有心便是海
这个叫做英语中的序数first 第一 1st（first为全拼是规范用法， 在文章中也可以使用1st，）second 第二 2ndthird 第三 3rdfourth 第四 4thfifth 第五 5thsixth 第六 6thseventh 第七 7theighth 第八 后面简写都一样的ninth 第九tenth 第十后面扩展一下，eleventh 第十一twelfth 第十二thirteenth 第十三fourteenth 第十四fifteenth 第十五sixteenth 第十六seventeenth 第十七eighteenth 第十八nineteenth 第十九twentieth 第二十twenty-first 第二十一twenty-second 第二十二twenty-third 第二十三twenty-forthtwenty-fifthtwenty-sixthtwenty-seventhtwenty-eighthtwenty-ninththirtieth 第三十thirty-first
猪猪爱次次
1.first 1st
2.second 2ed
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 21th
22.twenty-second 22th
23.twenty-third 23th
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
这个问题只有一种答案好么 怎么说抄袭
永远的终结者
一到三十的序数词
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-firstu
22nd=twenty-second
23rd=twenty-third
24th=twenty-fourth
25th=twenty-fifth
26th=twenty-sixth
27th=twenty-seventh
28th=twenty-eighth
29th=twenty-ninth
30th=thirtieth
说明
1、许多序数词是由相应的基数词后加th构成的，如：four / fourth，six / sixth，ten / tenth，sixteen / sixteenth，但是nine变为序数词是ninth，而不是nineth。
2、twentieth, thirtieth, fortieth等表示整十的序数词，由相应的基数词将词尾y改为ie，再加th构成。
3、first, second, third通常可缩写为1st, 2nd, 3rd。凡是以th结尾的序数词可缩写为“基数词＋th”：4th, 5th, 9th, 11th, 60th, 128th等。
4、非整十的多位数，将个位数变成序数词即可：twenty-first(第21)，thirty-sixth(第36)，ninety-ninth(第99)，three hundred and sixty-fifth(第365)等。
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