英文基数词序数词的表达和用法.ppt

数词,Numerals,表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。,什么叫数词?,2,1 基数词（ cardinal number）,1 one two three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten,11 12 13 14 15 16 17 18 19,eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen,20 30 40 50 60 70 80 90 100,twenty thirty forty fifty sixty seventy eighty ninety one hundred,基数词的构成,1）112, 独立成词。 one two three four five six seven eight nine ten eleven twelve 2）13-19, 由39 + teen构成。 14fourteen 16-sixteen 17-seventeen 19nineteen 特殊拼写: 13 thirteen 15-fifteen 18eighteen 3）2090, 以-ty结尾。 20twenty 30-thirty 40forty 50fifty 60-sixty 70-seventy 80-eighty 90ninety 4）2199， 两位数，十位与个位之间有 “-”。 21 twenty-one 55 fifty-five 99 ninety-nine 5）101999，三位数，百位与十位/个位之间加and。 101 one hundred and one 840 eight hundred and forty 693 six hundred and ninety-three,5,29,7,hundred,and,基数词三位数 的构成,6,twenty-nine,729,hundred,and,seven,03,5,hundred,and,再来一个,7,three,503,hundred,and,five,基数词三位数 的构成,8,hundred,and,百位数,十/个位数,four hundred and thirty-two,one hundred and seventy,eight hundred and sixty-five,one hundred and nine,109,432,170,865,作业,339,126,203,451,704,178,926,854,703,151,309,326,703,651,307,428,注： 1、1000以上几个的词，每三位数加一个逗号，第一个逗号前的数为thousand，第二个逗号前的数为million（百万）, 第三个逗号前的数为billion（十亿），第四个逗号前的数为trillion（万亿） 888, 888，888，888，888 eight hundred and eighty-eight trillion, eight hundred and eighty-eight billion, eight hundred and eighty-eight million, eight hundred and eighty-eight thousand, eight hundred and eighty-eight,trillion trljn 万亿 billion bljn 十亿 million mljn 百万 thousand aznd 千hundred hndrd 百,29,431,500,7,6,thousand,hundred,million,billion,and,6) 1，000以上数目,从右向左每三位用“，” 分开,分别读为thousand , million, billion 千 百万 十亿,基数词的构成,12,基数词的构成,6 500 431 729 six billion,five hundred million,four hundred and thirty-one thousand, seven hundred and twenty-nine,four thousand, three hundred and twenty-one,seven million,six hundred and fifty four thousand, three hundred and twenty-one,7,654,321,1,987,654,321,4321,4,321,one billion, nine hundred and eighty-seven million,six hundred and fifty-four thousand, three hundred and twenty-one,1. hundred thousand (表示具体数字) million billion 2. hundreds thousands (表示概数) millions billions,三.基数词的用法,数词 (several)+,+ of,the/some / many/these/those hundreds of,基数词的用法,1、表示具体数目,hundred, thousand, million不用复数 表示不确定数目,用复数。即hundreds of(数百), thousands of(数千), millions of(数百万)+ 名词复数。 1) Our country has a population of 1,300 million people. 2) There are several thousand students in our school. 3) After the war, thousands of people became homeless.,作业,7046534210,178346790,1254321307,4283216547,6704653421,817034679,3120432130,9428320654,warming up 1. _ tress were planted on the mountain last year. A. Thousands of B. Thousand of C. Five thousand of D. Five thousands. 2_ of the students are girls in our class ATwo three BTwo threes CTwo thirds DSecond three 3.