初中英语数词复习.ppt

1、,Numeral (数词),1 2 3 4 5 6 7 8 9,one two three four five six seven eight nne,11 12 13 14 15 16 17 18 19,eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen,10 20 30 40 50 60 70 80 90,ten twenty thirty forty fifty sixty seventy eighty ninety,这里除 eleven， twelve， thirteen， fiftee

2、n， eighteen为特 殊形式外，其他都是由其个位数形式后添加后缀-teen构成。 整数几十中除twenty，thirty, forty，fifty，eighty为特殊形 式外，其他都是其个位数形式后添加后缀-ty构成。,两位基数词的构成:,21 22 23 24 25 26 27 28 29,twenty-one twenty-two twenty-three twenty-four twenty-five twenty-six twenty-seven twenty-eight twenty-nine,31 32 33 34 35 36 37 38 39,thirty-one thir

3、ty-two thirty-three thirty-four thirty-five thirty-six thirty-seven thirty-eight thirty-nine,表示几十几时，在几十和个位基 数词形式之间添加连字符“-”,三位基数词的构成:,389,three hundred and eighty-nine,457,four hundred and fifty-seven,890,eight hundred and ninety,608,six hundred and eight,百位数，个数基数词形式加 “hundred”，表示几百，在几十 几与百位间加上and 。,

4、千位数以上,从数字的右端向左端数起,每三位数加一个逗号“,”。从右开始，第一个“,”前的数字后添加thousand，第二个“,”前面的数字后添加 million,第三个“,”前的数字后添加 billion。然后一节一节分别表示，两个逗号之间最大的数为百位数形式。,多位基数词的构成:,five billion, two hundred and thirty-seven million, one hundred and sixty-six thousand, two hundred and thirty-four,5,237,166,234:,sixteen million two hundred

5、 and fifty thousand sixty-four,16,250,064:,two thousand six hundred and forty-eight,2,648:,基数词的用法,1.表示可数名词的数量,如： 575名学生 7，894棵树 673辆自行车,five hundred and seventy-five students,seven thousand eight hundred and ninety-four trees,six hundred and seventy-three bikes,基数词的用法,2 基数词的复数形式表示大量的不确定的数目，如: hundre

6、ds of + 可数名词复数:数以百计的,hundreds of birds, hundreds of animals,thousands of students thousands of workers,thousands of + 可数名词复数:数以千计的,There are about two _ students in the newly built school.,thousand B. thousands C. thousand of D. thousands of,A,基数词的用法,3.编了号的事物要用基数词表示顺序，但是基数词要后置。如： 第一课 第32页 第305房间 第12

7、路公共汽车,Lesson one,Page 32,Room 305,Bus No.12,时间表达法,顺读法 5：00 6：18 12：15 4：30 6：45 5：50,倒读法,five oclock,six eighteen,twelve fifteen,eighteen past six,a quarter past twelve,four thirty,half past four,five fifty,ten to six,six forty-five,a quarter to seven,I was born in January.,January,一月,二月,February,三月

8、,March,五月,四月,April,May,八月,七月,July,August,六月,June,九月,September,December,十月,October,十一月,November,十二月,Month(月份),返回,I was born on January 15th.,(序数词:是指表示顺序的数词, 相当于文中的“第几” ),First (1st) Second (2nd) Third (3rd) Fourth (4th) Fifth (5th) Sixth (6th) Seventh (7th) Eighth (8th) Ninth (9th),Eleventh (11th) Tw

9、elfth (12th) Thirteenth (13th) Fourteenth (14th) Fifteenth (15th) Sixteenth (16th) Seventeenth (17th) Eighteenth (18th) Nineteenth (19th),Tenth (10th) Twentieth (20th) Thirtieth (30th) Fortieth (40th) Fiftieth (50th) Sixtieth (60th) Seventieth (70th) Eightieth (80th) Ninetieth (90th),其中蓝色的为特殊形式，其它的序

10、数词都是由其相对应 的基数词后面添加“th”构成 。整数第几十的形式由其对 应的基数词改变结尾字母y为i，再加“eth”构成。,两位序数词的构成,第33名 第46个 第89棵 第66位,the thirty-third,the forty-sixth,the eighty-ninth,the sixty-sixth,序数词的构成 :, 一般来说，是由相应的基数词加词尾th构成。例：, four th fourth six th sixth seven th seventh ten th tenth, 下面这些基数词在变为序数词时，有特殊的变化。例：, one first two second

11、three third five fifth eight eighth twelve twelfth, 十位整数序数词的构成方法是将基数词的词y变成i，然后再加eth。例：, twenty twentieth thirty thirtieth forty fortieth ninety ninetieth, 两位或两位以上的基数词变成序数词时，仅将个位数变成序数词。例：, twentyone twentyfirst thirtyfive thirtyfifth a hundred and fiftythree a hundred and fiftythird,基数词变为序数词的规则(口诀)：,

12、基变序，有规律，词尾加上th；一、二、三特殊记，结尾t、d、d。 八减t，九减e，f要把ve替。ty把y改为i，记得th前有个e。,注意： a不在上述口诀中的基数词变序数词时， 只需在词尾加th。 b20以上的基数词变序数词时只需将个位数改为 序数词。例如：twenty-five-twenty-fifth c所给数量词是one、two时，很有可能是填序数词， 但也有可能是填次数：once、twice， 根据句子的具体意思来确定。,序数词的用法,用来表示事物的顺序，如：,Winter is the fourth season in a year.,冬天是一年中的第四个季节。,The _ ques

13、tion is much more difficult than this one. A. sixth B. six C. sixteen D. sixty,中考链接,A,June is the _ month of a year. A. six B. sixth C. seven D. seventh,B,日期要用序数词来表达,并且介词用on,在6月 1日,on June 1st,on July 15th,on August 30th,On October 25th,在7月15日,在8月30日,在10月25日,A. two thirds, is B. second three, are C.

14、 two thirds, are D. two third, are,中考链接,I think of the materials I listened to at the beginning of the exam easy.,C,分数表达法：先写基数词表示分子，后写序数词表示分母，如果分子大于1时，分母要加 “s”。,口诀:分子基数词，分母序数词，分子超过一，分母加s。,This is a big class, and _of the students are girls. A. two third B. second three C. two thirds D. two three,C,一

15、、用所给单词的适当形式填空：1.We have already entered the (twenty-one) century.2.There are (seventh) days in a week.3.December is the (twelve) month of a year.4.His (one) time to visit Beijing was in 1999,5.He s been to Da li (two).,twenty-first,seven,twelfth,first,twice,表次数,二、选择填空：1.He lives in .A.310 room B. room 310 C. Room 310 D.310 Room2.This is Jims time to see the film.A. the second B. two C. second D. twice3.The _ day of a week is Thursday.A. five B. fivth C. The fifth D. fifth4.What s the time? Its .(6:20)A. six past twenty B. twenty past sixC. twenty to