基数词和序数词

1、基数词和序数词表示数目多少的词叫基数词:100以卜的根本基数词100以上1-1011-1920-90100a/one hun dred;1000a/one thousa nd;1,000,000a/one millio n;1,000,000,000a/one billi on美a/one thousa nd milli on英1 one11 eleve n20 twenty2 two12 twelve30 thirty3 three13 thirteen40 forty4 four14 fourtee n50 fifty5 five15 fifteen60 sixty6 six16 sixt

2、ee n70 seve nty7 seven17 seve ntee n80 eighty8 eight18 eightteen90 nin ety9 nine19 nin etee n10 ten表示顺序的数次叫序数词:注意：Hun dredthousa ndmillio n根本序数词的构成1st first11th eleve nth20 th twen tieth30th thirtieth2nd sec ond12th twelfth21st twe nty-first40th fortieth3rd third13th thirtee nth22nd twen ty-sec ond5

3、0th fiftiethth4 fourthth14 fourtee nthrd23 twe nty-thirdth60 sixtieth5th fifth15th fiftee nth24th twenty-fourth70th seve ny ieth6th sixth16th sixtee nth25 th twe nty-fifth80th eightieth7th seve nth17th seve ntee nth26th twen ty-sixth90th nin etiethth8 eighthth18eightee nthth27twen ty-seve nthth100 o

4、ne hundredth9th ninth19th nin etee nth28 th twe nty-eighty1,000 th one thousangth10th tenth29 th twe nty-ninth1,000,000 th one millionth100,000,000 th one billionth1. 其前有具体数字时，用单数：There are thousand students in this in this school.这所学校大约有2000名学生。2. 前无数词，模糊数字 +s+of 短语： Hundredsof people cometo see ou

5、r ' s so great.成百的人来看我们的戏剧，它太成功了。3. 基数词变序数词口诀：基变序，很容易，结尾加上th。一二三特殊记，结尾各是t,d,d。八去t,九去e,f来把ve替,主语：Four of them went to the factory.他们四个人去了工厂。宾语：I want two.我要两个。定语：There thirty classrooms in our school.我们学校有 30 个教室。表语：My classmate is eighteen.我的同学 18 岁。He is only three,and he can't dress himsel

6、f.他只有三岁，不会穿衣服。同位语： We three will go there together.我们 3 个一起去。y 改为 ie, 结尾仍有 th 。假设是遇到几十几，只变个位就可以。 三 基数词的用法：1. 基数词在句中可用作主语、宾语、表语、定语和同位语。注意： 1 以上的基数词作定语时，它所修饰的名词要用复数形式：The road is 16 meters in width.这条路十六米宽。18 American students came to our school yesterday.昨天有 18 个美国学生来到我校。四序数词的用法：主语：The second is what

7、 I really need宾语：He chose the second.定语：We are carry out the first plan.表语：She is the second in our class.注意：1. 序数词可以在句子中当主语、宾语、定语、表语。第二个是是我真正需要的。他选了第二个。我们将执行第一个方案。在我们班她是第二名。1. The nine students are in Class Five.2. The ninth student is in Class Five.3. 序数词前用不定冠词的常见情况： 序数词前加“ a表“再一次。May I have a sec

8、ond try? 我能再试一次吗？ Now tell me why you took a second arrow. 在名次中排“第几这九个学生都是五班的。第九个学生是五班的。告诉我，为什么你手里拿着另一支箭？You should try to get a first or a second in the examination. 中得个第一、二名。 表示任何一个“第几者 。We don' t allow a third to have a hand in this matter.你应力争在这次考试我们不允许第三者插手此事。 当“分数词用表示“几分之几 A third of the s

9、tudents failed in the exam.三分之一的学生在这次考试中没及格。2. 先分钟后时刻法：整点用o' clock,半点用half. > 30用to ,v 30用和45分钟用quarter15 分钟 )8 o ' clock 八点 half past eight .a quarter to twelve twenty-nine to eight上午八点半差一刻 12 点差 29 分八点五时间表达法：1. 顺序法 seven five 7:05 seven fifty-two 7:52 seven thirty 7：30twenty-nine past e

10、ight 8:29 六数词的固定搭配：in one 合为一体 one and the same 同一个on one hand 一方面 by twos 成双成对in two 一分为二 second to none首屈一指five-star 一流的；五星的 at sixes and sevens 乱七八糟 ten to one十分之九 a hundred and one 许多双方均有in twos and threes 三三两两；稀稀拉拉 It takes two to do something 责任。Two heads are better than one三个臭皮匠，顶个诸葛亮七年、月、日的顺

11、序： 日、月、年 5 Ja ne 2005 月、日、年 Jane 5 2005in the 1990 ' s (nineteen nineties) 20世纪 90 年代.=seven four two .公元前 724 年. 公元 2000 年八 年龄表达法：一个十七岁的女孩a 17-year-old girl agirl 17 years old a girl of 17 a17girl aged其他：416 房间： Room 4161 路公共汽车： Bus 1幸福大街 81 号： ,Xingfu street零)five 号码 256-9905 ： five six nine n

12、ine( 两个 9 也可表示为： double nine)0( 邮政编号 100056;Postcode/Zip code one 0(零)0 0 five six:five point zero seven eight1/3:one-third3/5:three-fifths8%:eight percentPage120 第 120 页倍数表达法：三次以上用“基数词 +times ，两倍用 twice 或 double 。The earth is 49 times the size of the moon.地球是月球的四十九倍。算式加减乘除表示法： 加、乘算式中，谓语动词即可用单数也可用复数，但减、除算式中，谓语动词只能用单数。 5+6=11 five and/plus six is/are/makes/make/equal/equals eleven.25X 4=100 Twenty-five times (multiplies) four are one hundred.12 7=5 Twe