-When was he born? -He was born on _. A. second of October B. the October three C. October the second D. three of October,18,1. If a = 3, b=4, whats the answer to the problem, a+2ab+1=? the answer is_. A. twenty eight B. twenty-eighth C. twenty-eight 2. In our school about five _ students are able to surf the Internet . A. hunderd of B. hunderds of C. hundred,3. _ sheep were killed in the accident. A. Thousand of B. Thousand C. Thousands of 4. There are over nine _ workers in the factory, but _ of young people hope to work in it. A. hundred 0f; hundreds B. hundred; hundreds C. hundreds; hundred,5. people in the world are sending information by e-mail every day. A.Several million B.Many millions C.Several millions D.Many million,A,1 基数词（ cardinal number）,序数词的构成,1) 13, first, second, third 。 2) 419, 相应基数词+th, fourth,fifth,sixth,seventh,eighth,ninth,tenth,eleventh,twelfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth. 3) 2090, y变成ie +th, twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,eightieth,ninetieth。 4) 2199, 只把个位的基数词变成序数词 如twenty-first,ninety-ninth 5) 序数词缩写-数字最后两字母 如1st, 2nd, 3rd ,4th,基变序,有规律,词尾加上“th”， 一、二、三，特殊记，结尾字母t,d,d 八去“t”，九去“e”，“f”要用ve替 见“y”变成“i”和“e”，词尾加上“th”， 若是遇到几十几，只变个位就可以。 序数词缩写记清楚,数字后跟两字母。,(序数词构成规律),24,一.基数词、序数词,first,second,third,fourth,fifth,sixth,eighth,ninth,twelfth,twentieth,twenty-first,fortieth,one hundredth,one hundred and fifth,one hundred and twenty-ninth,nineteenth,练习,704653,11712,125,4280,16670465342,8170346791,4453216,94128654,作业,7046534210,178346790,1254321307,4283216547,6704653421,817034679,3120432130,9428320654,one oclock,ten past two,half past three,twenty to five,a quarter past five,a quarter to seven,seven fifty,表示在几点钟用介词 at,数词的表示法 时间,1. Its already 7:40 now. When will the film start? _. We still have five minutes. A. A quarter to seven B. A quarter to eight C. Seven past forty-five, 月日年 在1998年10月1日,数词的表示法 年月日,on Octorber the first, nineteen ninety-eight,on August the ninth,in May, two thousand and ten,天日用 on 年月用in,on Oct. 1st , 1998, 月日 在8月9日 月年 在2010年5月,1. The accident happened on_. A. April 5, 2001 B. 2001, April 5 C. April 2001, 5 2. I was born _. A. in March 8, 1993 B. on July 9, 1994 C. on May, 1995,20世纪90年代,in the 1990s/1990s,在他50多岁时,in his fifties,数词的表示法 1.年代世纪,in the,in ones + 整十基数词复数 在某人几十岁时,nineteen,nineties,2、“基数词+名词” 的合成形容词作定语， 中间有连字符“”,当中的名词用单数。 a 3 year old girl a seven-day holiday,3、表计量- “基数词+度量单位+形容词” The classroom is 7 meters long, 6 meters wide and 3 meters high.,33,1. There will be more chances in _ century than in _ century. A. twenty-one, twenty B. twenty-first, twentieth C. the twenty-first, the twentieth 2. The city changed a lot _. A. in 1980s B. in the 1980s C. in the 1980,3. He graduated in _ of _ century. A. the sixtieth; twenty B. sixty; the twentieth C. his sixties; the twentieth 4. She got the prize _. A. in her fifties B. in fifties C. in her fifty,5. The winner is _. He is an _ boy . A. eight-year-old; eight years old B. eight years old; eight-year-old C. eight-years old; eight-year-old 6.He came to China _. A. at the age of 20 B. when he is 20 C. at age of 20,7.The river is about _. A. 6,000 meters long B. 6,000-meters-long C. 6,000-meter-long,be + 数词 +度量词 + 形容词,1 5,分子 基数词 分母 序数词,one fifth,2 7,分子 1 分母 + s,two sevenths,1 4,分子 a 分母 quarter,a quarter,3 4,three quarters,1 2,a half,1 3,three and one third,3,基数词 + and + 分数,数词的表示法 分数百分数,80 %,基数词 + percent,eighty percent,百分数 + of + 可数名词复数 谓语动词用复数 百分数 + of + 不可数名词 谓语动词用单数,Seventy percent of students in our class