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精品文档,仅供学习与交流,如有侵权请联系网站删除初中英语――数词(一)基数词:用来表示数目,或者说表示数量的词叫基数词。最基本的基数词如下表所示。1one11eleven10ten100ahundred2two12twelve20twenty1,000athousand3three13thirteen30thirty1,000,000amillion4four14fourteen40forty10,000,000tenmillion5five15fifteen50fifty100,000,000ahundredmillion6six16sixteen60sixty1,000,000,000abillion7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90ninety基数词的用法:1.基数词在句中的作用基数词的作用相当于名词和形容词。2.Hundred,thousand,million,dozen,score这些词前面如有表示具体数字的词,它们不能加“s”,如果没有具体数字则须加“s”,并要与of短语连用。(二)序数词表示顺序的词,叫序数词。序数词用来表示数词顺序。1.序数词的构成:除特殊情况外,序数词一般都由相应的基数词加后缀-th构成。请见下表:第一到第十第十一到第十九第二十以上firsteleventhtwentiethsecondtwelfththirtieththirdthirteenthfortiethfourthfourteenthfiftiethfifthfifteenthsixtiethsixthsixteenthseventiethseventhseventeentheightietheightheighteenthninetiethninthnineteenthhundredthtenththousandth2.序数词的用法序数词表顺序,主要作定语,其前面须加上定冠词the,此外,也作主语、宾语、表语和定语等,这时,被它所修饰的名词往往被省略。(三)分数表达法先写基数词表示分子,后写序数词表示分母,如果分子大于1时,分母用复数。(四)小数表达法小数点前的整数按基数词的规则表示,小数点写作point,小数后的数字应按其数字直接表示出来。【精品文档】第4页\n精品文档,仅供学习与交流,如有侵权请联系网站删除(五)百分数表达法在数词后加percent。(六)表示倍数1)…几倍大小(长短,数量)=…几倍(或分数)+thesize(length,amount)。例如:Theearthisforty-ninetimesthesizeofthemoon.地球是月球的49倍。2)…比…几倍=…倍数(或分数)+形容词(副词)比较级+than+被比部分。例如:Hishouseisthreetimesbiggerthanmine.他的房子比我的房子大三倍。3)…是…倍=…倍数(或分数)+as+形容词+as+被比部分。例如:Thisfactoryisfourtimesasbigasthatone.这个工厂是那个工厂的四倍。(八)年、月、日和时间的表达法1.年份用基数词表达,分两位一读,年份前用介词in。2.月份的第一个字母要大写,有些月份名称有缩写形式。一月January(Jan.),二月February(Feb.),三月March(Mar.),四月(Apr.),五月May,六月June,七月July,八月August(Aug.),九月September(Sep.),十月October(Oct.),十一月November(Nov.),十二月December(Dec.)。3.日期的表达要用序数词,读时前面要加定冠词the,介词要使用on。4.in+定冠词the+数词的复数形式,表示年代。基础练习:1.582:2.6220:3.2012年9月30:4.三等奖:5.五分之三:6.Bothofthetworulersarebroken.Iwanttobuya_______one.A.threeB.thirdC.forthD./7.About______peopleareinthePeople’sParkatweekends. A.twohundreds B.twohundredsof C.twohundred D.hundredof数词练习一、单选1. Every year, _____ people go to visit their factory A. a thousand of B thousands C. thousand of D. thousands of2.Tom has just finished writing a _________ article. A. nine-hundred-words B. nine-hundreds-word 【精品文档】第4页\n精品文档,仅供学习与交流,如有侵权请联系网站删除 C. nine-hundred-word D. nine-hundreds-words3.Lincoln was born on ________. A. February 12th, 1809 B. 1809, February 12th C. 1809, 12 February D. February 1809,12 4.A _______ boy can sing the English song very well. A. ten-year-old B. ten years old C. ten-years-old D. fifth years old5.An hour later, _____ minister was sent to see the “magic cloth” woven by those two men. A. two B. the second C. the two D. second 6.Abraham Lincoln was _______ President of the United States. A. 16 B. the 16 C. 16th D. the 16th7._______ people lost their homes in Japan’s earthquake. A. Two thousands B. Thousand C. Thousands of D. Thousand of8.Last year, I visited a chemical factory in Baise, there are about _____ workers in it. A. six thousands B. six thousand C. six thousands of D. six thousand of9.About_______of the students in our class were born in the________. A. two-thirds, 1990s B. two-thirds, 1990 C. two-third, 1990s D.two-third;199010---If a=4, b=5, what’s the answer to the question “ a + 2ab +1 =?” --- ____ . A. Forty-fifth B. Forty-five C. Twenty-three D. One hundred and twenty-one.11.----How often do you exercise? ---________aweek. A. Two B. Twice C. Second D.three12.Do you think there is any room for us ________ ? A. two B. the two C. second D. the second13.How many students are there in your class? ________. A. Twenty nine B. Thirty and two C. Forty-five D. fifties14.The People's Liberation Army was founded _______. A. on August 1, 1927 B. in 1927, 1 August C. on August 1st, 1927 D. in August 1, 192715.This classroom is ________ ours. A. three times big as B. as three times big as C. three times as big as D. as big three times as 【精品文档】第4页\n精品文档,仅供学习与交流,如有侵权请联系网站删除16.The basketball team of our school ranks ________ in the match. A. three B. third C. the three D. the third17.Our school is not very big. There are only ________ students. A. nine hundreds of B. nine hundred C. nine hundreds D. nine hundred of18.---How many new words are there in ________ lesson? ---There are only _________. A. five; fifth B. fifth; five C. the fifth; the five D. the fifth; five19.________, Coca-Cola began to enter China's market. A. In 1970's B. In 1970s C. In the 1970s' D. In the 1970s20.September is _________ month of the year. A. the nineth B. the ninth C. nineth D. ninth 21.It took me ____ to get there. A. two hours and a half B. two hours and half C. two hour and a half D. two hour and half 22.“What's the date today?” “It's ___.” A. the fourth of may B. the fourth May C. May four D. May the fourth二、改错:1.Thesunis93millionsmilesawayfromtheearth.2.Hundredofpeopleattendedthemeetinglastnight.3.Peoplelivedahardlifeintheforty.4.Infifties,peopleevencanhaveenoughfood.5.He went to the countryside by a taxi with a friend.【精品文档】第4页