中考英语数词讲解教案

第1页共8页中考英语数词讲解教案基数词（一）基本概念：表示数目多少的词叫基数词。1.1-12独立成词：one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve2.13-19(+teen)：thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen3.20-90(整十位数+ty)：twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety4.21-99间的两位数，先说“十位”，再说“个位”，中间要加连字符“-”5.101-999之间的三位数，先说“百位”，再加and，再加末尾两位数。6.1000以上数，使用计数符号，每三位加以逗号，从第一个逗号起单位依次为thousand,million,billion.“万”表达为tenthousand例：579fivehundredandseventy-nine802eighthundredandtwo4,352fourthousandthreehundredandfifty-two14,615fourteenthousandsixhundredandfifteen123,456,789onehundredandtwenty-threefourhundredandfifty-sixthousandsevenhundredandeighty-nine1,234,567,899billionmillionthousandand-1,234,567,899billionmillionthousandand-第2页共8页（二）基数词用法：1.从句子成分上分析，基数词在句中可用作主语、宾语、表语等。Fourofthemwenttothefactory.（主语）Iwanttwo.（宾语）Myclassmateiseighteen.（表语）2.编号的事物用基数词。TodaywearegoingtostudyLessonFive.HelivesinRoom801.3.表示“年、月、日”时年份用基数词，日期用序数词，其顺序由小到大。Theaccidenttookplacein2006.这次事故发生在2006年。4.钟点表达法1.先点后分，顺读法。如：8：53eightfifty-three2.先分后点，倒读法：前半小时用“分钟数+past+已过钟点数”；后半小时用“(60-分钟数)+to+下一个钟点数”；正好半点用“halfpast+已过钟点数”；一刻钟用“quarter”。7:20twentypastseven;6:35twenty-fivetoseven;1:58twototwo;8:30halfpasteight;9:15aquarterpastnine;9:45aquartertoten.5.用于加减乘除的数字用基数词。Oneplustwoisthree.Fivetimessixisthirty.6.表示百分数用基数词。Thirtypercentofthemiswater.第3页共8页7.表示分数时，分子用基数词，但分母要用序数词；若分子大于1，分母上的序数词要用复数形式。Twofifthsofthebookaremine.8.表示带有小数的词用基数词。小数点前的整数按基数词的规则表示，小数点写作point，小数点后的数字应按数字直接表示出来。18.38可写成eighteenpointthreeeight.9.数词+名词(+形容词)作定语，名词用单数形式。Atwenty-one-year-oldgirlisbehindme.10.两组与数词有关的介词短语：(1)in+定冠词the+数词的复数形式，表示年代。inthe1870s/1970s(2)in+物主代词+数词的复数形式，表示某人的年龄。inone’sthirties在某人三十多岁的时候有时在物主代词后面可加上形容词early或late使含义更确切一些，inhisearlythirties.注意：“十几岁”要用inone’steens，不可以说inone’stens。11.数词前加every，表达“每一段时间或每隔一段……”everytendayseveryfourweeks每10天/每隔9天每4周/每隔3周everyninthdayeverythirdweek第4页共8页（三）基数词考点：1.基数词表示顺序编号时：名词+基数词，此时两个词的首字母都要大些。ClassThreeRoom5LessonOne2.确数与概数的表达。确数：基数词+单位+复数名词：twohundredstudents200名学生概数：单位加S+of+复数名词：thousandsofvisitors成千上万的游客3.“整十加S”用于表示“几十年代”或“某人几十多岁时”Inthe1960s,peoplehadtoleadapoorlife.在20世纪60年代，人们不得不过着贫困的生活。Heinventedmanythingsinhistwenties.他在20多岁时就发明了很多东西。序数词（一）基本概念：表示顺序先后的数词。序数词大多由基数词变形而成，需掌握了基变序的方法：1.口诀记忆：基变序，有规律，词尾加上th;一二三，单独记，词尾分别t，d，d；八减t，九去e，f来把ve替；ty如果做结尾，直接把y变ie；若遇几十几，只变个位就可以。注意：four—fourteen—forty—forty-twonine—nineteen—ninety—ninety-ninefourth—fourteenth—fortieth—forty-secondninth—nineteenth—ninetieth—ninety-ninth第5页共8页（二）序数词的用法：1.序数词主要用作定语、表语，前面要加定冠词the。