14数词.docx

1、14数词数词1.基数词的构成及其说明1）112是独立的单词。即： one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve2)1319,多数在末尾加-teen,但应注意13、15、18的拼写形式。例如：13thirteen 14fourteen 15fifteen16sixteen 17seventeen 18eighteen19nineteen3)从2090整十位数，多数在词尾加-ty，但要注意20、30、40、50和80的拼法。例如：20twenty 30thirty 40forty50fifty 6

2、0sixty 70seventy80eighty 90ninety4)2199是由几十和几合起来构成，中间加连字符（-）。例如：21twenty-one 32thirty-two 55fifty-five74seventy-four 86eighty-six 99ninety-nine5)101999等三位数中，十位数或个位数的前面加and。例如：101a(one)hundred and one230two hundred and thirty513five hundred and thirteen678six hundred and seventy999nine hundred and ni

3、nety-nine6)1,000以上的数，要用计数逗点，即从个位开始，每隔三位数加一逗点，第一个逗点处是thousand(千)，第二逗点处是million(百万)，第三个逗点处是thousand million(英)或billion(美)（十亿）。例如：一千1，000a(one)thousand 4,596four thousand five hundred and ninety-six一万10，000ten thousand 18,261eighteen thousand two hundred and sixty-one十万100，000a(one)hundred thousand 766

4、,132seven hundred and sixty-six thousand one hundred and thirty-two一百万1，000，000a(one)million 4,538,536four million five hundred and thirty-eight thousand five hundred and thirty-six一千万10，000，000ten million一亿100，000，000a(one)hundred million十亿以上的数，英美说法不同。十亿10，000，000，000英国 a(one)thousand million美国 a(o

5、ne)billion百亿10，000，000，000ten thousand million注意 汉语中有百、千、万、亿等单位，而英语中有hundred(百)，thousand(千)，million（百万）等，但没有表示万和亿的专门单词，要用十进位的方法推算出来。例如：thousand千 ten thousand万hundred thousand 十万million百万ten million千万hundred million亿（万万）巧学巧用读数的诀窍有一首歌诀，可以帮助我们迅速地用英语读出长数字。从右向左三逗开，一逗千，二逗百万，三逗就是十万万；左右三位分开读，保你又快又喜欢。“从右向左三逗

6、开”，指从右向左把长数字母三位用逗号分开。如：10，000；225，430；51.000，000，000“一逗千，二逗百万，三逗就是十万万；”指从右向左的第一个逗号表示“千”（thousand）；第二逗号表示“百万”（million）；第三个逗号表示“十万万”（billion,即十亿）。“左右三位分开读，保你又快又喜欢。”指读数时从左向右，每三位三位地按三位数的读法读，遇到有逗号时就分别加上该逗号所表示的那个英语单词。2.hundred, thousand, million与of连用数词hundred, thousand, million等的前面有其他数词，用作确定的数目时，不用复数形式。例如

7、：three thousand三千（不能说：three thousands）five hundred五百（不能说：five hundreds）但是当hundred, thousand, million在用作不确定的数目时，则需用复数形式，并且往往后接of。例如：hundreds of people几百人hundreds of thousands of people几十万人millions of the locusts千百万只蝗虫巧学巧用有hundred等数词有s时有of, 没有s没of；数词前面加，没有s没of；前面无数词，有s也有of。1.序数词的构成及其说明1）序数词第一、第二和第三为fi

8、rst, second和third,其他序列数词的构成是在基数词后加-th。例如：sixsixth sevenseventh tententh fourfourth2)fifth(第五)、eighth(第八)、ninth(第九)和twelfth(第十二)在拼法上有变化。3）二十、三十等基数词变为序数词时，要把y变成ie再加-th。例如：twentytwentiethfortyfortieth4)基数词几十几变成序数词时，表示几十的数词不变，只把表示几的基数词变成序数词。例如：twenty-onetwenty-first forty-fiveforty-fifth5)第一百、第一千、第一百万、第

