifty → fiftieth
以此類推
序數使用時機
雖然說序數的中文意思可以理解為"第xxx",但實際上就算知道這個,用英文的有時候還是會忘記用序數,所以要記得幾個常見的序數使用時機。
1)一般情況,當作"第xxx"的時候。(此時序數前要加the或所有格)
例句:
I am always the first person to arrive at the classeoom. 我總是第一個到達教室的人。
This is my second friend,Louis. 這是我第二個朋友,Louis。
2)名次/第幾名
例句:
I got first prize in the contest. 我在這個競賽當中得到第一名。
3)日期
日期很容易忘記,但又非常常用的序數使用時機。
例句:
I was born on April 20th. 我出生在4月20號。
4)幾分之幾(分數)
幾分之幾的分數:分子用基數,分母用序數表示!
另外,若分子大於1,分母序數字尾要加 s
舉例來說:
三分之一(1/3):One-third
三分之二(2/3):Two- thirds
5)樓層
樓層用序數很好理解,因為我們中文也常常講"第x樓"
例句:
I am on the 3rd floor now. 我現在在三樓。
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序數列表1~100
提供給大家忘記的時候可以複習
1st first
2nd second
3rd third
4th fourth
5th fifth
6th sixth
7th seventh
8th eighth
9th ninth
10th tenth
11th eleventh
12th twelfth
13th thirteenth
14th fourteenth
15th fifteenth
16th sixteenth
17th seventeenth
18th eighteenth
19th nineteenth
20th twentieth
21st twenty-first
22nd twenty-second
23rd twenty-third
24th twenty-forth
25th twenty-fifth
26th twenty-sixth
27th twenty-seventh
28th twenty-eighth
29th twenty-ninth
30th thirtieth
31st thirty-first
32nd thirty-second
33rd thirty-third
34th thirty-fourth
35th thirty-fifth
36th thirty-sixth
37th thirty-seventh
38th thirty-eighth
39th thirty-ninth
40th fortieth
41st forty-first
42nd forty-second
43rd forty-third
44th forty-fourth
45th forty-fifth
46th forty-sixth
47th forty-seventh
48th forty-eighth
49th forty-ninth
50th fiftieth
51st fifty-first
52nd fifty-second
53rd fifty-third
54th fifty-fourth
55th fifty-fifth
56th fifty-sixth
57th fifty-seventh
58th fifty-eighth
59th fifty-ninth
60th sixtieth
61st sixty-first
62nd sixty-second
63rd sixty-third
64th sixty-fourth
65th sixty-fifth
66th sixty-sixth
67th sixty-seventh
68th sixty-eighth
69th sixty-ninth
70th seventieth
71st seventy-first
72nd seventy-second
73rd seventy-third
74th seventy-fourth
75th seventy-fifth
76th seventy-sixth
77th seventy-seventh
78th seventy-eighth
79th seventy-ninth
80th eightieth
81st eighty-first
82nd eighty-second
83rd eighty-third
84th eighty-fourth
85th eighty-fifth
86th eighty-sixth
87th eighty-seventh
88th eighty-eighth
89th eighty-ninth
90th ninetieth
91st ninety-first
92nd ninety-second
93rd ninety-third
94th ninety-fourth
95th ninety-fifth
96th ninety-sixth
97th ninety-seventh
98th ninety-eighth
99th ninety-ninth
100th hundredth
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