一、基數詞的構成1-12的表述1T2各有各的形式，即one,two,three,four,five,six,seven,eight,nine，ten，eleven，twelve。13-19的表述13-19的數字皆以-teen[ti：n]結尾，其中，fourteen,sixteen,seventeen,eighteen和nineteen分別由four,six,seven,eight,nine力口后綴-teen變成的，eighteen中只保留一個t。thirteen,fifteen分別由three和five轉花而來。20-90數字的表達20-90的數字皆以-ty結尾，其中，sixty,seventy,eighty,ninety分別由six,seven,eight和nine加后綴一ty構成，eighty中只保留一個t。其他同上。4.20-99之間的數字的表達20-99之間的數詞須在十位和個位之間力連字符“-”,如twenty-five。5.百位以上的數字的表達以及讀在表達百位以上的數字時,必須在百位,十位和個位之間加and，在讀音時也應讀上and,如：104可表達為onehundredandfour,486讀作fourhundredandeighty-six。6.“萬”的表達.英語中沒有萬和億單詞，只有百(hundred),千(thousand),百萬(million),十億(billion)。英語中表示“萬”時，用10千。如：fortythousand四萬。表示“億”時需用百萬來表示。如：twohundredmillion兩億。7.,000以上的數字，從后向前數。每三位數加“，”。第一個“，”前為housand，第二個“，”前為million,第三個“，”前為,333,333,333讀為threebillion，threehundredandthirty-threemillion,threehundredandthirty-threethousand,threehundredandthirty,thousand,million前有若有具體數字時，要用單數形式，但如果他們后面有of,則要用復數形式。同時，前面不能再加具體的數目。二、基數詞的用法基數詞在句中主要用作主語、賓語、定語、表語、同位語,例如：ThirtyofthemarePartymembers.(主語)Howmanywouldyoulike？語)Howmanywouldyoulike？Threeplease.（作賓語）ThenineboysarefromTianjin.(定語）Sixplusfouristen.(表語)Wefourwillgowithyou.(同位語)表示一個具體數字時‘hundred,thousand,million不用復數；表示一個不確定數字時則用復數。例如：Ourcountryhasapopulationof1,300millionpeople.Therearethreethousandstudentsinourschool.Afterthewar,thousandsofpeoplebecamehomeless.Maizeisthemostimportantfoodcropformillionsofpeopleintheworld.Theyarrivedintwosandthrees.表示“……十”的數詞的復數形式可用來表示人的歲數或年代‘例如：Heisinhisearlythirties.Hediedstillinhisforties.Thistookplacein1930s.(4)表示時刻用基數詞。例如：Wegetupatsix.Theworkersbeginworkateight.表示“幾點過幾分，用past,但須在半小時以內。例如：tenpastten,aquarterpastnine,表示“幾點差幾分用to,但分數須在半小時以上。例如：twentytonineaquartertoten表示―幾點幾分用基數詞。例如：sevenfifteen,eleventhirty,ninetwenty序數詞的構成及用法一、序數詞的構成第一，第二，第三分別為first,second,third.第四到第十九都有相應的基數詞加the構成，有幾個特殊，即fifth,eighth,ninth,twelfth.3第幾十把y改為i加eth..twentieth,ninetieth4序數詞之前要加定冠詞或代詞。但序數詞表名詞時，可不用冠詞。Whowonfirst?序數詞表“再一”，“又一”時不用定冠詞，只需在前面加aHefailedonce.Thenhetriedasecondtime.5序數詞的縮寫形式是在數字后面直接加上序數詞最后兩個字母構成。1st,2nd,3rd,4th,21st,22nd,34th6100以上的序數詞的表示方法第100為100th(讀作onehundredth),101st讀作onehundredandfirst,其他的依次類推二.序數詞的用法(1)序數詞主要用作定語，前面要加定冠詞the,例如：JohnlivesoThefirsttruckiscarryingafootbaskets．Johnlivesonthefifteenthfloor．序數詞有時前面可加不定冠詞a來表示再，又這樣的意思，例如:ShallIaskhimathirWe'llhavetodoitasecondtime．ShallIaskhimathirdtime？WhenIsatdown，afourthmanrosetospeak．注意不規(guī)則形式：onefirst,twosecond,threethird,fivefifth,eighteighth,nineninth,twelvetwelfth。(4)表示年，月，日時，年用基數詞表示，日用序數詞表示。例如：1949年十月一日讀作:October(the)first,nineteensixty2004年九月十日讀作：September(the)tenth,twothousandandfour表示分數時，分子用基數詞表示，分母用序數詞表示。分子大于1時，分母加-s。例如：threefourths,onesecond,twofifths序數詞縮寫形式：firstf1stsecondf2ndthirdf3rdfourthf4thtwenty—secondf22nd分數的表示法1分數的表示法：分子用基數詞，分母用序數詞，當分子大與一時，分母用復數形

