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基数词（・）01001one21twenty-one41forty-one61sixty-one81eighty-one2two22twenty-two42forty-two62sixty-two82eighty-two3three23twenty-three43forty-three63sixty-three83eighty-three4four24twenty-four44forty-four64sixty-four84eighty-four5five25twenty-five45forty-five65sixty-five85eighty-five6six26twenty-six46forty-six66sixty-six86eighty-six7seven27twenty-seven47forty-seven67sixty-seven87eighty-seven8eight28twenty-eight48forty-eight68sixty-eight88eighty-eight9nine29twenty-nine49forty-nine69sixty-nine89eighty-nine10ten30thirty50fifty70seventy90ninety11eleven31thirty-one51fifty-one71seventy-one91ninety-one12twelve32thirty-two52fifty-two72seventy-two92ninety-two13thirteen33thirty-three53fifty-three73seventy-three93ninety-three14fourteen34thirty-four54fifty-four74seventy-four94ninety-four15fifteen35thirty-five55fifty-five75seventy-five95ninety-five16sixteen36thirty-six56fifty-six76seventy-six96ninety-six17seventeen37thirty-seven57fifty-seven77seventy-seven97ninety-seven18eighteen38thirty-eight58fifty-eight78seventy-eight98ninety-eight19nineteen39thirty-nine59fifty-nine79seventy-nine99ninety-nine20twenty40forty60sixty80eighty100one hundred序数词第第第第第1first23twenty-third44forty-fourth66sixty-sixth86eighty-sixth第第第第第2second24twenty-fourth45forty-fifth67sixty-seventh87eighty-seventh第第第第第3third25twenty-fifth46forty-sixth68sixty-eighth88eighty-eighth第第第第第4fourth26twenty-sixth47forty-seventh69sixty-ninth89eighty-ninth第第第第第5fifth2748forty-eighth70seventieth90ninetieth第6sixth twenty-seventh第49forty-ninth第71seventy-first第91ninety-first第第第第第7seventh28twenty-eighth50fiftieth7292ninety-second第8eighth第29twenty-ninth第51fifty-first seventy-second第93ninety-third第第第第第9ninth30thirtieth52fifty-second73seventy-third94ninety-fourth第第第第第10tenth31thirty-first53fifty-third74seventy-fourth95ninety-fifth第第第第第11eleventh32thirty-second54fifty-fourth75seventy-fifth96ninety-sixth第第第第第12twelfth33thirty-third55fifty-fifth76seventy-sixth97ninety-seventh第第第第第13thirteenth34thirty-fourth56fifty-sixth98ninety-eighth第14fourteenth第35thirty-fifth第57fifty-seventh77seventy-seventh第99ninety-ninth第第第第第15fifteenth36thirty-sixth58fifty-eighth78seventy-eighth100one第16sixteenth第37thirty-seventh第59fifty-ninth第79seventy-ninth hundredth第第第第17seventeenth38thirty-eighth60sixtieth80eightieth第第第第18eighteenth39thirty-ninth61sixty-first81eighty-first第第第第19nineteenth40fortieth62sixty-second82eighty-second第第第第20twentieth41forty-first63sixty-third83eighty-third第第第第21twenty-Erst42forty-second54sixty-fourth84eighty-fourth第第第第22twenty-second43forty-third65sixty-fifth85eighty-fifth序数词下面把的序数词分为四类:1—99第一类第一第二第三L first1st second2nd third3rd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
