1、英语专题数词目 录三、序数词用法一、基本构成四、课后练习二、基数词用法基 本 构 成【壹】小测试13543840.359005501014%小测试13thirteeneight ninths54fifty-foursix and two fifths384three hundred and eighty-four0.35zero point three five93055610ninety-three million fifty-five thousand six hundred and ten14%fourteen percent一、基数词的构成1、112为独立的单词1one7seven2t
2、wo8eight3the9nine4four10ten5five11eleven6six12twelve2、1319加teen，13、15、18较特殊13thirteen17seventeen14fourteen18eighteen15fifteen19nineteen16sixteen3、2090加ty，20、30、40、80较特别20twenty60sixty30thirty70seventy40forty80eighty50fifty90ninety4、其他非整十两位数由整十数+“-”+个位数21twenty-one61sixty-one31thirty-one 71seventy-on
3、e5、100999的基数词，按“百位+and+十位个位”100a/one hundred101one hundred and one213two hundred and thirteen957nine hundred and fifty-seven5 5、千位以上，先将数字从右向、千位以上，先将数字从右向左数起，每三位加一个逗号。左数起，每三位加一个逗号。从右向左数，第一、二、三个从右向左数，第一、二、三个逗号前分别用逗号前分别用thousandthousand、millionmillion、billionbillion（千、百万、十亿）然后（千、百万、十亿）然后从左向右三位三位地读。两个从左
4、向右三位三位地读。两个逗号间最大的数为百位的形式逗号间最大的数为百位的形式303,580,009,102 three hundred and three billion five hundred and eighty million nine thousand one hundred and two 609,008,056,045 six hundred and nine billion eight million fifty-six thousand forty-five二、序数词的构成正常情况下，由基数词+th构成。4forth6sixth7seventh5、8、9、12为特殊5fifth
5、8eighth9ninth12twelfth“几十几”为“基加序”1first20twentieth2second100hundredth3third30thirtieth4fourth1000thousandth21twenty-first599five hundred and ninety-ninth1、2、3为特殊11st22nd33rd44th阿拉伯数字阿拉伯数字+序数词最后两个字母序数词最后两个字母序数词缩写序数词缩写三、分数和百分数分子用基数词，分母用序数词，分子用基数词，分母用序数词，分子是分子是1，分母用单数，分子大于，分母用单数，分子大于1，分母用复数，分母用复数五分之一五分
6、之一one fifth1、分数五分之二五分之二two fifths三分之二三分之二three fifths二分之一二分之一a/one half(不用不用second）四分之一四分之一one fourth/a quarter特殊分数分数大于1，用“整数+and+分数”表示two and one third2%two percent49%forty-nine percent基数词+“percent（不用复数）”2、百分数、百分数3.14three point one four0.4zero point four基数词 point 基数词3、小数0读作zero或O（/u/)e基数词用法【贰】表示数量
7、的多少表示数量的多少表示次（倍）数表示次（倍）数表示年龄表示年龄表示编号表示编号表示年龄表示年龄1、直接用：He is eight (eight years old)2、复合形容词：five-year-old3、几十几岁：in ones 几十的复数：She died in her nineties表示数量的多少表示数量的多少1、1（a/an/one）+n单，1以上+n复2、hundreds/thousands/millions/billions+of=数以计的an apple is an doctorthree women are arguing therehundreds of people
8、 died in“911”表示次（倍）数表示次（倍）数一次（倍）用once，两次（倍）用twice，两次（倍）以上用“基数词+times”表示倍数1）times asas“是的几倍”；Asia is four times as large as Europe.亚洲的大小是欧洲的4倍。2）times+形容词形容词/副词比较级副词比较级+that:The new building is four times higher than the old one.新楼比旧楼高4倍。3）times+the size/height/length/depth+ofThe earth is 49 times th
9、e size of the moon.地球是月亮大小的49倍。The ball is twice the width of our classroom.舞厅是我们教室宽度的2倍。表示编号表示编号Room 403 403号房注：“N+大写基数”=小写序数+n02040301表示整点基数词+oclock(oclock 可省略)9:00 nine oclock在130分之间分+past+小时9：03 three past nine在3059之间（60-分）to（时+1）1:58 two to two2:59 one to three一刻钟为quarter，半小时为half6:30 half past
