中考英语知识点总复习之数词.pptx

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1、1 1、基数词的构成、基数词的构成（1）1-12的基数词是独立的单词，有其各自的形式。one two three four five six seven eight nine ten eleven twelve第1页/共55页（2）13-19的基数词以-teen结尾。thirteen fourteen fifteen sixteen seventeen eighteen nineteen 第2页/共55页（3）20-90 的整十位数基数词以-ty结尾。twenty thirty forty fifty sixty seventy eighty ninety第3页/共55页（4）21-90 的非

2、整十位数的表示法，是在十位数 和个位数之间用连字符“-”。twenty-one 21 thirty-three 33 e.g.53 64 75 99 第4页/共55页（5）百、千、百万、十万的表示方法。N00 hundred N,000 thousand N,000,000 million N,000,000,000 billione.g.100 one hundred 2,000 two thousand 3,000,000 three million 4,000,000,000 four billion第5页/共55页（6 6）101-999101-999的基数词的表示法，是在百位数和十位

3、数之间，的基数词的表示法，是在百位数和十位数之间，或在百位数和个位数之间加或在百位数和个位数之间加”and”.”and”.e.g.one hundred and two 102 two hundred and sixteen 216 four hundred and four 404 513 222 363 999第6页/共55页（7）1000以上的数目表示方法。e.g.2,004 two thousand and four34,228 thirty-four thousand,two hundred and twenty-eight725,369 seven hundred and twen

4、ty-five thousand,three hundred and sixty-nine 17,657,400 1,214,000,000第7页/共55页巧学妙记一至十二词各异，一个一个单独记，前轻后重（teen）是十几，前重后轻（ty）是几十fourteen,forty分清楚，thirteen,thirty看仔细，eighteen(eighty)只有一个t,几十几和几百几连字符、and莫丢弃第8页/共55页Exercise1、-Excuse me,how does this number 20,135 read?-It read .A.twenty thousands one hundre

5、d and thirty-fiveB.twenty thousand one hundred and thirty fiveC.twenty thousand one hundred and thirty-fiveD.twenty thousands,one hundred and thirty-five第9页/共55页Exercise2、-Bob,can you write the number seven hundred and eighty thousand and thirty-two?-Yes,it is _.A.78,032 B.7,832 C.7,032 D.780,032第10

6、页/共55页 2.2.基数词的运用基数词的运用（1 1）表示具体数目时，）表示具体数目时，hundredhundred，thousandthousand，millionmillion等等 用单数用单数;e.g.five hundred eight hundred(2)(2)表示不确切数目时可以用复数形式，与表示不确切数目时可以用复数形式，与of of连用表示连用表示 “数以数以.计的计的”；hundreds of 成百上千 thousands of 成千上万e.g.Thousands of trees must be planted every year.第11页/共55页(3)基数词的复数形

7、式可用来表示人的岁数和年代。年代：in the+年代+s(或s)表示“在世纪年代”in ones+整10数的复数形式 表示一个不确定的年龄e.g.He went to the United States in his twenties.That was in the early forties第12页/共55页(4)(4)由基数词和名词合成的形容词作定语时，由基数词和名词合成的形容词作定语时，其中的名词只用单数。其中的名词只用单数。e.g.She wrote a two-thousand-word composition last night.Claude is an eleven-year-

8、old boy.I m a eighteen-year-old girl.第13页/共55页Exercise1、How many people will come to Beijing next year?(2009芜湖)Its hard to say,_ people,I think.A.million of B.millions of C.three millions D.three millions of第14页/共55页Exercise2、In the past twenty years,many tall buildings have been built in our city.l

9、ook!This is a _.(09年天津中考)A.70-floor building B.70-floors building C.70-floor buildings D.70 floors building第15页/共55页2.2.2.2.序数词的构成序数词的构成序数词的构成序数词的构成基数词基数词oneonetwotwothreethreefi five veeighteightninenineTwelveTwelve序数词序数词firstfirstsecondsecondthirdthirdfiffifth theighteighth hninninth thtwelftwelft

10、h th（1）第一第十九的构成。第16页/共55页除第一，第二，第三，第五，第八，第九，第十二为特殊除第一，第二，第三，第五，第八，第九，第十二为特殊形式，其他的序数词均由其对应的基数词加后缀形式，其他的序数词均由其对应的基数词加后缀-th-th构成。构成。four fourth six sixth seven seventh eleven eleventh thirteen thirteenth fourteen fourteenth fifteen fifteenth sixteen sixteenth seventeen seventeenth eighteen eighteenth n

11、ineteen nineteenth第17页/共55页（2 2）整十的数字序数词的构成方法：将对应的基）整十的数字序数词的构成方法：将对应的基 数词结尾数词结尾y y变变i i，再加，再加-eth.-eth.e.g.twent e.g.twenty y twenti twentietheth thirt thirty y thirti thirtietheth fort forty y forti fortietheth fift fifty y fiftififtietheth sixt sixty y sixtisixtietheth sevent seventy y seventisev

