下载文档原格式
基数词序数词基数词（0-100）1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten11 eleven12 twelve13 thirteen14 fourteen15 fifteen16 sixteen17 seventeen18 eighteen19 nineteen20 twenty 21 twenty-one22 twenty-two23 twenty-three24 twenty-four25 twenty-five26 twenty-six27 twenty-seven28 twenty-eight29 twenty-nine30 thirty31 thirty-one32 thirty-two33 thirty-three34 thirty-four35 thirty-five36 thirty-six37 thirty-seven38 thirty-eight39 thirty-nine40 forty41 forty-one42 forty-two43 forty-three44 forty-four45 forty-five46 forty-six47 forty-seven48 forty-eight49 forty-nine50 fifty51 fifty-one52 fifty-two53 fifty-three54 fifty-four55 fifty-five56 fifty-six57 fifty-seven58 fifty-eight59 fifty-nine60 sixty61 sixty-one62 sixty-two63 sixty-three64 sixty-four65 sixty-five66 sixty-six67 sixty-seven68 sixty-eight69 sixty-nine70 seventy71 seventy-one72 seventy-two73 seventy-three74 seventy-four75 seventy-five76 seventy-six77 seventy-seven78 seventy-eight79 seventy-nine80 eighty81 eighty-one82 eighty-two83 eighty-three84 eighty-four85 eighty-five86 eighty-six87 eighty-seven88 eighty-eight89 eighty-nine90 ninety91 ninety-one92 ninety-two93 ninety-three94 ninety-four95 ninety-five96 ninety-six97 ninety-seven98 ninety-eight99 ninety-nine100 one hundred序数词：第1 first第2 second第3 third第4 fourth第5 fifth第6 sixth第7 seventh第8 eighth第9 ninth第10 tenth第11 eleventh第12 twelfth第13 thirteenth第14 fourteenth第15 fifteenth第16 sixteenth第17 seventeenth 第18 eighteenth第19 nineteenth第20 twentieth第21 twenty-first第22 twenty-second 第23 twenty-third第24 twenty-fourth第25 twenty-fifth第26 twenty-sixth第27 twenty-seventh第28 twenty-eighth第29 twenty-ninth第30 thirtieth第31 thirty-first第32 thirty-second第33 thirty-third第34 thirty-fourth第35 thirty-fifth第36 thirty-sixth第37 thirty-seventh第38 thirty-eighth第39 thirty-ninth第40 fortieth第41 forty-first第42 forty-second第43 forty-third第44 forty-fourth第45 forty-fifth第46 forty-sixth第47 forty-seventh第48 forty-eighth第49 forty-ninth第50 fiftieth第51 fifty-first第52 fifty-second第53 fifty-third第54 fifty-fourth第55 fifty-fifth第56 fifty-sixth第57 fifty-seventh第58 fifty-eighth第59 fifty-ninth第60 sixtieth第61 sixty-first第62 sixty-second第63 sixty-third第54 sixty-fourth第65 sixty-fifth第66 sixty-sixth第67 sixty-seventh第68 sixty-eighth第69 sixty-ninth第70 seventieth第71 seventy-first第72 seventy-second第73 seventy-third第74 seventy-fourth第75 seventy-fifth第76 seventy-sixth第77seventy-seventh第78 seventy-eighth第79 seventy-ninth第80 eightieth第81 eighty-first第82 eighty-second第83 eighty-third第84 eighty-fourth第85 eighty-fifth第86 eighty-sixth第87 eighty-seventh第88 eighty-eighth第89 eighty-ninth第90 ninetieth第91 ninety-first第92 ninety-second第93 ninety-third第94 ninety-fourth第95 ninety-fifth第96 ninety-sixth第97 ninety-seventh第98 ninety-eighth第99 ninety-ninth第100 onehundredth序数词下面把1－99的序数词分为四类:1、第一类first (1st) 第一second (2nd) 第二third (3rd) 第三（在括号里的是缩写形式，均在阿拉伯数字后面加上相应序数词的最后两个字母构成，以下各类与此相同。
1到30基数词序数词表1到30基数词序数词表本文将提供1到30的基数词和序数词表，让读者更好地了解这些数字的含义和用法。