式。2|3twothirds3|5threefifths式。2整數與分數之間用and連接。One/anhourandahalf3分數的用法結構為“分數+0f+the+名詞”表示“。。。。的幾分之幾”，當其作主語時，謂語動詞的單復數取決于短語中名詞的復數Ab0utstudentsin0urclasscandescribethatplaceinEnglish.A.three-fifthsB.three-fifthC.third-fiveD.third-fifths2.Ninep0undsaweek?That'sveryg00d.hundred0fB.hundreds0fC.hundredsD.hundredWe0ftenhavesp0rtsafterclass,andIliket0playbasketball.aB.anC.theD.不填【中考演練】一..單項填空Thism0rningIhadeggandab0ttle0fmilkf0rmybreakfast.anB.aC.theD./What'sthematterwithy0u?Icaughtbadc0ldandhadt0stayin.A.a;/B.a;theC.a;aD.the;theHavey0useenpen?Ileftitherethism0rning.Isitblack0ne?IthinkIsawits0mewhere.A.a;theB.the;theC.the;aD.a;asunisshiningbrightly.A.AB.AnC.TheD./Thereis“h”inthewordhour.A.aB.theC.anD./DidyouenjoyyourstayinXian?Yes.Ihadwonderfultime.A.aB.anC.theD./sunisbiggerthanearth.A.A;theB.A;anC.The;anD.The;theThereisappleandsomepearsonthetable.A.theB./C.aD.anDavidhascat.It'sverynice.A.aB.anC.theD./10.I'mreadingnovel.Itisinterestingstory.A.a;anB.a;aC.the;theD./;anItissaidthatSARShaskilledmorethanpeopleworldwide.A.threehundredsB.threehundreds'C.threehundred'sD.threehundredHowmanyworkersarethereinyourfactory?Therearetwo.A.hundredsB.hundredC.hundredofD.hundredsofWhichisthesmallestnumberofthefour?A.Two-thirdsB.AhalfC.AquarterD.Three-fourthsWhatdoyouthinkofawar,LiMing?I'venoidea.Butit'safactthatpeoplehadtoleavetheirhometownduringtheWaronIraq.

A.threethousandsB.thousandofA.threethousandsB.thousandofC.thousandsofD.severalthousandsWeallthinkthatthecenturywillbringusmorehopes.A.twenty-firstB.twentieth-firstC.twenty-oneD.twentieth-oneCanyouwritethenumbereighty-fivethousand,sixhundredandtwenty-six?Yes,itis.A.856620B.85626C.58662D.58626WhenwasthePRCfounded?Itwasfoundedon.A.July1,1921B.October1,1949C.August1,1927D.May1,1922Iwas8yearsoldwhenmyfatherwas31.Thisyearmyfatheristwicemyage.HowoldamI?A.21B.22C.23D.24ChinesearelookingforwaystolearnEnglishwellbeforeBeijing2008Olympics.A.ThousandB.ThousandsC.ThousandofD.ThousandsofBothofthetworulersarebroken.Iwanttobuyaone.A.threeB.thirdC.forthD./數詞跟蹤練習1.Therearedaysinayear.A.threehundredsandsixty-fivethreehundredandsixtyfivethreehundredandsixty-fivethreehundredsandsixty-fivevolunteerssentbookstoamountainvillageschoolonChildren'sDay.A.twohundredsofB.twohundredofC.twohundredsD.twohundredwenttocollegeinandbegantoworkin.A.the1990s;twentythe1980s,twentieth1980;mytwenties1980s,mytwentiesHepburnpassedawaypeacefullyinher(sixty).Theearthquakehappenedonthe(20)ofApril.Decemberisthe(twelve)monthofayear.hadabigfamilycelebrationonmygrandpa's(ninety)birthday.8.OnJanuary9ththisyear,LondonUndergroundcelebrateits(onehundredandfifty)birthday.thirdsofthewater(be)polluted.thirdsofstudents(like)football.AboutofthestudentsinGradeNinethisyearwereborninthe.A.threefive;1996.B.threefifths;1990sC.thirdfifth;1997.D.thirdfifths;1990sTherearedays,inaweekandTuesdayisdayof'theweek.A.seven,thirdB.seven,thethirdC.seventh,threeD.theseventh,threePleaseturntoPageandlookatthepictureinthisunit.A.twentieth;oneA.twentieth;oneB.Twenty;oneC.twentieth;firstD.Twenty;firstHowwasyourweekend?Great!Itwasmygrandfather'sbirthday.Weenjoyedourselves.A.seventyB.seventiethC.theseventiethD.seventeenthThechairpersonreceivedaboutthreeapplicationstojointheBirdwatchingClub.hundredsofhundredofD.hundredsHewrotehisnovelwhenhewas.A.five;fiftiesB.fifth;fiftyC.fifth;fiftiethvisitorscometoXingyiduringMayDayholidayseveryyear.A.ThousandsofB.TwothousandsC.ThousandofD.ThousandAboutofthestudentsin