9、十亿都是在基数词后直接加-th构成。例如：第一百hundredth 第一千thousandth第一百万millionth 第十亿billionth6)序数词的缩略形式是由阿拉伯数字加序数词的最后两个字母构成。例如：1st, 2nd, 3rd, 4th, 21st, 32nd, 40th 2.序数词在句子中的应用序数词在句中主要是充当定语，也可以作主语、表语、宾语，前面要加定冠词the。例如：The first time I came to China, I liked it very much.我第一次来中国，我就非常喜欢这个国家。The first is always better than

10、 the second.第一总是比第二好。She will choose the third.她将选择第三。数词练习题一单项选择( )1There are _ days in a year Athree hundred and sixty five Bthree hundred and sixty-five Cthree hundreds and sixty five Dthree hundreds and sixtyfive( )2Danny lives in _ Aroom 404 BRoom 404 C404 room D404 Room( )3Jim is in _ Aclass on

11、e，grade six Bgrade one，class six CClass One，Grade Six DGrade One, Class Six( )4The bike cost me _ yuan Afive hundred forty Bfive hundreds fourty Cfive hundred and forty Dfive hundred fourty( )5My telephone number is _ Aeighty eight two forty four zero nine Beight eight two double four O nine Ceighty

12、 eight two forty-four zero nine Deight eight two four four zero nine( )6Is there any food for us _? Aten Btenth Cthe tenth Dthe ten( )7Mary is _ girl A. an 8 year old B8一yearsold Cthe 8 years old Dan 8一yearold( )8What day is it today? _ AJune BTuesday CIt is hot DIts fine( )9Whats the date today? _

13、AIts Saturday BIts July CIts fine DIts JuIy 15( )10What time do you get up every day? AIts seven oclock BSeven oclock time CAt seven DOn seven二、单项选择1.The tree is_ tall. A. fourteen foots B. fourteen feet C. fourteen foot D. forty foot2.Fifty plus_ . A. fourty is ninety B. forty is ninety C. thirty i

14、s ninety D. fifty is ninety3.There are_ students in this school.A. four hundred fifty-twoB. four hundreds fifty twoC. four hundred and fifty-twoD. four hundreds and fifty-two4.My home is about_ away from the school. A. three hundred metre B. three hundreds metres C. three hundred metres D. three hun

15、dred metre5.December is_ and last month in a year. A.the twelveth B.twelve C.the twelfth D.twelfth6. _of the teachers in the school are from colleges. A.Three quarters B.Two-third C.Two fifth D.Two-ninth7.There were two world wars during_ century. A.the twenties B.the twentieth C.twenties D.twentiet

16、h8.In the forties, his father served in the New_ Army(新四军)，while his mother worked in the Route_ Army(八路军). A. Fourth; Eighth B.Four; Eighth C.Fourth; eight D.Fourth; eighth9.We are learning_ now. A.the twenty-first lesson B.Lesson Twenty-first C.the 21 th lesson D.Lesson 21 st10.He will stay here f

17、or_ . A.one and half month B.one and a half month C.one months and a half D.one and a half months11.Whats the date today?Its_ . A.nine B.Monday C.June 5 D.11:0012.Would you like to eat_ apples? No, thank you. A.more two B.two more C.two another D.two else13.He said he would come back in_ . A.one or

18、two days B.o or two days C.one and two days D.a day and two14.How often do you write to your parents abroad? . A.Twice a month B.Second times a month C.A second time a month D.second a time a month15._ people died in the traffic accidents in the world. A.Thousand ofB.Thousands ofC.Ten thousands ofD.

19、Ten thousand of 16.In the 1850s, about_ was covered by forest in the USA. A.third B.a third C.the third D.a thirds17.This is her_ birthday, I think. A.twenty B.twentieth C.the twentieth D.the twentys18.September_ is TeachersDay. A.the ten B.tenth C.the tenth D.the tens19.There are_ children in the c

20、ountry school. A.two thousand five hundred and sixty B.two thousands five hundred and sixty C.two thousands five hundreds and sixty D.two thousand five hundreds and sixty20._ the soldiers is about two thousand. A. A number B. The number of C. A great number D. The biggest numbers of一、15BBCCC 610ABAAD1115CBAAB 1620BBCAB