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1、-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。 1 one 11 eleven 10 ten100 a hundred2 two 12 twelve 20 twenty 1，000 a thousand 3 three 13 thirteen30 thirty 1，000，000 a million 4 four 14 fourteen40 forty 10，000，000 ten million 5 five 15 fifteen 50 fifty 100，000，000 a hundred million 6 six 16 sixteen
2、 60 sixty 1，000，000，000 a billion 7 seven 17 seventeen70 seventy 8 eight 18 eighteen 80 eighty 9 nine 19 nineteen 90 ninety 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
3、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 first eleventh twentieth second twelfth thirtieth third thirteenth fortieth fourth fourteenth fiftieth fifth fifteenth sixtieth sixth sixteenth seventieth seventh seventeenth eightieth eighth eighteenth ninetieth ninth nineteenth hundredth tenth th
4、ousandth 2.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。（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）+the size(length, amount)。 例如：The earth is forty-nine times the size
5、of the moon. 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：His house is three times bigger than mine. 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： This factory is four times as big as that one. 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.),
6、 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. Both of the two rulers are broken. I
7、 want to buy a _one. A. three B. third C. forth D. /7. About _ people are in the Peoples Park at weekends. A. two hundreds B. two hundreds of C. two hundred D. hundred of数词练习一、单选1.Everyyear,_peoplegotovisittheirfactoryA.athousandof Bthousands C.thousandof D.thousandsof2.Tomhasjustfinishedwritinga_ar
8、ticle. A.nine-hundred-words B.nine-hundreds-wordC.nine-hundred-word D.nine-hundreds-words3.Lincolnwasbornon_.A.February12th,1809 B.1809,February12thC.1809,12February D.February1809,124. A_boycansingtheEnglishsongverywell. A.ten-year-old B.tenyearsold C.ten-years-old D.fifthyearsold5.Anhourlater,_min
9、isterwassenttoseethe“magiccloth”wovenbythosetwomen.A.two B.thesecond C.thetwo D.second6. AbrahamLincolnwas_PresidentoftheUnitedStates.A.16 B.the16 C.16th D.the16th7. _peoplelosttheirhomesinJapansearthquake.A.Twothousands B.Thousand C.Thousandsof D.Thousandof8. Lastyear,IvisitedachemicalfactoryinBais
10、e,thereareabout_workersinit. A.sixthousands B.sixthousand C.sixthousandsof D.sixthousandof9. About _ofthestudentsinourclasswereborninthe_.A.two-thirds,1990s B.two-thirds,1990C.two-third,1990s D.two-third;199010-Ifa=4,b=5,whatstheanswertothequestion“a+2ab+1=?”-_.A.Forty-fifthB.Forty-five C.Twenty-thr
11、eeD.Onehundredandtwenty-one.11.-Howoftendoyouexercise? -_a week.A.Two B.Twice C.Second D. three12. Doyouthinkthereisanyroomforus_?A.two B.thetwo C.second D.thesecond13. Howmanystudentsarethereinyourclass?_.A.Twentynine B.Thirtyandtwo C.Forty-five D.fifties14. ThePeoplesLiberationArmywasfounded_.A.on
12、August1,1927 B.in1927,1AugustC.onAugust1st,1927 D.inAugust1,192715. Thisclassroomis_ours. A.threetimesbigas B.asthreetimesbigasC.threetimesasbigas D.asbigthreetimesas16. Thebasketballteamofourschoolranks_inthematch.A.three B.third C.thethree D.thethird17. Ourschoolisnotverybig.Thereareonly_students.
13、A.ninehundredsof B.ninehundred C.ninehundreds D.ninehundredof18.- Howmanynewwordsaretherein_lesson?-Thereareonly_. A.five;fifth B.fifth;five C.thefifth;thefiveD.thefifth;five19. _,Coca-ColabegantoenterChinasmarket.A.In1970s B.In1970s C.Inthe1970s D.Inthe1970s20. Septemberis_monthoftheyear.A.theninet
14、h B.theninth C.nineth D.ninth21. Ittookme_togetthere.A.twohoursandahalf B.twohoursandhalfC.twohourandahalf D.twohourandhalf22. “Whatsthedatetoday?”“Its_.”A.thefourthofmay B.thefourthMay C.Mayfour D.Maythefourth二、改错：1. The sun is 93 millions miles away from the earth.2. Hundred of people attended the meeting last night.3. People lived a hard life in the forty.4. In fifties, people even can have enough food.5. Hewenttothecountrysidebyataxiwithafriend.-第 4 页-