基数词• 1 - one• 2 - two• 3 - three• 4 - four• 5 - five• 6 - six•7 - seven•8 - eight•9 - nine•10 - ten•11 - eleven•12 - twelve•13 - thirteen •14 - fourteen •15 - fifteen•16 - sixteen•17 - seventeen •18 - eighteen •19 - nineteen •20 - twenty•21 - twenty-one •22 - twenty-two •23 - twenty-three •24 - twenty-four •25 - twenty-five •26 - twenty-six •27 - twenty-seven •28 - twenty-eight•30 - thirty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•16th - sixteenth•17th - seventeenth •18th - eighteenth •19th - nineteenth •20th - twentieth•21st - twenty-first •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以上是1到30的基数词和序数词表，希望对读者有所帮助。
1-100英语基数词和序数词1-100英语基数词和序数词如下所示：1.One, First2.Two, Second3.Three, Third4.Four, Fourth5.Five, Fifth6.Six, Sixth7.Seven , Seventh8.Eight, Eighth9.Nine, Ninth10.Ten, Tenth11.Eleven, Eleventh12.Twelve, Twelfth13.Thirteen, Thirteenth14.Fourteen, Fourteenth15.Fifteen, Fifteenth16.Sixteen, Sixteenth17.Seventeen, Seventeenth18.Eighteen, Eighteenth19.Nineteen, Nineteenth20.Twenty, Twentieth21.Twenty-one, Twenty-first22.Twenty-two, Twenty-second23.Twenty-three, Twenty-third24.Twenty-four, Twenty-fourth25.Twenty-five, Twenty-fifth26.Twenty-six, Twenty-sixth27.Twenty-seven, Twenty-seventh28.Twenty-eight, Twenty-eighth29.Twenty-nine, Twenty-ninth30.Thirty, Thirtieth31.Thirty-one, Thirty-first32.Thirty-two, Thirty-second33.Thirty-three, Thirty-third34.Thirty-four, Thirty-fourth35.Thirty-five, Thirty-fifth36.Thirty-six, Thirty-sixth37.Thirty-seven, Thirty-seventh38.Thirty-eight, Thirty-eighth39.Thirty-nine, Thirty-ninth40.Forty, Fortieth41.Forty-one, Forty-first42.Forty-two, Forty-second43.Forty-three, Forty-third44.Forty-four, Forty-fourth45.Forty-five, Forty-fifth46.Forty-six, Forty-sixth47.Forty-seven, Forty-seventh48.Forty-eight, Forty-eighth49.Forty-nine, Forty-ninth50.Fifty, Fiftieth51.Fifty-one, Fifty-first52.Fifty-two, Fifty-second53.Fifty-three, Fifty-third54.Fifty-four, Fifty-fourth55.Fifty-five, Fifty-fifth56.Fifty-six, Fifty-sixth57.Fifty-seven, Fifty-seventh58.Fifty-eight, Fifty-eighth59.Fifty-nine, Fifty-ninth60.Sixty, Sixtieth61.Sixty-one, Sixty-first62.Sixty-two, Sixty-second63.Sixty-three, Sixty-third64.Sixty-four, Sixty-fourth65.Sixty-five, Sixty-fifth66.Sixty-six, Sixty-sixth67.Sixty-seven, Sixty-seventh68.Sixty-eight, Sixty-eighth69.Sixty-nine, Sixty-ninth70.Seventy, Seventieth71.Seventy-one, Seventy-first72.Seventy-two, Seventy-second73.Seventy-three, Seventy-third74.Seventy-four, Seventy-fourth75.Seventy-five, Seventy-fifth76.Seventy-six, Seventy-sixth77.Seventy-seven, Seventy-seventh78.Seventy-eight, Seventy-eighth79.Seventy-nine, Seventy-ninth80.Eighty, Eightieth81.Eighty-one, Eighty-first82.Eighty-two, Eighty-second83.Eighty-three, Eighty-third84.Eighty-four, Eighty-fourth85.Eighty-five, Eighty-fifth86.Eighty-six, Eighty-sixth87.Eighty-seven, Eighty-seventh88.Eighty-eight, Eighty-eighth89.Eighty-nine, Eighty-ninth90.Ninety, Ninetieth91.Ninety-one, Ninety-first92.Ninety-two, Ninety-second93.Ninety-three, Ninety-third94.Ninety-four, Ninety-fourth95.Ninety-five, Ninety-fifth96.Ninety-six, Ninety-sixth97.Ninety-seven, Ninety-seventh98.Ninety-eight, Ninety-eighth99.Ninety-nine, Ninety-ninth 100.One hundred, Hundredth。
