初中英语数词专项

1、数词讲解专项练习1数词的讲解一、定义：表示数目或顺序二、分类：分为基数词和序数词两种。表示数目或数量多少的词叫基数词；表示数目顺序的词叫序数词。三、基数词的构成：1） 1-12的基数词是独立的单词，即：one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve。2） 13-19的基数词以-teen结尾。如：fourteen,seventeen等，但13,15,18较特殊，13thirteen,15fifteen,18eighteen。3） 20-90的整十位均以-ty结尾。如：sixty,ninety,但20,30,40,50,

2、80较特殊，20twenty,30thirty,40forty,50fifty,80eighty。4）十位数与个位数之间要加连字符号-,如：28-twenty-eight,96-ninety-six。5）百位和十位（若无十位则和个位）之间加and,如：148onehundredandforty-eight406fourhundredandsix6） hundred（百），thousand（千），million（百万），billion（十亿）等前面即使有具体的数词，several,some,manytil不能在它彳门的后面加-s。如：sixhundred,eightmilliono如果表示不确定

3、数目时，用hundredsof/thousandsof/millionsof/billionsof+名词复数，前面不能再加数字。7） 1000以上的数字，从后往前数每三位加一个逗号，第一个逗号前为千（thousand）,第二个逗号前为百万（million）,第三个逗号前为billion（十亿）。英语中无方”这个词，我们可以用几十个千（thousand）”表示几万，”几百个千(thousand)表示几十万。如：2,510=twothousandfivehundredandten84,296=eighty-fourthousandtwohundredandninety-six274,350=two

4、hundredandseventy-fourthousandthreehundredandfifty。四、序数词的构成：1)序数词一般是以与之相应的基数词尾加-th构成，如：fourth,tenth,但以下的这些基数词变为序数词时，有特别之处。Onefirst,twosecond,threethird,fivefifth,nineninth,twelvetwelfth2) 以_ty结尾的单词，要先变y为i,在加-eth.。如：thirtythirtieth,fifty-fiftieth3)以one,two,three等结尾的多位数词，要将个位数变成序数词。如：twenty-onetwenty-

5、first,onehundredandoneonehundredandfirst注意：序数词前常用定冠词，有时还可以用不定冠词a/an则表示又一的意思。(没有具体范围的限制)如：Mr.Brownhasasecondcar.布朗先生另外还有一辆车。Hehastriedasecondtime.他又尝试了一次。五、数词的应用1)时刻的表示：小时、点钟、分钟、秒钟要用基数词。“几点钟”用基数词加oclock。oclock可省略。如：5点钟-five(oclock)几低过几分，#30用介词past。如：7:15fifteen/aquarterpastseven7:30halfpastseven“差几分几

6、点用介词to。如：7:40twentytoeight7:45fifteen/aquartertoeight。日常生活中的时间读法常常简化，直接按基数词的顺序读。如：7:05sevenofive7:15sevenfifteen。2）年月日的表示：年份用基数词，如：nineteenninety-nine年一nineteenhundred20xx年一twothousand年一nineteenofive;年用基数词，日用序数词。如:年6月8日写作June8,1998读作:Junetheeighth,nineteenninety-eight或theeighthofJune,nineteenninetye

7、ighto3）世纪、年代表示法，如：（在）90年代（in）thenineties（在）19世纪（in）thenineteenthcentury（在）18世纪30年代（in）the1730s或inthe1730s4）编号的表示： 基数词放到名词的后边，该名词一般要大写；序数词放到名词的前面，加定冠词。Lesson1/thefirstlesson第课Row3/thethirdrow第三排 BusNo.3=theNo.3bus3路公共汽车。 表示住所时不用No.如:Room302读作:roomthreeotwo302房间。 如果编号的数词比较长，一般用基数词。如：Page457第457页。 电话号码

