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1、英语数词用法英语数词用法数词分基数词和序数词两类。一、 数词的分类1. 基数 A从从110one,two,three,four,five,six,seven,eight,nine,tenB从从 1119 一般在后面加一般在后面加teeneleven,twelve, thirteen, fourteen, fifteen, sixteen, seventeen,eighteen, nineteenC从从 2199 整数在后面加整数在后面加-ty特殊特殊:twenty,thirty, forty,fifty,eighty 21 twenty-oneD百位数百位数101 a hundred and
2、oneE千位数以上千位数以上 thousand 千千 million百万百万 billion十亿十亿F1)基数词表示基数词表示确切确切的数时,的数时,不用复数不用复数形式形式. 2)表示表示不确切不确切数,如成百、成千上万,则用数,如成百、成千上万,则用复数复数。There are hundreds of people in the hall320 three hundred and twentyG人的不确切岁数或年代,人的不确切岁数或年代,用几十的复数形式用几十的复数形式。He became a professor in his thirtiesIt was in the 1960sH基数词
3、的句法功能基数词的句法功能可作主语、宾语、定语、表语、同位语。可作主语、宾语、定语、表语、同位语。The two happily opened the box(作主语)(作主语)They three tried to finish the task (作同位语)(作同位语)2. 序数词表示顺序的词称为序数词。表示顺序的词称为序数词。 A第一至第十九第一至第十九特殊特殊: first, second, third, fifth,eighth,ninth, twelfth 其他其他: 添加添加“th”。如。如 sixth、nineteenthB从第二十至第九十九从第二十至第九十九变变y为为i,再加
4、,再加“eth”构成。构成。twentytwentieth thirtythirtieth表示第几十几时,用表示第几十几时,用几十的基数词几十的基数词+连字符连字符“”+个位序数词个位序数词。thirty-first 第三十一第三十一 fifty-sixth 第五十六第五十六seventy-third 第七十三第七十三 ninety-ninth 第九十第九十九九C序数词的缩写形式序数词的缩写形式:阿拉伯数字后加上阿拉伯数字后加上th。firstlst second2nd third3rdfourth4th twentieth20thtwenty-third23rdD序数词的句法功能序数词的句法
5、功能序数词在句中可作主语、宾语、定语和表语。序数词在句中可作主语、宾语、定语和表语。The second is what I really need(作主语)(作主语)He choose the second(作宾语)(作宾语)We are to carry out the first plan(作定语)(作定语)She is the second in our class(作表语)(作表语)注:通常序数词前面要加定冠词注:通常序数词前面要加定冠词 the;但出现不;但出现不定冠词定冠词a或或an时,则表示时,则表示“再再”,“又又”。Well go over it a second time
6、另外,基数词也可以表示顺序。另外,基数词也可以表示顺序。the first lessonLesson Onethe twenty-first roomRoom 21(twenty-one)二、时刻表示法二、时刻表示法1. 几点钟几点钟 5:00 读作读作 five oclock 2. 几点过几分几点过几分 five past seven 七点过五分七点过五分half past six 六点半六点半a quarter past eight 八点过一刻八点过一刻3. 几点差几分几点差几分 ten to eight 差十分八点差十分八点a quarter to twelve 差一刻十二点差一刻十二点
7、twenty to six 差二十分六点差二十分六点1:582:02 another, other, more修饰数词的用法修饰数词的用法1. another A) another+名词单数名词单数 /具体数字的具体数字的复数复数 1Have you finished your report yet? No,I will finish it in 10 minutes Aanother BOther Cmore Dless 2. 数词数词+more3. 数词数词+other,但与定冠词但与定冠词the连用时,连用时,other要要放在数词前。放在数词前。 我想我们再需要我想我们再需要4个人。个
8、人。 I think we need four more people. I think we need four other people. I think we need another four people. 你知道他是在哪儿找到另外两张照片的呢?你知道他是在哪儿找到另外两张照片的呢? Do you know where he found the other two photos?2more还可与还可与a little,a few,a lot,several等等词连用,词连用,more放后面。放后面。(1)课桌上有许多书。)课桌上有许多书。 There are many more bo
9、oks on the desk(2)再喝点茶好吗?)再喝点茶好吗? Would you like some more tea?4. 名词省略名词省略 如果前后意思清楚,如果前后意思清楚,another或或more后面的名词后面的名词可以省去。如:可以省去。如: 1I climbed the stairs slowly,carrying a big suitcase,my father following with two more四、加减乘除表示法四、加减乘除表示法1. “加加”用用plus,and或或add表示表示 How much is two plus three?Two and thr
10、ee is five2. “减减”用用 minusHow much is ten minus six?3. “乘乘”multiply3X4? How much is three times four?4. “除除”用用divide的过去分词形式表示的过去分词形式表示164=? How much is sixteen divided by four?五、分数表示法五、分数表示法1. 基数词作分子,序数词作分母,除了分子是基数词作分子,序数词作分母,除了分子是“1”,其它情况下序数词都要用复数形式,其它情况下序数词都要用复数形式1/5 one fifth three fourths2. 当分数后面
11、接名词时,如果分数表示的值大于当分数后面接名词时,如果分数表示的值大于1,名词用复数;小于名词用复数;小于1,名词用单数。,名词用单数。1 1/2 hours 一个半小时一个半小时读作读作 one and a half hoursOne hour and a half七、百分数表示法七、百分数表示法百分数用基数百分数用基数percent表示表示50 fifty percent百分之五十百分之五十percent不用复数形式。不用复数形式。选择填空。1March is _month of a yearA a three B the third C a third2We will have a me
12、eting at 8:05_Afive to eight Beight five Ceight o five3Eight plus eight is_.Asixteen Bsixty-four Cone4He is an _boyAeight years Beight-year-old Ceight-years-old5We will have a_ walkAten minutes Bten minutes Cten-minutesB the thirdCeight o fiveAsixteenBeight-year-oldBten minutes6The wall is_.Afour me
13、ters long Bfour meter long Cfour-meter long7Whats the date today? Its_AMarch the eight BMarch eighthCeight,March8About_ of the earths surface is covered with water.A. three-fours B. three-fourth C. three-fourthsAfour meters longBMarch eighthC. three-fourths10. He went down to the village which was _miles away from the city.A. three hundreds B. three hundredC. three hundreds ofB. three hundred
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