12、entietheth eight eighty y eightieightietheth ninet ninety y ninetininetietheth第18页/共55页（3）表示“几十几”时，十位数的基数词不变，只把个位数变成序数词即可。e.g.36 thirty-six 第36 thirty-sixth 98 ninety-eight 第98 ninety-eighth 第 55 fifty-fifth 第 74 seventy-fourth 第 88 eighty-eighth 第1-99 第19页/共55页（4 4）百，千，百万等的序数词在词尾加）百，千，百万等的序数词在词尾加-t

13、h-th。e.g.第一百 hundredth 第一千 thousandth 第一百万 millionth 第十亿 billionth 若是多位数，则前边的数用基数词，末尾数用序数词。e.g.第101 one hundred and first 第199 one hundred and ninety-ninth 第20页/共55页（5 5）序数词的缩写形式是由阿拉伯数字加上序数）序数词的缩写形式是由阿拉伯数字加上序数词的最后两个字母构成的。词的最后两个字母构成的。e.g.fire.g.first st-1st seco-1st second nd-2nd thi-2nd third rd 3rd

14、3rd fourth-4 fourth-4th th twelfth-12t twelfth-12th h twenty-fir twenty-first st 21 st 21 st forty-fift forty-fifth h 45 th 45 th one hundred and fifty-thi one hundred and fifty-third rd 153 rd 153 rd第21页/共55页Exercise1、-How old is your son?-.We had a special party for his birthday last Sunday.A.Nine

15、;ninth B.Nine;nineC.Ninth;nine D.Ninth;ninth 第22页/共55页2、I think that the century(世纪)will bring us more hopes.A.twenty-one B.twentieth-firstC.twenty-first D.twentieth-one 第23页/共55页2.2.序数词的用法序数词的用法(1 1）在使用序数词时，通常前面要加定冠词）在使用序数词时，通常前面要加定冠词the.the.e.g.The second lesson is more difficult than the first.第2

16、4页/共55页(2)(2)序数词前面出现不定冠词序数词前面出现不定冠词a/ana/an时，表示时，表示“再一，再一，又一又一”。e.g.e.g.Weve tired it three times.Must we try it a fourth time？H His parents have is parents have two two children,but they want a children,but they want a thirdthird one.one.第25页/共55页(3)(3)序数词前有物主代词或其他修饰语时不用任何序数词前有物主代词或其他修饰语时不用任何冠词。冠词。

17、e.g.This is e.g.This is mymy first first job.job.Mrs.Blacks second child called Lucy.第26页/共55页(3)(3)基数词表顺序，置于名词之后；序数词表基数词表顺序，置于名词之后；序数词表顺序，置于名词之前，且与顺序，置于名词之前，且与thethe连用连用Part Two-the Second PartPart Two-the Second PartLesson Seven-the Seventh LessonLesson Seven-the Seventh Lessonpage 48-the forty-ei

18、ghth pagepage 48-the forty-eighth pageRoom 302,World War IIRoom 302,World War II第27页/共55页Exercise1、I got a good present on my birthday and I like it very much.A.fifteen B.fifteenth C.the fifteen D.the fifteenth第28页/共55页2、-I hear your pen friend is visiting Lianyungang again.Is it the time for him?-Y

19、es,and he will come for a third time next spring.A.first B.second C.third D.fourth第29页/共55页3、There are days in June and day is Childrens Day.A.thirty;the second B.thirty;first C.thirteen;the first D.thirty;the first第30页/共55页 4、There are _ people in my family.We live in the _ floor in a tall building

20、.A.five;six B.fifth;sixth C.fifth;six D.five;sixth第31页/共55页5.We are going to learn _next week.A.Lesson TwelveB.Lesson TwelfthC.Twelfth LessonD.the lesson Twelfth 第32页/共55页3、数词的运用 1.1.表示时间表示时间（1 1）先读钟点数）先读钟点数,后读分钟数。后读分钟数。e.g.10:10 ten tene.g.10:10 ten ten 4 4：25 25 four four twenty-fivtwenty-five e 6

21、 6：4343 six forty-three six forty-three 第33页/共55页(2)用介词past表示几点过几分（不超过半时）；用to表示差几分到几点。e.g.4:20 twenty e.g.4:20 twenty past past four four 8:42 eighteen 8:42 eighteen to to ninenine 60-42=1860-42=18 9:50 ten 9:50 ten to to ten ten 10:1010:10 ten ten pastpast ten ten 第34页/共55页(3)(3)整点直接用（整点直接用（+oclock

22、+oclock）表示。）表示。“半点钟半点钟”halfhalf，一刻钟用，一刻钟用a quartera quarter。e.g.6:00 six oclocke.g.6:00 six oclock 7:15 7:15 a quarter past sevena quarter past seven 8:30 half 8:30 half past past eighteight第35页/共55页Exercise 1.4:45 2.8:17 3.11:58 4.9:56第36页/共55页2.表示年、月、日 (1)(1)年份年份 1949 1949 nineteen forty-nine nine