8、，用基数词，如:3855633-threeeightdoublefivesixdoublethree。5）分数的表达：分子用基数词，分母用序数词，分子大于1，分母则加s。如：1/3onethird2/3twothirds1/2a/onehalf1/4onefourth或a/onequarter3/4threefourths或threequarters6）表示有小数的词用基数词，如：5.5fivepointfive12.135twelvepointonethreefive7）表示百分数，如：5%:fivepercent0.8%zeropointeightpercent注意:分数、百分数与主谓一致

9、当分数、百分数修饰可数名词的复数时，谓语动词用复数形式；当分数、百分数修饰不可数名词时，谓语动词用单数形式。如：我们学校百分之八十的学生来自河南。ThreefourthsofthestudentsinmyclassareinterestedinEnglish.我们班四分之三的学生对英语感兴趣。Twothirdsofthewaterontheearthisseawater.地球上三分之二的水是海水。8）其他用法，如：基数词+单数名词+形容词构成合成形容词。如：afive-year-oldboy个五岁的男孩14 / 15an800-metre-longbridge一座800米长的桥girls00r

10、e relay race女子400米接力具体数词+metre(s)/kilometre(s)/kilo(s)long/high/tall/deep/away等。如：TheChangjiangRiveris6,300kilometres2门木江长6300公里。 表示几十岁”用基数词的复数形式，如：inhisthirties在他三十几岁时 倍数的表达：一倍用once，两倍用twice，两倍以上用基数词+times。如:fivetimes5倍补充:倍数的表示法:1 .表示几倍大小（长短;数量）”由，倍数+thesize（length,amountwidthageheight.）+of结构组成。如:T

11、heearthisforth-ninetimesthesizeofthemoon.地球的大小是月亮的四十九倍。2 .表示“，比,，大几倍”由倍数+形容词（副词）比较级+than+被比较部分结构组成。如：Thisboxisthreetimesbiggerthanthatone.这个箱子比那个箱子大三倍。(这个箱子是那个箱子的四倍。)数词练习3 )1.Everyyear,peoplegotovisittheirfactoryA.athousandofBthousandsC.thousandofD.thousandsof()2.Tomhasjustfinishedwritingaarticle.A.

12、nine-hundred-wordsB.nine-hundreds-wordC.nine-hundred-wordD.nine-hundreds-words()3.peoplelosttheirhomesinJapansearthquake.A.TwothousandsB.ThousandC.ThousandsofD.Thousandof()4.Lastyear,IvisitedachemicalfactoryinBaise,thereareaboutworkersinit.sixthousandsB.sixthousandC.sixthousandsofD.sixthousandof()5.

13、Aboutofthestudentsinourclasswereborninthe.A.two-thirds,1990sB.two-thirds,1990C.two-third,1990sD.two-third,1990()6.NowadaysofbusinesslettersarewritteninEnglish.A.twothirdB.twothirdsC.twothreeC.secondthree()7.Ifa=4,b=5,whatstheanswertothequestiona+2ab+1=?一A.Forty-fifthB.Forty-fiveC.Twenty-threeD.Onehu

14、ndredandtwenty-one()8.Howoftendoyouexercise?一aweek.A.TwoB.TwiceC.SecondD.Three()9.Theteachersaidthat_oftheboyswouldtakepartinthetalentshow.A.threefiveB.threefivesC.thirdsfifthsD.threefifths()10.Tomorrowistheboysbirthday.A.seventhB.sevenC.seventeenD.aseventh()11Whichisthebiggestnumberofthefour?A.One-

15、thirdB.Two-thirdsC.AhalfD.Aquarter()12.Excuseme,wherecanIbuyajacket?YoucangototheMensWearSectiononthefloor.A.twoB.twiceC.secondD.three()13._ofthelandiscoveredwithtreesandgrassinPingjiang,Yueyang.A.ThreefivesB.ThreefifthsC.ThreefifthD.Threesfifth()14.Septemberismonthoftheyear.A.ninthB.nineC.thenineD.

