数词讲解(共27张PPT)+练习(含答案)+默写版

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名称 数词讲解(共27张PPT)+练习(含答案)+默写版
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(共27张PPT)
数 词
数词的构成
PART 01
基数词&序数词
01
基数词·拼写
基数词1~12: one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve
基数词13~19由3~9加后缀teen构成。如:14-fourteen,19-nineteen
(注意:thirteen,fifteen,eighteen稍有变化)。
基数词20~90等十位数由2~9加后缀ty构成。如:
20-twenty,30-thirty,40-forty,50-fifty,60-sixty,70-seventy,80-eighty,90-ninety
基数词21~99由十位数加个位数构成,中间必须有连字符(-)。如:
21:twenty-one,43:forty-three,75:seventy-five
hundred, thousand, million(百万), billion(十亿)
- 有确定数字时,不能加s,如:three hundred
- 后接of时,要加s,可以有不确定数字。如:many thousands of books
试试看
1234567890
billion
million
thousand
one billion, two hundred and thirty-four million, five hundred and sixty-seven thousand, eight hundred and ninety
序数词·拼写
序数词的构成是以基数词为基础:
第一到第十二:一般是在基数词词尾加th;
第一(first)、第二(second)、第三(third)、
第五(fifth)、第八(eighth)、第九(ninth)、第十二(twelfth)比较特殊。
以ty结尾的整十数,y变成i再加eth。如: 第二十(twentieth)
表“几十几”,变个位数。如: 第三十六(thirty-sixth)
序数词的缩写形式为“阿拉伯数字+最后两个字母”。如:
first 1st second 2nd third 3rd fourth 4th twenty-first 21st
一、二、三,特殊例,结尾各是t,d,d。
-th,四加起,八少t,九去e,y结尾改ie;
-ve结尾变f,five,twelve是两兄弟。
若是遇到几十几,只变个位就可以。
数词的用法
PART 02
02
表示具体数目
基数词 + (hundred/thousand/…) + 可数名词
one hundred years 一百年
表示概数
hundreds/thousands/… + of + 可数名词复数
several/many/some/… +(hundred/…) + 可数名词复数
several/many/… + hundreds/… + of + 可数名词复数
表示数目
几点整:整点时刻数 + o’clock
如:twelve o’clock 十二点
几点几分:时刻数 + 分钟数
如:six twenty 六点二十
几点过几分:分钟数 + past + 时刻数
如:five past six 六点五分
差几分几点:“60-分钟数” + to + “时刻数+1”
如:five to six 五点五十五分
表示时刻
年:基数词,从右往左两位断开,从左往右读。
1998 nineteen ninety-eight 2000 two thousand
月:名词,可用缩写表示 January (Jan.)
日:the + 序数词 21日 the twenty-first
世纪:the + 序数词 + century
二十一世纪 the 21st century
年代: the + 整十年份的基数词 + -’s/-s
20世纪90年代 the 1990s 或 the 1990’s
表示日期
用阿拉伯数字或基数词表示。 如:20/twenty years old二十岁。
at the age of后加基数词,意为“在……岁时”,后面不再加years old。
如:at the age of twenty在20岁时。
“in one’s +整十数的复数形式”表示“在某人几十多岁时”。 如:in his twenties在他二十多岁时。
基数词-year-old+可数名词单数,表示“整岁的……” 如:a ten-year-old girl 一个十岁的女孩
名词+of+数词 如:a boy of eight 一个八岁的男孩
“快满…岁”,常用进行时或将来时表达。 如:He will be fourteen. 他快十四岁了。
“不满…岁”,常用副词nearly, almost, quite, yet, just等。
如: He is nearly 80 years old. 他快八十岁了。
“超过…岁”,用介词past。
如: He started his work when he was past 60. 当他六十多岁时,他开始了他的事业。
表示年龄
表示计量
长、宽、高、面积、重量等:
基数词+单位词 +形容词 1500 kilometers long
基数词+单位词+in+名词 15 kilometers in width
距离:基数词+里程单位 20 kilometers
基数词+时间单位+交通方式 two-hour train ride
基数词+时间单位所有格+交通方式 two hours’ walk
温度:非零下温度: 基数词+degree(s) + 单位词 ten degrees Celsius 10℃
零下温度: 基数词+degree(s) + below zero+单位词 five degrees below zero centigrade -5℃
表示价格
基数词 + 货币单位 30 dollars = $30
A/One penny saved is a penny earned. 省一分就赚一分。
表示倍数
倍数 + as +形容词/副词原级 + as + 比较对象
We have two ears and a mouth so that we can listen twice as much as we speak.
我们有两只耳朵和一张嘴,以至于我们能听见的是我们能讲的两倍。
倍数 + as many + 可数名词复数 + as + 比较对象
I have twice as many books as you.我拥有的书是你的书的两倍那么多。
倍数 + as much + 不可数名词 + as + 比较对象
Americans eat twice as much meat as people in other countries.