基数词序数词基数词（0-100）1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten11eleven12twelve13 thirteen14 fourteen15fifteen16sixteen17 seventee n18 eighteen19 nineteen20twenty21twenty-o ne22twenty-two23twenty-three24twenty-four25twenty-five26twenty-six27twenty-seven28twenty-eight29twenty-nine30thirty31thirty-one32thirty-two33thirty-three34thirty-four35thirty-five36thirty-six37thirty-seven38thirty-eight39thirty-nine40forty41forty-one42forty-two43forty-three44forty-four45forty-five46forty-six47forty-seven48forty-eight49forty-nine50fifty51fifty-one52fifty-two53fifty-three54fifty-four55fifty-five56fifty-six57fifty-seven58fifty-eight59fifty-nine60sixty61sixty-one62sixty-two63sixty-three64sixty-four65sixty-five66sixty-six67sixty-seven68sixty-eight69sixty-nine70seventy71seventy-one72seventy-two73seventy-three74seventy-four75seventy-five76 seventy-s ix77 seventy-s even78 seventy-e ight79 seventy-n ine80eighty81eighty-one82eighty-two83eighty-three84eighty-four85eighty-five86eighty-six87eighty-seven88eighty-eight89eighty-nine90ninety91ninety-one92ninety-two93ninety-three94ninety-four95ninety-five96ninety-six97ninety-seven98ninety-eight99ninety-nine100onehundred序数词：第1 first第2second第3third第4fourth第5 fifth第6sixth第7 seventh第8eighth第9ninth第10tenth第11 eleventh第12 twelfth第13 thirteenth第14fourteenth第15fifteenth第16sixteenth第17seventeenth第18eighteenth第19nineteenth第20twentieth第21twenty-first第22twenty-second第23twenty-third第24twenty-fourth第25twenty-fifth第26twenty-sixth第27twenty-seventh第28twenty-eighth第29twenty-ninth第30thirtieth第31thirty-first第32thirty-second第33thirty-third第34thirty-fourth第35thirty-fifth第36thirty-sixth第37thirty-seventh第38thirty-eighth第39thirty-ninth第40fortieth第41forty-first第42forty-second第43forty-third第44forty-fourth第45forty-fifth第46forty-sixth第47forty-seventh第48forty-eighth第49forty-nint h第50 fiftieth第51fifty-first 第52fifty-seco nd第53fifty-thir d第54fifty-four th第55fifty-fifth 第56fifty-sixt h第57fifty-seve nth第58fifty-eigh th第59fifty-nint h第60 sixtieth第61sixty-first第62sixty-second第63sixty-third第54sixty-fourth第65sixty-fifth第66sixty-sixth第67sixty-seventh第68sixty-eighth第69sixty-ninth第70seventieth第71seventy-first第72seventy-second第73seventy-third第74seventy-fourth第75seventy-fifth第76seventy-sixth第77seventy-seventh第78seventy-eighth第79seventy-ninth第80eightieth第81eighty-first第82eighty-second第83eighty-third第84eighty-fourth第85eighty-fifth第86eighty-sixth第87eighty-seventh第88eighty-eighth第89eighty-ninth第90ninetieth第91ninety-first第92ninety-second第93ninety-third第94ninety-fourth第95ninety-fifth第96ninety-sixth第97ninety-seventh第98ninety-eighth第99ninety-ninth第100onehundredth序数词下面把1－99的序数词分为四类:1、第一类first (1st) 第一second(2nd) 第二third(3rd) 第三（在括号里的是缩写形式，均在阿拉伯数字后面加上相应序数词的最后两个字母构成，以下各类与此相同。