16、theninth()15.Howwasyourdayoffyesterday?Perfect!Itwasmygrandmasbirthday.Wehadabigcake.A.eightyB.eightiethC.theeightiethD.theeightieth()16.Excuseme,howcanIgettothemuseum?一Sorry.Itsmytimetobehere.A.oneB.firstC.onceD.two()17.Youcanseeifyougooutatnight.A.millionstarsB.thousandofstarsC.hundredsstarlionofs

17、tars()18.Isthisyourvisittomyhometown,Zunyi?一No.Ivebeenhereformtimes.A.oneB.thefirstC.firstD.twice()19.Morethanninestudentsaredoingsportsnow.A.hundredsB.hundredofC.hundredD.hundredsof()20.Now,everybody,pleaseturntoPageandlookatthepicture.A.Fifth;fiveB.Five;fifthC.Fifth;fifthD.Five;five()21.Forbreakfa

18、st,Iusuallyhaveandtwopiecesofbread.A.acupofmildhalfB.halfacupofmilkC.ahalfmilkcupD.halfamilkcup()22.ThegovernmentofChongqingisbuildingcheapandgoodhousesforthepeople.A.thousandB.thousandsC.thousandofD.thousandsof()1.Thereareaboutstudentsinourschool.A.twothousandofB.twothousandsC.twothousandsofD.twoth

19、ousand()2.Therearestudentsinourgrade.A.threehundredsandforty-fiveB.threehundredandfortyfiveC.threehundredforty-fiveD.threehundredandforty-five()3.Sundayisdayoftheweek.A.thefirstB.oneC.heseventhD.thesevenA.athalfpasteightB.athalfpassedeitherC.inhalfpasteightD.onhalfpasteight()5.Ifyouwanttogotothecine

20、ma,take.A.busNo.theninthB.theNo.9busC.No.9thebusD.No.theninthbus()6.TheGreenscametoChina.A.in1984October27B.inOctober27,1984C.on27,1984OctoberD.onOctober27,1984()7.Thestorytookplacein.A.nineteencenturiesB.nineteencenturyC.thenineteenthcenturyD.nineteenthcentury()8.IwastoldtheywouldstayinChinafor.A.o

21、neandahalfyearsB.oneandahalfyearC.oneandhalfyearsD.onehalfandoneyear()9.Tomorrowwearegoingtolearn.A.LessonSecondB.theLessonTwoC.LessonTwoD.secondlesson()10.Ithinkthatthefirstdayofspringis.A.twenty-twoofMarchB.twenty-secondonMarchC.twenty-twoinMarchD.thetwenty-secondofMarch()11.letteroftheword“restau

22、rantisn”A.TheninethB.NinethC.TheninthD.Ninth()12.Wetalkedfor.A.halfahourB.halfhourC.anhourhalfD.halfanhour()13.Thebuswillleaveatthisafternoon.A.threefifteenB.threeandfifteenC.threequartersD.fiftytothree()14.Theearthisthesizeofthemoon.A.49thetimesB.49timesC.49timeD.fourty-ninetimes()15.Itsaruler.A.tw

23、o-feet-longB.twofeetlongC.two-foot-longD.two-foot-long()16.studentsareplantingtrees.A.SeveralhundredsB.SeveralhundredC.FivehundredsD.Fivehundredof()17.tofinishquickly.A.NoeverystudentwantsB.NoeverystudentwantC.NoteverystudentwantsD.Noteverystudentwant()18.ago,ourcountrywascoveredbythickforests.A.Sev

24、eralmillionofyearB.SeveralmillionyearC.SeveralmillionyearsD.Severalmillionofyears()19.Theweightofthemoonisonlyaboutofthatoftheearth.A.oneeightyB.oneofeightyC.onetheeightiethD.oneeightieth()20.Its11:45.Yes,its.A.fifteenpasttwelveB.fifteenfromtwelveC.aquarterpasteightiethD.aquartertotwelve()21.Whatdat

25、eisit?Its.A.Julytwentieth-firstB.ofJulytwenty-firstC.thetwenty-firstofJulyD.aquartertotwelve()22.-,please?-ItwasApril25th.A.HowoldareyouB.WhatwasthedateyesterdayC.WhattimewasitD.Whatdayisittoday()23.Ihavethingstodo.IcantplayA.many,nomoreB.alotof,anymoreC.much,moreD.much,anymore()24.Ihaveapaperonmyde

