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1、数词,数词,考点直击,数词分基数词和序数词。基数词表示数目。序数词表示顺序。,考点直击,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,一.基数词的用法,基数词在句中主要用作主语、宾语、定语、表语、同位语，例如：Thirty of them are Party members.（主语）-How
2、 many would you like？-Three，please（作宾语）They live on the third floor.（定语）Six plus four is ten.（表语）We four will go with you.（同位语）,（2）在表示一个具体数字后时，hundred,thousand,million不用复数Our country has a population of 1,300 million people.There are three thousand students in our school.（3）在表示一个不确定数字时则用复数+of+pl.。Af
3、ter the war,thousands of people became homeless.Maize is the most important food crop for millions of people in the world.They arrived in twos and threes,(4)数词复数的用法：a.在表示一排或者一组的情况下：They arrived in twos and threes(三三两两）.b.表示几十岁：the forties-41-49c.表示年代：in the 1920s例如：He is in his early thirties He die
4、d still in his forties This took place in 1930s,one oclock,ten past two,half past three,twenty to five,a quarter past five,a quarter to seven,seven fifty,基数词表示在几点钟用介词 at,5）序数词也可以用作副词“首先”，When did you first see him?Which horse came in first?7.倍数的表示法（once,twice,three times)a.倍数（或分数）+as+adj.+as Ihaveth
5、reetimesasmanyasyou.我有你三倍那么多。b.倍数（分数）+thesize(amount，length)of Theearthis49timesthesizeofthemoon.c.倍数（分数）+形容词（副词）比较级+than Thegrainoutputis8percenthigherthisyearthanthatoflastyear.d.还可以用by+倍数，表示增加多少倍 Theproductionofgrainhasbeenincreasedby fourtimesthisyear.,80%,基数词+percent：,eighty percent,half/(百)分数+
6、of+可数名词复数 谓语动词用复数half/(百)分数+of+不可数名词谓语动词用单数,3.78,three point seven eight,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.one and half hour B.one and a half hour C.one and a half hours2.The old man drank_
7、beer.A.two bottles and a half B.two and a half bottle C.two bottle and a half,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 threepart five=the fifth partlesson one=the first lesson Bus No.3=the No.3 busNo.1 Middle School,数词的表示法 编号,The river is about _.A.6,000 meters long B.6,000-me
8、ters-long C.6,000-meter-long a 6000-meter-long river,四.数词的表示法 计量,be+数词+量词+形容词冠词+数词-单数名词-形容词,序数词的用法,（1）序数词主要用作定语，前面要加定冠词，例如：The first truck is carrying a foot basketsJohn lives on the fifteenth floor,（2）序数词有时前面可加不定冠词来表示“再一”，“又一”这样的意思 Well have to do it a second time Shall I ask him a third time？When
9、I sat down，a fourth man rose to speak,（3）几个序数词特别拼写：one-first,two-second,three-third,five-fifth,eight-eighth,nine-ninth,twelve-twelfth。（4）表示年，月，日时，年用基数词表示，日用序数词表示。1949年十月一日读作:October(the)first,nineteen sixty2004年九月十日读作：September(the)tenth,two thousand and four,月日年 在2008年10月1日,数词的表示法 年月日,on Octorber t
10、he first,two thousand and eight,on August the ninth,in May,two thousand and ten,有日用 on 无日用in,on Oct.1st,2008,月日 在8月9日 月年 在2010年5月,15,分子 基数词分母 序数词,one fifth,27,分子 1分母+s,two sevenths,14,分子 a分母 quarter,a quarter,34,three quarters,12,a half,13,three and one third,3,基数词+and+分数,数词的表示法 分数百分数,（5）表示分数时，分子用基数
11、词表示，分母用序数词表示。分子大于1时，分母加-s。例如：three fourths,one second,two fifths,（6）序数词有时用缩写形式：first1st second2nd third3rd fourth4th twenty-second22nd,真题训练,1.About _ students in our class can describe that place in English.A.three-fifths B.three-fifth C.third-five D.third-fifths,真题训练,2.Nine _ pounds a week?Thats very good.A.hundred of B.hundreds of C.hundreds D.hundred,