基数词序数词基数词（0-100）1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten11 eleven12 twelve13 thirteen14 fourteen15 fifteen16 sixteen17 seventeen18 eighteen19 nineteen20 twenty 21 twenty-one22 twenty-two23 twenty-three24 twenty-four25 twenty-five26 twenty-six27 twenty-seven28 twenty-eight29 twenty-nine30 thirty31 thirty-one32 thirty-two33 thirty-three34 thirty-four35 thirty-five36 thirty-six37 thirty-seven38 thirty-eight39 thirty-nine40 forty41 forty-one42 forty-two43 forty-three44 forty-four45 forty-five46 forty-six47 forty-seven48 forty-eight49 forty-nine50 fifty51 fifty-one52 fifty-two53 fifty-three54 fifty-four55 fifty-five56 fifty-six57 fifty-seven58 fifty-eight59 fifty-nine60 sixty61 sixty-one62 sixty-two63 sixty-three64 sixty-four65 sixty-five66 sixty-six67 sixty-seven68 sixty-eight69 sixty-nine70 seventy71 seventy-one72 seventy-two73 seventy-three74 seventy-four75 seventy-five76 seventy-six77 seventy-seven78 seventy-eight79 seventy-nine80 eighty81 eighty-one82 eighty-two83 eighty-three84 eighty-four85 eighty-five86 eighty-six87 eighty-seven88 eighty-eight89 eighty-nine90 ninety91 ninety-one92 ninety-two93 ninety-three94 ninety-four95 ninety-five96 ninety-six97 ninety-seven98 ninety-eight99 ninety-nine100 one hundred序数词：第1 first第2 second第3 third第4 fourth第5 fifth第6 sixth第7 seventh第8 eighth第9 ninth第10 tenth第11 eleventh第12 twelfth第13 thirteenth 第14 fourteenth 第15 fifteenth 第16 sixteenth 第17 seventeenth 第18 eighteenth 第19 nineteenth 第20 twentieth 第21twenty-first第22twenty-second 第23twenty-third第24twenty-fourth第25twenty-fifth第26twenty-sixth第27twenty-seventh第28twenty-eighth第29twenty-ninth第30 thirtieth第31thirty-first第32thirty-second第33thirty-third第34thirty-fourth第35thirty-fifth第36thirty-sixth第37thirty-seventh第38thirty-eighth第39thirty-ninth第40 fortieth第41 forty-first第42forty-second第43 forty-third第44forty-fourth第45 forty-fifth第46 forty-sixth第47forty-seventh第48forty-eighth第49 forty-ninth第50 fiftieth第51 fifty-first第52fifty-second第53 fifty-third第54fifty-fourth第55 fifty-fifth第56 fifty-sixth第57fifty-seventh第58fifty-eighth第59 fifty-ninth第60 sixtieth第61 sixty-first第62sixty-second第63 sixty-third第54sixty-fourth第65 sixty-fifth第66 sixty-sixth第67sixty-seventh第68sixty-eighth第69 sixty-ninth第70 seventieth第71seventy-first第72seventy-second第73seventy-third第74seventy-fourth第75seventy-fifth第76seventy-sixth第77seventy-seventh第78seventy-eighth第79seventy-ninth 第80 eightieth 第81eighty-first第82eighty-second 第83eighty-third 第84eighty-fourth第85eighty-fifth第86eighty-sixth第87eighty-seventh第88eighty-eighth第89eighty-ninth第90 ninetieth第91ninety-first第92ninety-second第93ninety-third第94ninety-fourth第95ninety-fifth第96ninety-sixth第97ninety-seventh第98ninety-eighth第99ninety-ninth第100 onehundredth序数词下面把1－99的序数词分为四类:1、第一类first (1st) 第一second (2nd) 第二third (3rd) 第三（在括号里的是缩写形式，均在阿拉伯数字后面加上相应序数词的最后两个字母构成，以下各类与此相同。
【表】1-100序数词和基数词【完全版】【表】1-100序数词和基数词【完全版】序数词是表示顺序、次序的词，而基数词是表示数量、数目的词。
在日常生活中，我们经常用到序数词和基数词。
下面是1-100的序数词和基数词的完全版表格，希望能帮助大家更好地学习和掌握这些词语。
