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初中英语数词讲义

初中英语数词讲义
初中英语数词讲义

讲义3:数词

一数词的分类(数词分基数词和序数词)

基数词是表示自然数列的词, 例如; one, two, three, four…..

序数词是表示先后顺序的词, 例如: first, seco nd, third, fourth…

二基数词和序数词的表示法

1.基数词单词的拼写:1~12为单词,13~19都以后缀-teen结尾,20至90这样的整十数都以后缀-ty结尾,其他基数词中间加连字符号“-”再按照上述的变化进行。

例:21→twenty-one 56-- fifty-six 85→eigh ty-five

三位数的构成为:几+百+and+末两位(或末一位)数

例:132→one hundred and thirty-two

205→two hundred and five

千以上的数字的读法:从后面往前,每三位数作为一个单位,分别为thousand, million.

32, 548, 652, 读作:thirty two million, five hundred and forty eight thousand, six hundred and fifty two

2. 序数词=基数词+th (1、2、3为first, second, third)。但以下几种情况要注意:

1) fifth (第五),eighth (第八),ninth (第九),twelfth (第十二)

2) 以ty结尾的基数词变词尾为tieth

例:twenty→twentieth, ninety→ninetieth

3)复合序数词只需要将相应基数词中最后一位变成序数词,其余不变。

例:第二十一→twenty-first

第二百四十五→two hundred and forty-fifth

三.基数词的用法:

1、表示计量:表示事物的计量,即事物的长度、宽度、深度和高度,应采

用基数词。

如:It is 50 metres/kilometers/miles long (wide, deep, high).它有50米/千米/英里长(宽、深、高)。

2、表示编号:编号的数字如果过小,可用序数词或基数词表示;如果数字较大,通常用基数词表示。

如:The tenth lesson=Lesson Ten 第10课

Room 405 第405号房

Page 215 第215页

No.14 Middle School 第14中学

Telephone NO.5855806 电话:5855806

【重点】

3、表示不确切的数字:基数词后面直接加上复数名词表示精确的数字,而基数词复数形式加上“of” 表示不确切的数字。

如:five hundred students 500名学生

hundreds of students 几百名学生

millions of workers 成千上万的工人

4、用基数词表示年龄和岁数

1)表示年龄的主要句式如下:

He is a boy of 10 yeas old. 他是个10岁的男孩子。

He is 10(years of age). 他10 岁。

He is a ten-year-old boy. 他是个10岁的男孩子。

2) 介词in+ one’s twenties (thirties…) 表示“在某人20多岁(30多

岁……)”。

如:My father is in his fifties. 我爸爸50多岁。

When he was in his forties, he began to learn English. 当他40多岁时,

他开始学英语。

【难点】

5、表示年代:表示什么世纪,什么年代时,通常在数词后加s或’s,并在年代前加

冠词the ,如1980’s

(20世纪80年代),读作:nineteen eighties.

如:His grandfather died in the 1970’s。他爷爷死于20世纪70年代。【重点】

6、表示分数:分数的表达方式是:分子用基数词,分母用叙述词。分子是

one时,

母不必加s; 分子大于one时,分母要加s.

如:one-fifth 五分之一two-thirds 三分之二three-fourths 四分之三

7、表示百分数:百分数的表达方式是:基数词+ percent(单数形式)+of+

名词。

如:Thirty percent of the students in my class are from cities. 我班30%的学生来自城市。

About 61 percent of the surface is covered by water. 大约61%的表面被

水覆盖着。

【重点】

8. 有关倍数表示法

两倍用twice, 三倍以上用数词+times, 要注意倍数在句子的位置。

1).主语+谓语+倍数(或分数)+ as + adj +as。

例如:I have three times as old as you. 我有你三倍那么大。

2).主语+谓语+倍数(分数)+the size (amount,length…) of

例如:The earth is 49 times the of the is size of the moon. 地球是月球的49倍。

3)主语+谓语+倍数(分数)+形容词(副词)比较级+than…

例如:I have three times older than you.

4).by+倍数,表示增加了多少倍。

例如:The number of students in our class has been increased by four times now.我们班学生的数量已经增加了四倍。

四.随堂练习:

( ) 1. There are ______ days in a year.

A. three hundreds sixty-five

B. three hundreds and sixty-five

C. three hundred and sixty-five

D. three hundred and sixty five

( ) 2. There are______ students in this school.

A. eight hundreds and forty-six

B. eight hundred and forty six

C. eight hundred and forty-six

D. eight hundred forty-six

( ) 3. ______people visit this museum every day.

A. Hundred

B. Hundreds

C. Hundred of

D. Hundreds of

( ) 4. There are two______ people in the meeting room.

A. hundred

B. hundreds

C. hundreds of

D. hundred of

( ) 5. Every year ______ watch NBA on TV.

