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1、Numbers数词数词一一. .基数词、序数词基数词、序数词二二. .数词的表示法数词的表示法1. 基数词：表示数目的词称为基数词。基数词：表示数目的词称为基数词。 one eleven twenty twotwelve thirty three thirteen forty four fourteen fifty five fifteen sixty six sixteen seventy seven seventeen eighty eight eighteen ninety nine nineteen tenD百位数百位数 个数基数词形式加“hundred”，表示几百，在几十几与百位间加
2、上and 101 one hundred and one 320 three hundred and twenty 648 six hundred and forty-eightE千位数以上千位数以上 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。four thousand three hundred and twenty-one7,654,3211,987,654,3214,321one
3、billion nine hundred and eighty-seven million,six hundred and fifty-four thousand three hundred and twenty-oneseven million, six hundred and fifty four thousand three hundred and twenty-one热门考点：in ones + 整十的复数形式 (在某人几时岁时) My parents are in their forties. Mr. Green is in her fifties.表示数量的名词的使用：表示数量的名
4、词的使用： Several hundred students five thousand people 1. hundred thousand (表示具体数字表示具体数字) million billion2. hundreds thousands (表示概数表示概数) millions billions三三. .基数词的用法基数词的用法数词数词( (several )+)+ ofmany hundreds of 月日年月日年 在在2008年年10月月1日日四四. .数词的表示法数词的表示法 年月日年月日on October the first, two thousand and eight日日
5、the + 序数词序数词月月（首字母大写）（首字母大写）月日与年之间月日与年之间用用 ，分开分开年年（两位两位读）（两位两位读）on August the ninthon Oct. 1st , 2008 月日月日 在在8月月9日日 月年月年 在在2010年年5月月有日用有日用 on 无日用无日用inin May, two thousand and ten1. The accident happened on_. A. April 5, 2001 B. 2001, April 5 C. April 2001, 52. I was born _. A. in March 8, 1993 B. on
6、 July 9, 1994 C. on May, 199520世纪90年代in the 1990s在他50多岁时 in his fifties四四. .数词的表示法数词的表示法 年代世纪年代世纪in thein ones + 整十基数词复数在某人几十岁时nineteen nineties1. The city changed a lot _. A. in 1980s B. in the 1980s C. in the 19802. He got the prize _. A. in his fifties B. in fifties C. in his fifty序数词序数词 first 1s
7、t twentieth 20th second 2nd twenty-first 21st third 3rd thirtieth 30th fourth 4th fortieth 40th fifth 5th fiftieth 50th sixth 6th sixtieth 60th seventh 7th seventieth 70th eighth 8th eightieth 80th ninth 9th ninetieth 90th1. 序数词一般由基数词后加序数词一般由基数词后加th构成，前面一般加构成，前面一般加定冠词定冠词the。 the eighteenth, the two
8、hundredth2. 以以y结尾的基数词构成序数词时，先把结尾的基数词构成序数词时，先把y改成改成i，再加再加eth。 The fiftieth, the twentieth3. 不规则的序数词有以下几个不规则的序数词有以下几个first, second, third, fifth, eighth, ninth, twelfth4. 编号有两种表示法编号有两种表示法1）名词基数词）名词基数词 Lesson Three, Part One2）定冠词序数词名词）定冠词序数词名词 the third lesson, the first part5. 序数词前加序数词前加a/ an, 表示表示“再再
9、”，“又又” You should have a try a second time. 你应该再试一次。你应该再试一次。 I have seen the film two times, but I want to see it a third time because it is interesting. 我已经看过这部电影两次了，但是我还想再看我已经看过这部电影两次了，但是我还想再看一次（第三次）因为太有趣了。一次（第三次）因为太有趣了。一个半小时一个半小时两个半小时两个半小时 two two andand a half hour a half hours s= two hour= two
10、hours s andand a half a half one one andand a half hour a half hours s= one hour = one hour andand a half a half四四. .数词的表示法数词的表示法 半的表示法半的表示法1. The boy always stays there for _. A. one and half hour B. one and a half hour C. one and a half hours2. The old man drank_ beer. A. two bottles and a half B.
11、 two and a half bottle C. two bottle and a half 分数，小数分数，小数百分数百分数1 15 5分子分子 基数词基数词分母分母 序数词序数词one fifthone fifth2 27 7分子分子 1 1分母分母 + s+ stwo seventhtwo sevenths s1 14 4分子分子 a a分母分母 quarterquartera quartera quarter3 34 4three quarterthree quarters s1 12 2a halfa half四四. .数词的表示法数词的表示法 分数百分数分数百分数时间和钟点时间和
12、钟点时间类型时间类型表示法表示法例例读法读法整点整点基数词（基数词（+ oclock) 1:0030分钟分钟分钟分钟 + past +小时小时 2:10= 30 分钟分钟half + past + 小时小时3:3030分钟分钟（60-分钟）分钟） + to +（小时（小时 + 1）4:40分钟逢分钟逢15即即 一刻钟一刻钟a quarter5:156:45简化法简化法按顺序读基数词按顺序读基数词7:50one oclockten past twohalf past threetwenty to fivea quarter past fivea quarter to sevenseven fif
13、ty表示在几点钟用介词表示在几点钟用介词 atat四四. .数词的表示法数词的表示法 时间时间一倍一倍 once，两倍，两倍 twice，三倍三倍 three times (三倍或以上：基数词三倍或以上：基数词times)四四. .数词的表示法数词的表示法 倍数倍数 This box is five times as big as that one.=This box is four times bigger than that one. A + be + 倍数倍数 + as +adj.原原+ as +B. A是是B的的 倍倍 C + be + 倍数倍数 + adj.比比+ than +D.
14、C比比D 大大 倍倍six times heavier thanseven times as heavy as1. This building is _ that building. A. three time as tall as B. twice taller than C. three times as taller as2. 我的箱子比你的重六倍我的箱子比你的重六倍! My box is _ yours. 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 He came to China _. A. at the age of 20 B. when he is 20 C. at age of 20四四. .数词的表示法数词的表示法 年龄年龄四四. .数词的表示法数词的表示法 计量计量2 meters wide3 meters highThe river is about _. A. 6,000 meters long B. 6,000-meters-long C. 6,000-meter-longThanks