Thefifthlessonisveryeasytolearn.YouarethefirstoneIbelieve.（三）序数词的考点：1.序数词表示顺序时，前要加the，后面接单数名词。Thesecondpictureisverybeautiful.ThefourthstudentcomesfromAmerica.2.表示日期中的“日”。2016年9月19日，表示为“September19th,2016”;读作：Septemberthenineteenth,twothousandandsixteen3.序数词的缩写：1st2nd3rd4th20th63rd78th4.序数词表示编号顺序时：UnitOne=thefirstunitPartTwo=thesecondpart几种特殊数词（一）普通分数：子基母序，分子1，分母+S1/3:onethird2/3:twothirds1/2:读作ahalf或onehalf1/4读作aquarter或onefourth（二）百分比：基数词+percent(percent)第6页共8页2%读作twopercent27%读作twenty-sevenpercent（三）习惯表达：oneandahalfapples=oneappleandahalf一个半苹果halfanapple半个苹果oneortwoapples=oneappleortwo一两个苹果10:30halfpastten10:25twenty–fivepastten9:45fifteentoten或aquartertoten加减乘除---数字的运算（一）基础知识：=:is/equals+:plus-:minus*:multipliedby/:dividedby都是介词。加法：3plus9is/equals12.减法：9minus3is/equals6.乘法：3multipliedby9is/equals27.除法：9dividedby3is/equals3.（二）句型：通常用“加减乘除”的动词原形来开头，构成祈使句，命令做题者。AddAandBSubtractAfromBMultiplyAbyBDivideAbyBIfweadd2to5,wecanget7.Multiply2by3,please.练习一、单选1.Aboutfilmswereshownduringthe5thInternationalFilmFestival.第7页共8页AtwohundredofBtwohundredsofCtwohundredDtwohundreds2.We’llhaveaholiday.WhataboutgoingtotheWestLake?AtwodaysBtwo-dayCtwo-daysDtwo-days’3.Nowchildren,turntopageandlookatpictureinLessonTwo.Atwentieth…oneBtwenty…oneCtwentieth…thefirstDtwenty…thefirst4.Duringtheseven-dayMayDayholidays,familieswentsightseeing.AthousandBthousandsCthousandsandthousandsDthousandsof5.DuringWorldWarii,aJewish(犹太的)ladywasprotectedbyalocalfamilyinShanghaiinher.AfiftiesBfiftyCfiftiethDthefiftieth6.Theone-year-oldboyissmartandheisabletocountuptothe________number.A.hundredB.hundredsC.hundredthD.hundredsof7.HetookuplearningGermaninhisearly________.A.sixtyB.sixtiethC.sixtiesD.thesixties8.Peoplewaste________electricityeveryday.It’stimetotakeaction.A.alargenumberofB.hugeamountsofC.manyD.quitealot9.________studytripintheU.S.haschangedmyfriendalotinhislifestyle.A.ThreeyearB.ThreeyearsC.Three-yearsD.Threeyears’10.________peopletookpartinthesearchforthelostbabyinChangchun.A.ThousandsofB.twothousandsC.thousandofD.twothousandsof11.Thecompanydecidedtospendaboutfive________yuanbuildingaschoolforthechildreninwesternChina.第8页共8页A.millionsB.millionsofC.millionofD.million12.After________talk,theydecidedtobuyanewflatwithalargesitting-room.A.twohourB.twohours'C.two-hoursD.twohours13.TheHighSpeedRailTrainsbetweenShanghaiandBeijingcanrunover________kilometersanhour.A.threehundredB.hundredofC.threehundredsD.threehundredsof参考答案1-5CBDDA6-10CCBDA11-13DBA