2.第二类ninth9th第九fifteenth15th第十五fourth4th第四tenth10th第十eleventh sixteenth16th第十六第fifth5th第五sixth11th Htwelfth12th seventeenth17th第十七第十二thirteenth13th第十八第六eighteenth18th6th seventh第十三fourteenth14th第十九第七nineteenth19th7th eighth第十四第一百第八hundredth100th8th下来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一构成要注意其中、、th fifth eighth ninth四个词的拼法twelfth.第三类第四十第七十3fortieth40th seventieth70th第二十第五十第八十twentieth20th fiftieth50th eightieth80th第三十第六十第九十thirtieth30th sixtieth60th ninetieth90th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一中ty的改成然后在加上后缀一y i,eth.第四类4第三第八十七thirty-first31st H—eighty-seventh87th第六十二第九十八sixty-second62nd ninety-eighth98th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但有几个词变化特殊，只要记住下面这个口诀，这些问题-th,即可迎刃而解
一、
二、三，单独记；八去九除要用替,t,e,ve f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,最后加上去th解析口诀:这三个词变化特殊，要单独记；oneffirst.two—second.threef thirdeight^eighth.nine^ninth.八去t,九去e后再加-twelfth,
五、十二把ve换成f再加-th；twenty^整十先把词尾改为再加两位数时则十位数用基数词，个位数用序twentieth.thirtyf thirtieth…y ie-th数词,如twenty-first1one first1th2two second2nd3three third3rd4four fourth4th5five fifth5th6six sixth6th7seven seventh7th8eight eighth8th9nine ninth9th10ten tenth10th11eleven eleventh11th12twelve twelfth12th13thirteen thirteenth13th14fourteen fourteenth14th15fifteen fifteenth15th16sixteen sixteenth16th17seventeen seventeenth17th18eighteen eighteenth18th19nineteen nineteenth19th20twenty twentieth20th21twenty-one twenty-first21st22twenty-two twenty-second22nd23twenty-three twenty-third23rd24twenty-four twenty-fourth24th25twenty-five twenty-fifth25th26twenty-six twenty-sixth26th27twenty-seven twenty-seventh27th28twenty-eight twenty-eighth28th29twenty-nine twenty-ninth29th30thirty thirtieth30th40forty fortieth40th50fifty fiftieth50th60sixty sixtieth60th70seventy seventieth70th80eighty eightieth80th90ninety ninetieth90th100one hundredone hundredth100th基数词和序数词表示数目多少的词叫基数词以下的基本基数词以上1001001001-1011-1920-90a/one hundred;10001one11eleven20twentya/one thousand;2two12twelve30thirty1,000,0003three13thirteen40fortya/one million;4four14fourteen50fifty1,000,000,0005five15fifteen60sixty6six16sixteen70seventy（美）a/one billion7seven17seventeen80eighty（英）8eight18eightteen90ninety a/one thousand million9nine19nineteen10ten表示顺序的数次叫序数词基本序数词的构成1s’first11th eleventh20th twentieth30th thirtieth2nd second12th twelfth21st twenty-first40th fortieth3rd third13th thirteenth50th fiftieth22nd twenty-second4th fourth14th fourteenth23rd twenty-third60th sixtieth5th fifth15th fifteenth70th sevenyieth24th twenty-fourth6th sixth16th sixteenth25th twenty-fifth80th eightieth7th seventh17th seventeenth26th twenty-sixth90th ninetieth8th eighth18th eighteenth100th one hundredth27thtwenty-seventh9th ninth19th nineteenth1,000th onethousangth28th twenty-eighty10th tenth29th twenty-ninth1„000,000th onemillionth100,000,000th onebillionth注意Hundred thousandmilliononcetwicethree timesfourtimes两星期，天fortnight14表示的是dozen12是score20是世纪，年century100是年decade10是double2是四分之一quarter是个,单一的single1基数词及序数词重要用法基数词的用法L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,等几个词的用法若其前用了基数词，则不论其面是否有都必million,billion须用单数形式此时若带则通常表示特定范围中的一部分；若泛指数百、数千、of数百万等，则用等这样的结构如hundreds of,thousands of,millions of今天中午需要个学生Tw.hundre.o.th.student.ar.neede.t.plan.tree.thi.morning.200去植树好几百人出席了这位Hundred.o.peopl.attende.th.famou.director,.farewel.concert.著名指挥家的告别音乐会成千上万英语单词Thousand.upo.thousand.o.Englis.word.com.fro.foreig.tongues.来自外来语.基数词的复数用法2逢整“十，，的基数词的复数形式可用于表示某人的大约年岁和世纪中的年代如.这次战争爆发于年代
