中考数词专项复习课件.ppt

中考对数词的考查：1.掌握基数词、序数词的构成及用法2.掌握hundred,thousand,million,billion等词的用法3.熟练掌握年、月、日的表达法和常 用的数字的表达法。1.1.表示表示数目多少数目多少的数词叫做的数词叫做 基数词基数词：one two three ninety-five2.2.表示表示顺序先后顺序先后的数词叫做的数词叫做 序数词序数词：first second third fifteenth1.112独立成词，需逐个记忆：独立成词，需逐个记忆：one,two,three,four，five,six,seven,eight,nine,ten,eleven,twelve2.1319的基数词以的基数词以-teen结尾：结尾：thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen3.2090的基数词都以的基数词都以-ty结尾：结尾：twenty,thirty,forty，fifty,sixty,seventy,eighty,ninety 4.2199的写法：十位数的写法：十位数+连字符连字符+个位数个位数 thirty-six5.101999的构成：百位和十位数之间用的构成：百位和十位数之间用and连连接接.755(seven hundred and fifty-five)1到到12逐个记，逐个记，13到到19结尾结尾teen，整整十十都是都是ty结尾，结尾，要想表达要想表达几十几几十几，整十整十连字连字个位数。个位数。英语中没有“万”这个单位，要用thousand来表达：ten thousand(一万）one hundred thousand（十万）3,333,333,333 billion million thousand百百(hundred)(hundred)、千千(thousand)(thousand)、百万百万(million)(million)十亿十亿（billion)billion)等词等词前与数字或前与数字或a(na(n)连用时，连用时，词尾不可加词尾不可加“s s”,”,也不用也不用“ofof”。百百(hundred)(hundred)，千千(thousand)(thousand)，百万百万(million)(million)十亿（十亿（billion)billion)等词等词与介词与介词ofof连用时，连用时，须用须用复数复数形式，形式，表示不确定数目。表示不确定数目。基变序，有规律基变序，有规律，一、二、三特殊记一、二、三特殊记，first，second和和third，从四开始加从四开始加th，八去八去t，九去，九去e，五五和和十二十二ve要用要用f替替，整十变整十变y为为ie，后后加加th别忘记别忘记，若想表示几十几若想表示几十几，只变个位就可以只变个位就可以。1.序数词的缩写形式由阿拉伯数字 加序数词后面的两个字母构成。first=1st second=2nd third=3rd four=4th fifth=5th2.序数词前一般要加定冠词the 或代词，修饰名词。the first day,my thirteenth birthday3.序数词前加aan,表示“再一，又一”。The story is so interesting that Ill read it a second time.表示事物的编号表示事物的编号:基数词放到名词的后边基数词放到名词的后边,该名词一般要大写该名词一般要大写L Lesson esson O One=ne=L Lesson 1esson 1序数词放到名词的前面，序数词放到名词的前面，加定冠词。加定冠词。Lesson Lesson OneOne =the firstthe first lesson lesson房间号、公共汽车号、电话号码、页码均用基数词。如：Room 386 No.14 bus Tel.No.5328513 Page 101英语中表示”几个半“的两种表达方法：1.数词+and a half+名词复数2.数词+名词复数+and a halftwo and a half hours 两个半小时two hours and a halfone hour and a half 一个半小时时刻表达法：时刻表达法：顺序法顺序法:先说小时先说小时,后说分钟后说分钟 8:15 eight fifteen8:15 eight fifteen倒序法倒序法:先说分钟，后说小时先说分钟，后说小时3030分钟内分钟内:分钟分钟+pastpast+小时小时 9:21 twenty-one past nine9:21 twenty-one past nine3030分钟整分钟整:half past+小时小时 10:30 half past ten10:30 half past ten3030分钟外分钟外:差几分差几分+toto+将要到达的点钟将要到达的点钟 11:45 fifteena quarter to twelve11:45 fifteena quarter to twelve整点用oclock5:00five oclock 分数和小数的表达法：1.分子用基数词，分母用序数词，分子大于1，分母用复数 1/4one fourth 或 a quarter 4/5four fifths 1/2one half,不读作 one second2.小数点读point 0.3zero point three 2.53two point five three3.百分比的读法：先读基数词，再读 百分号%(percent)5%five percent分数、百分数的谓语动词是单数还是复数的判断：其实分数、百分数作主语时用单数动词还是复数动词不是看分数本身，而是看of后的名词。如果该名词是复数即用复数动词，如果是单数或不可数名词则用单数动词。Two thirds of an apple is water.Two thirds of the apples are bad.日期的表达法：“月+日的序数词”表示，有两种读法：7月20日 July the twentieth the twentieth of July1999年8月23日August the twenty-third,nineteen ninety-ninethe twenty-third of August,nineteen ninety-nine年份、年代表示法：年份要用基数词，每两位一读 1999=nineteen ninety-nine1990s(20世纪90年代）=nineteen nineties尤其要注意“在某人岁时”的表达法：in ones+表示整十的基数词复数 在他203070岁时 in his twenties thirties seventies“基数词+连字符+名词+连字符+形容词”构成的形容词中，名词用单数，作定语He is only a seven-year-old boy.()1._ people will visit Qinzhou during the 12th Games of Guangxi.A.Thousand B.Two thousands C.Thousands of D.Thousand of()2.Kangkang is a school boy.He got a good gift on his _ birthday.A.fourteenth B.fortieth C.the fortieth()3._ of the land is covered with trees and grass in Pingjiang,Yueyang.A.Three fives B.Three fifths D.Three fifth()4.I like neither of the two books.Please show me _ one.A.third B.a third C.the third D.three ()5.Eight _ students in our school are from countryside.A.hundreds B.hundred C.hundreds of D.hundred of()6._ of the warm water _ already been used up.A.Two third,has B.Two third,have C.Two thirds,has D.Two thirds,have CABBBC解题技巧：1.理解题意2.基数变序数特殊记3.序数词前常加the或代词4.答案排除法巩固提高：()1.last year,I visited a chemical in Nanning,there are about workers in it.A.six thousands B.six thousand C.six thousands of D.six thousand of()2.Tom has just finished writing a article.A.nine-hundred-words B.nine-hundreds-word C.nine-hundred-word D.nine-hundreds-words()3.How much is the pair of shoes?-Twenty dollars enough.A.is B.are C.am D.was()4.My uncle bought me an iPhone for my birthday.A.twelve B.twelfth C.the twelve D.the twelfth()5.All the visitors live on floor.A.two B.second C.the second D.twice BCABC()6.Can you imagine what life will be like in time?A.50 years B.50 years C.50-years D.50-years()7.About of the students in our class were born in the .A.two thirds,1990s B.two thirds,1990 C.two third,1990s D.second three,1990()8.Ive looked for it twice,but I havent found it.-Why not try?A.three times B.once C.third time D.a third time()9.David,how old is your father this year?-.And we just had a special party for his birthday last weekend.A.Fortieth,forty B.Forty,forty C.Forty,fortieth D.Fortieth,fortieth()10.fishes were killed by the polluted water last year.A.Millions B.Four millions C.Millions of D.Four millions of AADCC