A. million people

B. millions of people

C. millions people

D. million of people

( ) 6. ______ trees have been planted in our school in the past 10 years.

A. Thousands of

B. Two thousands

C. Thousand of

D. Two thousand of

( ) 7. Look! There are ______ in the sky.

A. thousand stars

B. thousand of stars

C. thousands of stars

D. thousands of star

( ) 8. My brother is in______.

A. Three Class, One Grade

B. Class Three, Grade One

C. Grade One, Class Three

D. class three, grade one

( ) 9. We are going to learn______ this term.

A. book six

B. six book

C. the book six

D. Book Six

( ) 10. Please turn to______. Let's read the text aloud.

A. Page Two

B. the page two

C. second page

D. page second

初中英语数词专项

数词讲解专项练习 1 数词的讲解 一、定义:表示数目或顺序 二、分类:分为基数词和序数词两种。表示数目或数量多少的词叫基数词;表示数目顺序的词叫序数词。 三、基数词的构成: 1)1-12的基数词是独立的单词,即:one ,two ,three ,four ,five ,six ,seven ,eight ,nine ,ten ,eleven ,twelve 。 2)13-19的基数词以-teen 结尾。如:fourteen ,seventeen 等,但13,15,18较特殊,13—thirteen, 15—fifteen, 18—eighteen 。 3)20-90的整十位均以-ty 结尾。如:sixty ,ninety ,但20,30,40,50,80较特殊,20—twenty, 30—thirty, 40—forty, 50—fifty, 80—eighty 。 4)十位数与个位数之间要加连字符号"-" ,如:28-twenty-eight ,96-ninety-six 。 5)百位和十位(若无十位则和个位)之间加and ,如: 148—one hundred and forty-eight 406—four hundred and six 6)hundred (百),thousand (千),million (百万),billion (十亿)等前面即使有具体的数词,several, some, many也不能在它们的后面加-s 。如:six hundred,eight million。如果表示不确定数目时,用hundreds of /thousands of /millions of /billions of +名词复数, 前面不能再加数字。 7)1000以上的数字,从后往前数每三位加一个逗号" ," 第一个逗号前为千(thousand ),第二个逗号前为百万(million ),第三个逗号前为billion (十亿)。英语中无“万”这个词,我们可以用" 几十个千(thousand )" 表示几万," 几百个千(thousand )" 表示" 几十万" 。如:2,510=two thousand five hundred and ten 84,296=eighty-four thousand two hundred and ninety-six 274,350=two hundred and seventy-four thousand three hundred and fifty。 四、序数词的构成: 1)序数词一般是以与之相应的基数词尾加-th 构成,如:fourth, tenth, 但以下的这些基数词变为序数词时,有特别之处。 One —first, two —second, three —third, five—fifth, nine —ninth, twelve —twelfth 2)以_ty 结尾的单词,要先变y 为i, 在加-eth. 。如:thirty —thirtieth, fifty—fiftieth 3)以one, two, three 等结尾的多位数词,要将个位数变成序数词。如: twenty-one —twenty-first, one hundred and one—one hundred and first 注意:序数词前常用定冠词,有时还可以用不定冠词a/an 则表示" 又一" 的意思。(没有具体范围的限制)如: Mr. Brown has a second car. 布朗先生另外还有一辆车。 He has tried a second time. 他又尝试了一次。 五、数词的应用 1)时刻的表示:小时、点钟、分钟、秒钟要用基数词。 ①“几点钟”用基数词加o'clock 。o'clock 可省略。如:5点钟-five (o'clock ) ②“几点过几 分” , ≤30分钟" 用介词past 。如: 7:15— fifteen/ a quarter past seven 7:30— half past seven

初中英语语法数词详解(打印版)讲课讲稿

数词 . 1.基数词 (1)基数词的具体形式如下: A.从1——10 one,two,three,four,five,six,seven,eight,nine,ten. B.从11——19 eleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen. 注:标记为蓝色的单词特殊记忆,其他的词都是由其个位数形式后添加后缀-teen 构成。 C.从21——99 整数几十中除twenty,thirty, forty,fifty,eighty为特殊形式外,sixty,seventy,ninety都是其个位数形式后添加后缀-ty构成。表示几十几时,在几十和个位基数词形式之间添加连字符“-” 21 twenty-one 76 seventy-six D.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上and. 101 a hundred and one 320 three hundred and twenty 648 six hundred and forty-eight E.千位数以上 “,”前 的数字后添加thousand(千),第二个“,”前面的数字后添加million(百万),第三个“,”前的数字后添加billion(十亿)。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。 2,648 two thousand six hundred and forty-eight 16,250,064 sixteen million two hundred and fifty thousand sixty-four 5,237,166,234 five billion,two hundred and thirty-seven million,one hundred and sixty-six thousand,two hundred and thirty-four(注:只有百跟十之间才有and) (2)基数词的用法 A.基数词在表示确切的数字时,不能使用百、千、百万、十亿的复数形式;但是,当基数词表示不确切数字,如成百、成千上万,三三两两时,基数词则以复数形式出现。 There are hundreds of people in the hall. 大厅里有数以百计的人。 Thousands and thousands of people come to visit the Museum of Qin Terra-Cotta Warriors and Horses every day. 每天有成千上万的人来参观秦兵马涌博物馆。