90.马克思五十多岁开始学俄语Kar.Mar.bega.t.lear.th.Russia.languag.i.hi.fiftieth.序数词的用.3序数词用于表示事物的顺序，一般由与之相应的基数词加构成但有特殊形式需th特别记忆；序数词主要用作定语，前面一般要加定冠词或物主代词如:如03811・50上.10戊
01.他们的二儿子是个博士乔治——生中找Th.hundredt.cav.tha.Georg.ha.discovere.i.hi.lifetim.i.nea.th.Alps.到的第一百个山洞在阿尔卑斯山附近注序数词前有时可用不定冠词，表示“每一，又一”如.我们将再做——遍We Lhav.t.d.i..secon.time词尾加上-thfourth,sixth
一、
二、三，特殊例，结尾字母八去九去t,d,dfirst,second,third t,e,eighth,ninth要用替;ve ffifth,twelfth将改成前面有个ty yi,the若是碰到几十几，前用基来后用序或记忆为
一、
二、三，特殊记，词尾字母八加九减逢十改为t,d,d h,e,y ie要把替，还有莫忘记f veth【语言实践内容梳理】数词分基数词和序数词基数词表示数目，序数词表示顺序L基数词为独立的单词,有其各自的形式如等11〜12one,two,three,…twelve都以结尾，单词中的两个音节都读重音如213〜19teen thirteen,fourteen…等nineteen十位数的整数都以结尾，单词中的第一个音节重读如320〜90-ty twenty,等thirty-ninety是“百”，是“千”，是“万”，4hundred thousandten thousandonehundred是“十万”，是“百万”，是千万thousandmillionten million在表示一个具体的数目时,后面都不能加5hundred,thousand,million“s”如:等在表示一个不确定的数目时,two thousand,seven millionhundred,thousand,后面要加如“成千上万“数百万等million“s thousandsof,millions of以上的基数词的读法620两位数的读法，在十位和个位之间加连字符即如a.
2.twenty-two.
3.thirty-five三位数的读法，在百位之后加“如b.and”1四位及四位以上数的读法，只在百位之后加而千位、万位以上的数后面c.and,不加任何词，只按顺序读^
0.
23.on.thousan.tw.hundre.an.thirty-four,5864327five millioneight hundredand sixty-four thousandthree hundredandtwenty-seven.序数词2第
一、第
二、第三分别为1first,second,third第四到第十九都由相应的基数词加构成如等要注意2th fourth,seventh和的拼写法和读法fifth,eighth,ninth twelfth十位数的序数词由相应的基数词去掉词尾力口构成如3y iethtwentieth,等fiftieth第二十一到九十九等，前面的十位数用基数词，后面的个位数用序数词,中4间用连字符连接如等twenty-first,twenty-ninth,seventy-eighth第一百、第一千、第一百万分别在相应的基数词后面加即:5th hundredth,thousandth,milliontho序数词之前一般要加定冠词或代词如6Th.secon.truc.i.carryin.fewe.basket.tha.th.firs.one.Thi.i.he.firs.visi.t.China.有时，序数词前用不定冠词，表示“再
一、又一”的意思如.他曾经失败一次，然后他又试了一次H.faile.once.The.h.trie..secon.time.年月日表达法3年份，每两位数读一个词如11949nineteen forty-nine1900nineteen hundred先月后日，日子要读成序数词如2月日可写成51May the first May1月日可写成38March the eighth March8先日后月，在月份之前加如3of月日51the firstof May月日38theeighthof March年月日同时出现，把年代放在最后，年代前用逗号隔开4如年月日,可写成或1949101the firstof October,1949October thefirst,1949o.时刻表达法4用基数词，按顺序读如17:30seven thirty,8:15eight fifteen,12:00twelve oclock用介词之前为分钟数须在半小时以内，包括半2past,past小时,之后为钟点数past如6:11eleven pastsix,7:15fifteen aquarter pastseven9:30thirty halfpast nine用介词前为分钟数须在半小时以上，不包括半小时,之后为下一3to,to to个钟点数，表示“差几分到几点“如6:58two toseven,7:45fifteen aquarter toeight.编号表达法5⑴用.读后加数字，数字读基数词No.No Number如用序数词词序为:序数词+名词如2the+thefirstlesson,the SecondWorld War用基数词词序为名词词首字母大写+基数词如用英语拼写，词首字母3也要大写如此种方法较常见，特另是Lesson One,Class Four,World WarTwo-U当数字较长时如Roo.306,No.
10.Middl.Schoolo.分数表达法6分子用基数词，分母用序数词，若分子大于时，分母要在序数词后加如:1s等1/3,one third,2/5,two fifths.数学运算的表达法7“加用或“减”用“乘”用“除”用plus and,minus,times,divided by,动词多用单数如3+5=8Thre.plus/an.fiv.i.eight..9-2=7Nin.minu.tw.i.seven.6X5=30Fiv.time.si.i.thirty....84-2=.。
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