英语翻译，第一是1st，第二到第二十怎么表达？有什么规律吗 flrst1st，怎么翻译？
\u7528\u82f1\u8bed\u600e\u4e48\u8bf4二 second 2nd
三 third 3rd
四 fourth 4th(四到二十都是在数字后加上th)
第二 2nd 3rd 第四到都二十都是直接加th 4th 5th 6th 7th …… 20th
1st
2nd
3rd
4th
5th
6th
7th
8th
以此类推到
20th
但之后
21st
22nd
23rd
24th
以此类推
second
third
fourth
fifth
sixth
seventh
依次类推
定义
英语上数词分两大类：基数词和序数词。
序数词是指表示顺序的数词。
记忆口诀
基变序，有规律，词尾加上-th。
一，二，三，特殊记，词尾字母t，d，d。
八去t，九除e，ve要用f替，ty将y变成i，th前面有个e。
若是碰到几十几，前用基来后用序。
整十基数变序数，先把ty变成tie，要是遇上两位数，十位基数，个位序，th最后加上去。
或者
一,二,三（first、second、third）变字体；th从4上起；8加h（eighth）,9减e（ninth）；用f代ve；ty变为tie。
1至100序数词：
第1 first 1st
第2 second 2nd
第3 third 3rd
第4 fourth 4th
第5 fifth 5th
第6 sixth 6th
第7 seventh 7th
第8 eighth 8th
第9 ninth 9th
第10 tenth 10th
第11 eleventh 11th
第12 twelfth 12th
第13 thirteenth 13th
第14 fourteenth 14th
第15 fifteenth 15th
第16 sixteenth 16th
第17 seventeenth 17th
第18 eighteenth 18th
第19 nineteenth 19th
第20 twentieth 20th
第21 twenty-first 21st
第22 twenty-second 22nd
第23 twenty-third 23rd
第24 twenty-fourth 24th
第25 twenty-fifth 25th
第26 twenty-sixth 26th
第27 twenty-seventh 27th
第28 twenty-eighth 28th
第29 twenty-ninth 29th
第30 thirtieth 30th
第31 thirty-first 31st
第32 thirty-second 32nd
第33 thirty-third 33rd
第34 thirty-fourth 34th
第35 thirty-fifth 35th
第36 thirty-sixth 36th
第37 thirty-seventh 37th
第38 thirty-eighth 38th
第39 thirty-ninth 39th
第40 fortieth 40th
第41 forty-first 41st
第42 forty-second 42nd
第43 forty-third 43rd
第44 forty-fourth 44th
第45 forty-fifth 45th
第46 forty-sixth 46th
第47 forty-seventh 47th
第48 forty-eighth 48th
第49 forty-ninth 49th
第50 fiftieth 50th
第51 fifty-first 51st
第52 fifty-second 52nd
第53 fifty-third 53rd
第54 fifty-fourth 54th
第55 fifty-fifth 55th
第56 fifty-sixth 56th
第57 fifty-seventh 57th
第58 fifty-eighth 58th
第59 fifty-ninth 59th
第60 sixtieth 60th
第61 sixty-first 61st
第62 sixty-second 62nd
第63 sixty-third 63rd
第64 sixty-fourth 64th
第65 sixty-fifth 65th
第66 sixty-sixth 66th
第67 sixty-seventh 67th
第68 sixty-eighth 68th
第69 sixty-ninth 69th
第70 seventieth 70th
第71 seventy-first 71st
第72 seventy-second 72nd
第73 seventy-third 73rd
第74 seventy-fourth 74th
第75 seventy-fifth 75th
第76 seventy-sixth 76th
第77 seventy-seventh 77th
第78 seventy-eighth 78th
第79 seventy-ninth 79th
第80 eightieth 80th
第81 eighty-first 81st
第82 eighty-second 82nd
第83 eighty-third 83rd
第84 eighty-fourth 84th
第85 eighty-fifth 85th
第86 eighty-sixth 86th
第87 eighty-seventh 87th
第88 eighty-eighth 88th
第89 eighty-ninth 89th
第90 ninetieth 90th
第91 ninety-first 91st
第92 ninety-second 92nd
第93 ninety-third 93rd
第94 ninety-fourth 94th
第95 ninety-fifth 95th
第96 ninety-sixth 96th
第97 ninety-seventh 97th
第98 ninety-eighth 98th
第99 ninety-ninth 99th
第100 one hundredth 100th
多位序词：
由基数词的形式变结尾部分为序数词形式来表示。
one hundred and twenty-first 第一百二十一
one thousand three hundred and twentieth 第一千三百二十
two hundred and fifty-second 第二百五十二
缩写
有时，序数词可以用缩写形式来表示。主要缩写形式有：
first——1st second——2nd third——3rd fourth——4th sixth——6th twentieth——20th
twenty-third——23rd 其中lst，2nd，3rd为特殊形式，其它的都是阿拉伯数字后加th。
句法功能
序数词在句中可作主语、宾语、定语和表语。
The second is what I really need． 第二个是我真正需要的。（作主语）
He chooses the second． 他挑选了第二个。（作宾语）
We are to carry out the first plan． 我们将执行第一个计划。（作定语）
She is the second in our class．在我们班她是第二名。（作表语）
注：序数词在使用时，通常前面要加定冠词the；但是如果序数词前出现不定冠词a或an时，则表示“再......”，“又......”。
We'll go over it a second time． 我们再念第二遍。
We've tried it three times．Must we try it a fourth time? 我们已经试过三遍了，还必须再试一次（第四次）吗？
方法举例
506房：Room 506;
第二中学：No.2 Middle School;
第五课：lesson 5;
第123页：Page 123;
7路公共汽车：Bus No.7
不用the的情况
在英语中，使用序数词时前面要加定冠词 the，但是，在下面的情况下则不加 the：
1．当序数词前有形容词性物主代词或名词所有格修饰时，序数词前不用 the。
Mother was my first teacher in my life.妈妈是我生命中的第一个老师。
Tom is Lily's third boyfriend. 汤姆是莉莉的第三个男朋友。
2．当表达分数时，序数词前不用 the。
One fifth of the students here are from the country. 这儿1/5的学生来自农村。
Three fourths of the students here are from the country. 这儿的3/4的学生来自农村。
3．当表达“又一，再一”时，序数词前不用 the，但可加不定冠词。
Please give me a second chance. 请再给我一次机会。
The poor woman had a third baby. 那个可怜的妇女又生了第三个宝宝。
4．当表达“年月日”时，尤其在朗读时，序数词前要加 the。但当书写时,序数词前不用the。
He was born on June 6th, 1974. 他出生在1974年6月6日。
5．当序数词在句中作状语时，序数词前不用 the。
Who got there second? 谁第二个到那儿的？
I finished the work first. 我最先完成那项工作。
6. 当表达考试（赛跑等）中获得的名次时，序数词前不用 the。
She stands first in her class. 她在班上成绩排名第一。
方法口诀
口诀
解说
举例
基变序，有规律，后面th加上去。
在数词后面加th。
four → fourth
一二三，特殊记，后面字母t,d,d。
one, two, three特殊变。
first，second，third
八去t，九去e。整数中的y要变成ie
eight去掉t，nine去掉e。twenty去掉y变成twentieth
eight → eighth nine → ninth
f 来把ve替。
five和twelve的ve要变成f 。
five→ fifth twelve→ twelfth
若是遇到几十几，只变个位就可以。
两位数或两位以上数字只变个位。
thirty-three→thirty-third
序数词前要加the 我们一定要牢记。
序数词前必须加the（上述原则中的除外）
the first day
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