序数词基数词1st one2nd two3rd three4th four5th five6th six7th seven8th eight9th nine10th ten11th eleven12th twelve13th thirteen14th fourteen15th fifteen16th sixteen17th seventeen18th eighteen19th nineteen20th twenty21st twenty-one 22nd twenty-two 23rd twenty-three 24th twenty-four 25th twenty-five 26th twenty-six 27th twenty-seven 28th twenty-eight 29th twenty-nine 30th thirty31st thirty-one32nd thirty-two 33rd thirty-three 34th thirty-four 35th thirty-five 36th thirty-six37th thirty-seven 38th thirty-eight 39th thirty-nine 40th forty41st forty-one42nd forty-two 43rd forty-three 44th forty-four 45th forty-five46th forty-six47th forty-seven 48th forty-eight 49th forty-nine 50th fifty52nd fifty-two53rd fifty-three54th fifty-four55th fifty-five56th fifty-six57th fifty-seven 58th fifty-eight59th fifty-nine60th sixty61st sixty-one62nd sixty-two63rd sixty-three 64th sixty-four65th sixty-five66th sixty-six67th sixty-seven 68th sixty-eight 69th sixty-nine70th seventy71st seventy-one 72nd seventy-two 73rd seventy-three 74th seventy-four 75th seventy-five 76th seventy-six 77th seventy-seven 78th seventy-eight 79th seventy-nine 80th eighty82nd eighty-two83rd eighty-three84th eighty-four85th eighty-five86th eighty-six87th eighty-seven88th eighty-eight89th eighty-nine90th ninety91st ninety-one92nd ninety-two93rd ninety-three94th ninety-four95th ninety-five96th ninety-six97th ninety-seven98th ninety-eight99th ninety-nine100th one hundred通过这个完全版的1-100序数词和基数词的表格，我们可以更清楚地了解每个序数词和基数词的对应关系。
基数词序数词表格大全-标准化文件发布号：（9456-EUATWK-MWUB-WUNN-INNUL-DDQTY-KII基数词序数词基数词（0-100）1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten11 eleven12 twelve13 thirteen14 fourteen15 fifteen16 sixteen17 seventeen18 eighteen19 nineteen20 twenty 21 twenty-one22 twenty-two23 twenty-three24 twenty-four25 twenty-five26 twenty-six27 twenty-seven28 twenty-eight29 twenty-nine30 thirty31 thirty-one32 thirty-two33 thirty-three34 thirty-four35 thirty-five36 thirty-six37 thirty-seven38 thirty-eight39 thirty-nine40 forty41 forty-one42 forty-two43 forty-three44 forty-four45 forty-five46 forty-six47 forty-seven48 forty-eight49 forty-nine50 fifty51 fifty-one52 fifty-two53 fifty-three54 fifty-four55 fifty-five56 fifty-six57 fifty-seven58 fifty-eight59 fifty-nine60 sixty61 sixty-one62 sixty-two63 sixty-three64 sixty-four65 sixty-five66 sixty-six67 sixty-seven68 sixty-eight69 sixty-nine70 seventy71 seventy-one72 seventy-two73 seventy-three74 seventy-four75 seventy-five76 seventy-six77 seventy-seven78 seventy-eight79 seventy-nine80 eighty81 eighty-one82 eighty-two83 eighty-three84 eighty-four85 eighty-five86 eighty-six87 eighty-seven88 eighty-eight89 eighty-nine90 ninety91 ninety-one92 ninety-two93 ninety-three94 ninety-four95 ninety-five96 ninety-six97 ninety-seven98 ninety-eight99 ninety-nine100 one hundred序数词：第1 first第2 second第3 third第4 fourth第5 fifth第6 sixth第7 seventh第8 eighth第9 ninth第10 tenth第11 eleventh第12 twelfth第13 thirteenth 第14 fourteenth 第15 fifteenth第16 sixteenth 第17 seventeenth第18 eighteenth 第19 nineteenth 第20 twentieth 第21 twenty-first 第22 twenty-second 第23 twenty-third第24 twenty-fourth第25 