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,12thtwelfth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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