新初中英语语法知识—数词的知识点训练(1)

一、选择题 1.—How long is the bridge? —About ______ long. A.two thousand meter B.two thousand meters C.two thousands meter D.two thousands meters 2.About _____________ of the students this year were born in the 1990s. A.three five B.three fifths C.third fifths D.third fifth 3.The __ Winter Olympics will be held in Pyeongchang(平昌),South Korea on Feb. ____, 2018. A.twenty-three; nine B.twentieth- three; nineth C.twenty-third; ninth D.twentieth-three; ninth 4.Two-child policy has been carried out. Most parents are planning to have their child. A.one B.two C.first D.second 5.—How much is the computer? —About three yuan. A.thousand B.thousands of C.thousands 6.—Zhapo has a really beautiful beach, doesn't it? —Yes, ________ travelers like to come here for a visit. A.thousands of B.thousand of C.thousand D.three thousands 7.——What should we do now, Mr.Li? ——Please turn to Page_____and look at the_____picture. A.Twelfth;fifth B.Twelve; fifth C.Twelve;five D.Twelfth;five 8.--Many young people came to Zhongshan in ______.When did he come to Shenzhen? ---When he is an ______ boy,he came here with his parents. A.1980s; eight years old B.1980s; eight-year-old C.the 1980s; eight-year-old D.the 1980s; eight-years-old 9.This is my ________ time visit to America. I have never been there before. A.one B.two C.first D.second 10.Harry’s mom looks young and beautiful. It’s hard to imagine she is already _________ her _________. A.in; fifty B.in; fifties C.on; fifties D.in; fiftieth 11.Leonardo was born in ________ in Los Angeles. Last year, he won his ________ Oscar in the 88th Academy Awards (奥斯卡奖). A.1980;first B.the 1980s;the first C.1980s;first D.the 1980s;first 12.Nearly ________of the American children get money from their part-time job.

【英语】初中英语数词专题训练答案

【英语】初中英语数词专题训练答案 一、初中英语数词 1.There are children in my grandfather's family and he is the child of the family. A. nine; fifth B. nine; five C. ninth; five D. ninth; fifth 【答案】 A 【解析】【分析】句意:我外公家有9个孩子,并且他是第五个孩子。A.nine;fifth9;5; B.nine;five 9;5; C.ninth;five 第九;5 D.ninth;fifth 第九;第五。根据第一个空可知,此处填入基数词,答案为nine,第二个空填入序数词,答案为fifth,故选A。 【点评】考查了基数词与序数词的辨析,注意,区分两者。 2.______ of the students in our school are boys. A. Two three B. Second three C. Two thirds D. Two third 【答案】 C 【解析】【分析】句意:我们学校的学生中有三分之二是男生。分数词是分子是基数词,分母是序数词,分子大于一,分母加s,因此二分之一是two thirds,故选C。 【点评】考查分数,注意分子是基数词,分母是序数词,分子大于一,分母加s的用法。 3.—Where is Class ______? —It's on the ______ floor. A. Six; third B. Sixth; third C. Six; three D. Sixth; three 【答案】 A 【解析】【分析】句意:——六班在哪里?——在六楼。六班,Class Six,专有名词,六楼,the sixth floor,使用序数词,故答案是A。 【点评】考查数词的用法,注意基数词和序数词的用法区别。 4.There are 24 solar terms in a year. Grain Rain often starts in April, the ________ month of the year. A. Third B. fourth C. fifth 【答案】 B 【解析】【分析】句意:一年有24个节气。谷物雨通常在一年中的四月开始。A:Third 第三;B:fourth第四;C:fifth第五。空格前有定冠词the与可数名词单数month,要用序数词。根据 Grain Rain often starts in April ,可知四月份是一年中的第四个月,要用序数词fourth,故选B。 【点评】考查序数词辨析。根据语境和生活常识,选择正确的序数词。 5.Please pass me ___book on the right. A. four B. fourth C. the four D. the fourth 【答案】 D 【解析】【分析】句意:请递给我右边的第四本书。句中book是单数,four后面用可数名