23、teen forty-nine 20052005 twenty hundred and fivetwenty hundred and five two thousand and five two thousand and five 18001800 eighteen hundredeighteen hundred 第37页/共55页（2）日期 20082008年年4 4月月1010日日 April 10 April 10,20082008 April April 1010thth ,20082008 1010thth Apri April l 2008 2008 20102010年年9 9月月

24、1 1日日 September 1September 1,20102010 September 1 September 1st st,2010 2010 1 1st st September 2010 September 2010 英语中一般用英语中一般用月、日、年月、日、年或或日、月、年日、月、年来来表示。日期可表示。日期可以用基数（读以用基数（读做序数词）。做序数词）。第38页/共55页Exercise 1.1998 2.2015 3.1999年3月3日 4.2015年7月24日 第39页/共55页 3.表示分数 (1)分数的表达 分子1 分母复数 one half one third t

25、wo thirds one quarter three fourths/three quarters第40页/共55页 one one andand two thirds two thirds ten ten and and three fifths three fifths 第41页/共55页 meter meter four fifths meter four fifths meter metermeters s two and threetwo and three fourths fourths metersmeters 第42页/共55页 （2 2）分数的用法）分数的用法 “分数分数+

26、of+of+名词名词/代词代词”作主语时，作主语时，谓语动词的单复数取决于名词。谓语动词的单复数取决于名词。e.g.Two thirds of the students are boys in my class.One half of her money is spent on books.第43页/共55页Exercise 1.About _ of the workers in 1.About _ of the workers in the clothes factory are women.the clothes factory are women.A.third fifths A.thi

27、rd fifths B.third fifth B.third fifth C.three fifths C.three fifths D.three fifth D.three fifth 第44页/共55页2.We all know that _ of 2.We all know that _ of the earth _ covered by sea.the earth _ covered by sea.A.three fourth;is A.three fourth;is B.three fourths;is B.three fourths;is C.three fourths;are

28、 C.three fourths;are D.third four;is D.third four;is 第45页/共55页 4.倍数 表示表示三或三倍三或三倍以上的倍数用以上的倍数用“基数基数 词词+times+times”。e.g.This apple is twice as large as that one.This room is three times larger than that one.第46页/共55页 5.数词前加every，表示 “每一段时间或每隔一 段时间。e.g.e.g.every every ten ten days days 每十天每十天 every ever

29、y ninth ninth day day 每隔九天每隔九天 every every four four weeks weeks 每四个星期每四个星期 every every third third week week 每隔三个星期每隔三个星期第47页/共55页6.表示小数和百分数(1)(1)小数用基数词来表达，小数用基数词来表达，以小数点为界，左边的以小数点为界，左边的数字为一个单位，表示数字为一个单位，表示整数，数字合起来读；整数，数字合起来读；小数点右边的数字为一小数点右边的数字为一个单位，表示小数，数个单位，表示小数，数字分开读。字分开读。e.g.1.03 one point o th

30、ree zero 10.23 ten point two three 25.67 twenty-five point six seven第48页/共55页 (2)百分数 百分数用百分数用 “基数词基数词+percentpercent”表示表示。e.g.50%fifty percent 34.67%thirty-four pointSix seven percent 0.12%zero point onetwo percent第49页/共55页 7.排列顺序基数词和序数词都能表示排列顺序。基数词和序数词都能表示排列顺序。事物名词事物名词+基数词基数词 the+the+序数词序数词+事物名词事物名

31、词e.g.e.g.第一部分第一部分 Part one=the first partPart one=the first part 第一课第一课 Lesson one=the first lessonLesson one=the first lesson 第三组第三组 Group three=the third groupGroup three=the third group第50页/共55页1.0.49 point four nine 2.1.5 one point five3.8.67 eight point six seven4.30.6 thirty point six5.17.42%s

32、eventeen point four two percent6.9.57%nine point five seven percentExercise第51页/共55页 8.其他用法（1）基数词表示年龄 in ones+基数词复数e.g.five years old e.g.five years old in in onesones forties forties My elder sister is My elder sister is seventeenseventeen and my and my younger sister is younger sister is tenten.My

33、 uncle is My uncle is in his thirties.in his thirties.I m eighteen.I m eighteen.第52页/共55页(2)表示房间号和电话号码e.g.202 room two o two e.g.202 room two o two 404 room four o four 404 room four o four303-2244 303-2244 Three o three double two four fourThree o three double two four four第53页/共55页(3)(3)页码数，行数页码数，行数e.g.e.g.第第1010页：页：page tenpage ten 第第2525页：页：page twenty-five page twenty-five 第第109109页：页：page one hundred page one hundred and nine and nine 第第6 6行：行：line sixline six 第第2929行：行：line twenty-nine line twenty-nine 第54页/共55页感谢您的观看！第55页/共55页