26、sk.A.littleB.lotC.lotsD.littleof()25.Thisis.A.thequestionthirtyB.thequestionthirteenC.thirtyquestionD.questionthirteen()26.oftheworkhasbeendone.A.TwothirdB.TwothreeC.TwothirdsD.Twothird()27.Itsnow.Letshurry.A.halfpassedsixB.thirtypassedsixC.halfpasssixD.halftoseven()28.Whatsthedatetoday?Its.A.theJun

27、efourthB.thefourthofJuneC.ofJunethefourthD.fourthJune()29.Nextweekweregoingtolean.A.unit5B.theunit5C.Unit5D.5Unit()30.Doyouhavemuchworktodothisweekend?Yes,Ihavetowriteapaper.A.two-thousand-wordB.two-thousand-wordsC.two-thousands-wordD.two-thousands-words()31.Thetreeistall.A.forteenfeetB.fourteenfeet

28、C.fourteenfootD.fourtyfoot()32.Fiftyplus.A.fourtyisninetyB.fortyisninetyC.thirtyisninetyD.fourtyisninety()33.Therearestudentsinthisschool.A.fourhundredfifty-twoB.fourhundredsfifty-twoC.fourhundredandfifty-twoD.fourhundredandfiftytwo()34.Myhomeisaboutawayfromtheschool.A.threehundredmetreB.threehundre

29、dsmetresC.threehundredmetresD.threehundredsmetre()35.Decemberisandlastmonthisayear.A.thetwelvethB.twelvethC.thetwelfthD.twelfth()36.oftheteachersintheschoolarefromcolleges.A.ThreequartersB.Two-thirdC.TwofifthD.Two-nineths()37.Therearetwoworldwarsduringcentury.A.thetwentiesB.thetwentiethC.twentiesD.t

30、wentieth()39.Intheforties,hisfatherservedintheNewArmy(新四军),whilethismotherworkedintheRouteArmy.(/I路军)A.thetwenty-firstlessonB.LessonTwentyFirstC.the21thlessonD.Lesson21th()40.Hewillstayherefor.A.oneandhalfmonthB.oneandahalfmonthC.onemonthsandhalfD.oneandahalfmonths()41.-Whatsthedattoday?-Its.A.nineB

31、.MondayC.June5D.11:00()42.-Wouldyouliketoeatapples?-No,thankyou.A.moretwoB.twomoreC.twoanotherD.twoelseA.oneortwodaysB.aortwodaysC.oneandtwodaysD.adayandtwo()44.-Howoftendoyouwritetoyourparentsabroad?-.A.TwiceamonthB.SecondtimesamonthC.AsecondtimeamonthD.Secondatimeamonth()45.peoplediedinthetraffica

32、ccidentsintheworld.A.ThousandofB.ThousandsofC.TenthousandsofD.Tenthousandof()46.Whatisthetime?Its.(4:25)A.fourtwenty-fiveB.fourpasttwenty-fiveC.twenty-fivetofourD.fourtwentyfive()47.Mr.Smithlivesonfloor.A.fivethB.fifthC.thefivethD.thefifth()48.HebegantolearnEnglishinhis.A.fiftyB.fiftiethC.fiftiesD.f

33、ifth()49.Hissisterwasborn.A.in1998,October21B.on1998,October21C.inOctober21,1998D.onOctober21,1998()50.Whenhewas,helefthometoworkindifferentcities.A.inhistwentyB.athistwentyC.inhistwentiesD.athistwenties()51.Imthanyou.A.fiveyearsolderB.fifteenyearoldC.fifteenyearsD.fifteenold()52.Howoldareyou?-1m.A.fifteenyearsoldB.fifteenyearoldC.fifteenyearsD.fifteenold()53.-Howmanyteachersarethereinyourschool?-,butImnotsure.A.HundredsB.HundredC.HundredsD.Onehundred()54.Aboutofthebooksinourschoollibraryarewritte