10、 six7:45 a quarter to eight表示时间05在日常生活中可以直接时加分6:30 six thirty9:45 ninie forty-five表示整点基数词+oclock(oclock 可省略)9:00 nine oclock在130分之间分+past+小时9：03 three past nine在3059之间（60-分）to（时+1）1:58 two to two2:59 one to three在日常生活中可以直接“时加分”6:30 six thirty9:45 ninie forty-five一刻钟为quarter，半小时为half6:30 half past si
11、x7:45 a quarter to eight表示日期年份、年代用基数词，一般写作阿拉伯数字。1949读作 nineteen forty-nine2005读作two hundred and five（1）0102030420世纪60年代 1960s读作 nineteen sixties年代年代顺序英：日月年美：月日年（2）日期用序数词表示年、月+in日+on（3）年份、年代用基数词，一般写作阿拉伯数字。1949读作 nineteen forty-nine2005读作two hundred and five顺序英：日月年美：月日年年代20世纪60年代：1960s读作 nineteen sixt
12、ies日期用序数词表示年、月+in日+on2007 06 18写作 June 18th，2007读作June the eighteenth，two hundred and seven小拓展小拓展等号表示为等号表示为ismakeequal(一般用单数一般用单数)小拓展小拓展加法运算的表示加法运算的表示常用常用and(连词连词),plus（介词）（介词）,add（v）等表示。等表示。如：Seven and(plus)eight is makes fifteen.7加8等于15。If you add ten to eight,you get eighteen.10加8等于18。小拓展小拓展减法运算的
13、表示减法运算的表示通常用通常用 minus,from,take away(from)等表示。等表示。如：Twelve minus two is leaves,equals ten.12减2等于10。5 from 20 leaves 15.20减5余15。If you take five from twelve,youre left with seven.12减去5得7。If you take four away from ten,that leaves six.10减去4得6。小拓展小拓展乘法运算的表示乘法运算的表示通常用通常用 times,multiply,multiplied by,等表示
14、。等表示。如：2 and 3 multiply to make 6.2和3相乘得6。2 multiplied by 4 makes 8.2乘以4得8。Five times three is equals fifteen.5乘以3等于15。小拓展小拓展除法运算的表示除法运算的表示通常用通常用 divide,divided by,into 等表示。等表示。如：Four into twelve is makes three.12除以4等于3。30 divided by 6 is equals5.30除以6等于5。5 divides into 30 is 6.用5除30等于6。小拓展小拓展大于大于 i
15、s greater than小于小于 is less than大于等于大于等于 is no less thanis more than or equal to小于等于小于等于 is no more thanis less than or equal to不等于不等于 is not equal to序数词用法【叁】the second class 2班the thrid day 第三天事物的顺序事物的顺序表示日期表示日期5月1日 May the first1、表示顺序和日期我们已经试了三次，但还会再试一次Weve tried for three times,but well try it a f
16、ourth time序数词前加aan,表示“再一，又一”序数词用在最高级前，表示“第几最”The Yellow River is the second longest river in China序数词可做定语、宾语、表语Our first plan is better than the second.定语He chose the second.宾语She is the third in our class.表语课 后 练 习【肆】3.1477%three sevensnine and three fifths three point one fourSeventy-seven percent
17、1、I was born on()A、May 12th,2007B、12th 2007 MayC、May 2007 12thD、2007,May 12th2、The old man is still work hard though he is_(七十几岁）in his seventies3、This room is ()ours A、three times big as B、as three times big as C、three times as big as D、as big three times as4、There are()of students,but only()of them are girls A、hundreds;two hundred B、hundreds;two hundreds C、hundred;two hundred D、hundreds;two hundreds5、-Is Dongjin High-speed Railway the()in this province？-Yes,its just a little smaller than the largest in Wuhan.A、largest B、second largest C、most large