初中英语语法专项练习题之数词

初中英语语法专项练习题之数词 1. 1). There are ___ days in a year. A. three hundreds sixty-five B. three hundreds and sixty-five C. three hundred and sixty-five D. three hundred and sixty five 2). There are____ students in this school. A. eight hundreds and forty-six B. eight hundred and forty six C. eight hundred and forty-six D. eight hundred forty-six 2. 1).______people visit this museum every day. A. Hundred B. Hundreds C. Hundred of D. Hundreds of 2).There are two___ people in the meeting room. A. hundred B. hundreds C. hundreds of D. hundred o 3). Every year ___ watch NBA on TV. A. million people B. millions of people C. millions people D. million of people 4). ____ trees have been planted in our school in the past 10 years. A. Thousands of B. Two thousands C. Thousand of D. Two thousand of 5). Look! There are ___ in the sky. A. thousand stars B. thousand of stars C. thousands of stars D. thousands of star 3. 1). My brother is in____.

新初中英语语法知识—数词的知识点训练及答案

一、选择题 1.________of the students in our class________ going to the summer camp in Beijing next week. A.Two fifths; are B.Second fifths; are C.Two fifths; is D.Two fifth; are 2.---How often does the boy play sports? ---__________ A.Once a week B.Four hours C.In an hour D.At 7pm 3.--- What does “three quarters” mean, Li Ping? ---I see. It means __________. A.15 minutes B.one third C.fourth three D.three fourths 4.The __ Winter Olympics will be held in Pyeongchang(平昌),South Korea on Feb. ____, 2018. A.twenty-three; nine B.twentieth- three; nineth C.twenty-third; ninth D.twentieth-three; ninth 5.Two-child policy has been carried out. Most parents are planning to have their child. A.one B.two C.first D.second 6.—How old is your sister? —______________.We had a special party for her ______________ birthday yesterday. A.Twenty-one;twenty-first B.Twenty-first;twenty-first C.Twenty-one;twenty-one D.Twenty-first;twenty-one 7.—______________ do you read English newspaper? —At least ______________ a week. A.How long;one B.How often;twice C.How many;once D.How much;third 8.The shoe factory is only about ______ walk from our school. A.half an hour’s B.half and an hour’s C.half an hours’9.—When did you start to collect stamps? —I got my ______ stamp when I was ______ years old. A.one, seven B.one, seventh C.first, seventh D.first, seven 10.---I am going to take this summer holiday in Taiwan. ---Oh, really? Taiwan is ______ a beautiful island that ______ people in Guangdong go to visit it every year. A.so; thousands B.so; thousands of C.such; many thousand D.such; thousands of 11.Every year there are about _______ people waiting for their trains back home in the railway station before Spring Festival comes. A.five thousand of B.five thousand C.thousand of D.five thousands of 12.Nearly ________of the American children get money from their part-time job.

初中英语数词专项练习

数词 数词分为基数词和序数词两种。表示数目或数量多少的词叫基数词;表示数目顺序的词叫序数词。 一. 基数词 1. 基数词就注意以下几点: (1)几十几的基数词的十位数与个位数之间要用连字符“-”连接。如: eighty-five 85 twenty-six 26 (2)三位数的基数词须在百位和十位(若无十位则和个位)之间用and连接。如: three hundred and sixty-five 365 two hundred and six 206 (3)基数词的复数形式。当基数词hundred, thousand, million, billion等词前有具体数词或several修饰时,必须用单数。如: several hundred year’s ago几百年前 two thousand students两千个学生 2. 基数词的特殊用法: (1)表示“几十年代”或“几十岁”时,用逢十的基数词的复数形式。如: in the 1990’s 20世纪90年代 in o ne’s twenties在某人20多岁时 (2)用在习语中。如: in twos and threes三三两两地 二. 序数词 序数词应注意的几点事项: 1. 多位数的基数词变成序数词时,只需将末位基数词变成序数词,前边的基数词不变。如: forty-two 42 forty-second第42 nine-hundred 900 nine-hundredth第900 2. 当序数词用阿拉伯数字表示时,必须在数字后加上序数词的最后两个字母。如: 21st第21 32nd第32 3. 序数词前一般要用定冠词the,如果序数词前用a或an时,则表示“又一;再一”(没有具体范围的限制)。如: Though he had failed twice, he wanted to try a third time. 尽管他已失败了两次,他还想再试一次。 The little monkey had had three apples, and he wanted to eat a fourth one. 那只小猴子已经吃了3个苹果,他还想再吃一个。 三. 分数和百分数 1. 分数 (1)分数的分子用基数词,分母用序数词。如: one fifth五分之一 one tenth十分之一 (2)当分子大于1时,分母用序数词的复数。如: two thirds三分之二 five eighths八分之五 (3)当分子是1时,可以用one也可以用a。如: a second = one second a third = one third (4)当分母是2和4时,分别可以用half和quarter代替。如:

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