are girls Over seventy percent of the earths surface is covered with water,1. _ of the students _ boys in Class A. Two three; are B. Two thirds; are C. Two thirds; is 2. _ of her money _ spent on clothes. A. Two three; are B. Two thirds; is C. Two third; is 3. _ the teachers in our school is about one hundred, and _ of them are women teachers. A. The number of; two thirds B. The number of ; two third C. A number of; two thirds,一个半小时 两个半小时,two and a half hours = two hours and a half,one and a half hours = one hour and a half,数词的表示法 半的表示法,1. The boy always stays there for _. A. three and half hour B. three hour and a half C. three and a half hours 2. The old man drank_ beer. A. two bottles and a half B. two and a half bottle C. two bottle and a half,一倍 once，两倍 twice， 三倍 three times (三倍或以上 基数词times),数词的表示法 倍数,This box is five times as big as that one. =This box is four times bigger than that one., A + be + 倍数 + as +adj.原+ as +B. A是B的 倍 A + be + 倍数 + adj.比+ than +B. A比B 倍,1. This building is _ that building. A. three time as tall as B. twice taller than C. three times as taller as 2. 我的箱子比你的重六倍! My box is _ yours. 2.What a table! Ive never seen such a thing before.It is it is long . A.half not as wide as B.wide not as half as C.not half as wide as D.as wide as not half,six times heavier than,seven times as heavy as,C,一般编码用 名词 + 基数词 207房 三年级一班 第五部分 第一课 3 号汽车 第一中学,Room 207 Class One Grade Three Part five = the fifth part Lesson one = the first lesson Bus No.3 = the No.3 bus No. 1 Middle School,数词的表示法 编号,1.My mother lives at on floor. A.Room Six;the second B.Six Room;second C.Room six;two D.the room six;the second,A,(1) 小数的读法 小数点左边的数通常按基数词读，若为三位以上的数，也可按编码式读法读出，即将数字单个读出；小数点右边的数通常按编码式读法单个读出。如： 6.86 six point eight six 14.15 fourteen point one five (2) 小数中“0”的读法 “0”在小数中通常读作nought（英）或zero（美），也可读作字母o。如： 0.08 （nought）point nought eight 或 （zero）point zero eight,小数表示法,6+511 Six plus five is eleven 或 Six and five is eleven. 11-65 Eleven minus six is five. 或 Six from eleven is five. 4520 Four multiplied by five is twenty. 或 Four times five is twenty. 2045 Twenty divided by four is five. 或 Four into twenty goes five. 3 Three squared is nine. 2 Two cubed is eight.,加减乘除式的表达方法,2,3,表示“大约、接近”，常用nearly, about, some, almost, around 等。 about 700 people some fifty years ago 表示“左右”用or so In the past five years or so “少于”用less than Less than 30 years old 不到30岁 “多于”用 more than , over More than a year ago over 70 years ago,约数表示法,(1)序数词作定语，前面要加the； The first truck is carrying a food basket John lives on the fifteenth floor She is my first English teacher. (2)有时加a/an，“再一”，“又一” 的意思 Well have to do it a second time Shall I ask him a third time？ When I sat down，a fourth man rose to speak They had a second child in 1988,序数词的用法,48,选择填空。 1March is _month of a year A a three B the third C a third 2We will have a meeting at 8:05_ Afive to eight B.eight to five Ceight o five 3Eight plus eight is_. Asixteen Bsixty-four Cone 4He is an _boy Aeight years Beight-year-old Ceight-years-old 5We will have a_ walk Aten minutes Bten minutes Cten-minutes,B the third,Ceight o five,Asixteen,Beight-year-old,Bten minutes,6The wall is_. Afour meters long Bfour meter long Cfour-m