twenty-fifth第26 twenty-sixth第27 twenty-seventh第28 twenty-eighth第29 twenty-ninth第30 thirtieth第31 thirty-first第32 thirty-second第33 thirty-third第34 thirty-fourth第35 thirty-fifth第36 thirty-sixth第37 thirty-seventh第38 thirty-eighth第39 thirty-ninth第40 fortieth第41 forty-first第42 forty-second第43 forty-third第44 forty-fourth第45 forty-fifth第46 forty-sixth第47 forty-seventh第48 forty-eighth第49 forty-ninth第50 fiftieth第51 fifty-first第52 fifty-second第53 fifty-third第54 fifty-fourth第55 fifty-fifth第56 fifty-sixth第57 fifty-seventh第58 fifty-eighth第59 fifty-ninth第60 sixtieth第61 sixty-first第62 sixty-second第63 sixty-third第54 sixty-fourth第65 sixty-fifth第66 sixty-sixth第67 sixty-seventh第68 sixty-eighth第69 sixty-ninth第70 seventieth第71 seventy-first第72 seventy-second第73 seventy-third第74 seventy-fourth第75 seventy-fifth第76 seventy-sixth第77seventy-seventh第78 seventy-eighth第79 seventy-ninth第80 eightieth第81 eighty-first第82 eighty-second第83 eighty-third第84 eighty-fourth第85 eighty-fifth第86 eighty-sixth第87 eighty-seventh第88 eighty-eighth第89 eighty-ninth第90 ninetieth 第91 ninety-first 第92 ninety-second 第93 ninety-third第94 ninety-fourth第95 ninety-fifth第96 ninety-sixth第97 ninety-seventh第98 ninety-eighth第99 ninety-ninth第100 onehundredth序数词下面把1－99的序数词分为四类:1、第一类first (1st) 第一second (2nd) 第二third (3rd) 第三（在括号里的是缩写形式，均在阿拉伯数字后面加上相应序数词的最后两个字母构成，以下各类与此相同。
）这类序数词只有三个，在整个序数词里面是特殊的，就和第一类基数词一样，需要逐个地硬记下来2、第二类：fourth (4th) 第四fifth (5th) 第五sixth (6th) 第六seventh (7th) 第七eighth (8th) 第八ninth (9th) 第九tenth (10th) 第十eleventh (11th) 第十一twelfth (12th) 第十二thirteenth (13th) 第十三fourteenth (14th) 第十四fifteenth (15th) 第十五sixteenth (16th) 第十六seventeenth (17th) 第十七eighteenth (18th) 第十八nineteenth (19th) 第十九hundredth（100th）第一百这一类序数词共有十七个。
均在相应的基数词后面加上后缀－th构成。
要注意其中fifth、eighth、ninth、twelfth四个词的拼法3、第三类：twentieth (20th) 第二十thirtieth (30th) 第三十fortieth (40th) 第四十fiftieth (50th) 第五十sixtieth (60th) 第六十seventieth (70th) 第七十eightieth (80th) 第八十ninetieth (90th) 第九十这一类全是十位整数的序数词，共八个。
它们的构成方法是：先将相应的十位整数的基数词词尾－ty中的y改成i，然后在加上后缀－eth4、第四类：thirty-first (31st) 第三十一sixty-second (62nd) 第六十二eighty-seventh (87th) 第八十七ninety-eighth (98th) 第九十八这类表示“第几十几”的序数词，跟表示“几十几”的基数词一样简单。
在构成方法上均由基数词“几十几”变化而来，十位数不变，仅把个位上的基数词变成序数词就行了基数词变序数词口诀英语中基数词变为序数词时，一般在基数词后加词尾-th，但有几个词变化特殊，只要记住下面这个口诀，这些问题即可迎刃而解。
一、二、三，单独记；八去t，九除e， ve要用f替，整十基数变序数，先把ty变成tie；要是遇到两位数，十位基数个位序，th最后加上去解析口诀：one→first， two→second， three→third这三个词变化特殊，要单独记；eight→eighth，nine→ninth，八去t，九去e后再加-th； five→fifth， twelve→twelfth，五、十二把ve换成f再加-th；twenty→twentieth， thirty→thirtieth... 整十先把词尾y改为ie再加-th。
两位数时则十位数用基数词，个位数用序数词，如：twenty-first。
基数词和序数词一．表示数目多少的词叫基数词：100 one hundred1000 one thousand 1000000 one million 1000000000 one billion 1000000000000 one trilliononcetwicethree timesfour timesfortnight（两星期，14天）dozen 表示的是12score是20century 是世纪，100年decade 是10年double 是2quarter 是四分之一single 是1个，单一的基数词及序数词重要用法1. 基数词的用法基数词用于表示事物的数量，在表示基数词时，要特别注意hundred, thousand, million, billion等几个词的用法：若其前用了基数词，则不论其面是否有of，都必须用单数形式(此时若带of则通常表示特定范围中的一部分)；若泛指数百、数千、数百万等，则用 hundreds of, thousands of, millions of 等这样的结构。