美国人的食肉量是其他国家的人的食肉量的两倍。
倍数 + the size/length/depth/width/… + of + 比较对象
This book is small and easy to carry, just half the size of most American magazines.
这本书小巧并便于携带,只有大多数美国杂志的一半大。
表示倍数
倍数 + 形容词/副词比较级 + than + 比较对象
An adult panda weighs many times more than a baby panda.
成年熊猫的体重比熊猫宝宝重许多倍。
动词 + by/to +倍数/百分比
The number of students from rural areas will be increased by 10% in 2017. 2017年来自农村地区的学生将增加10%。
by表示增加了,to表示增加到。
分子用基数词,分母用序数词;先读分子,再读分母。
分子大于1时,分母用复数。
1/3 a third / one third / one-third
2/5 two fifths / two-fifths
half为二分之一,quarter可表示四分之一。
带分数:整数+and+分子+分母
one and two thirds
two and one fourth / two and a quarter
表示分数
小数: 基数词 + point + 基数词
小数点读作point, 小数点前基数词一般读法,小数点后数字逐个读。
34.52 thirty-four point five two
0.18 zero point one eight
百分数: 基数词 + percent
1% one percent
55% fifty-five percent
表示小数和百分数
表示编号
number + 数词 number 常简写为No.
the No.1 bus 一路公交车
No.1 Renmin Road 人民一路
名词 + 基数词
Lesson 1 / Lesson One 第一课
the + 序数词 + 名词
the fifth week 第五周 the eighth grade 八年级
电话号码,邮政编码,身份证号码等均为基数词,从左往右依次读出
6123456 six one two three four five six
构成复合形容词
基数词 + 可数名词单数
a one-week holiday 一周的假期
a 2-hour ride 两小时的车程
the ten-floor building 十层的建筑
a 100-square-foot house 一百平方英尺的房子
基数词 + 可数名词单数 + 形容词
a ten-year-old boy 一个十岁的男孩
a 3-meter-wide room 一个三米宽的房间
a one-eyed camel 一只独眼的骆驼
默写检测
PART 03
03
用法检测
PART 04
04
It is said that the big fish in the lake is about ______.
A. four meters long  B. four meter long
C. four-meter long  D. four-meters long
【答案】 A
【解析】A。 本题考查形容词作表语的用法,表示某物多长、多宽或者多高,把形容词放在后面,中间的名词用复数形式,这些词中间不用连字符。
13. There are _____days in a year.
A. three hundreds sixty-five      B. three hundred and sixty-five 
C. three hundred and sixty five    D. three hundreds and sixty five
【答案】 B
【解析】B。本题考查基数词的用法,三位数的基数词表达是百位和十位间用 and,十位和个位间用连字符。
易错点拔
We gave away ____ books to the school library last year.
A. six thousands B. six thousand
C. six thousands of D. six thousand of
【答案】 B
【解析】句意:去年我们向学校图书馆赠送了六千本书。数词后thousand用单数,thousands of,固定搭配,几千个,不与数字搭配;因此是six thousand或者thousands of,只有B对,故选B。
易错点拔
Please pass me ___book on the right.
A. four B. fourth C. the four D. the fourth
【答案】 D
【解析】句意:请递给我右边的第四本书。句中book是单数,four后面用可数名词复数,排除A、C, 所以用序数词fourth, 序数词前常常加the ,故选D。
易错点拔
In our class of the students girls.
A. third fifths; is B. third fifth; are
C. three fifth; is D. three fifths; are
【答案】 D
【解析】句意:我们班五分之三的学生是女生。带有分数的短语作主语时,谓语动词由分数后面的名词形式来决定,students是复数形式,谓语动词要用are,故选D。
1. My mother will be ________ years old next week. I’m planning to buy a gift for her ________ birthday.(40,填英文)
2. Four ________ (seven) of the people are going to plant trees on the hill tomorrow.
3. I am in my ______(three) year in this middle school.
4. They worked for twelve days, and finished ____ second task successfully.
5. September is the _____(nine) month in a year.
sevenths
forty
fortieth
third
the
ninth数词练习
I. 单项选择
1. —Good morning, Madam. Can I help you
  —Sure, I’d like ________for cooking vegetables.
two cups of tea B. three pieces of bread C. five kilos of oil D. four bottles of milk
2. Nearly _______of the earth _______ covered by sea.
A. three fourth,is B. three fourths,is C. three fourth,are D. three fourths,are
3. —We’ll be back for our school’s ____anniversary ceremony.
 —I see. That means you’ll have a get-together with your classmates in _______ years.
  A. fifteen,seven B. fifteenth,seven C. fifteen,seventh D. fifteenth,seventh
—We should try to devote(献身于) ourselves to our country like Yuan Longping.
—I think so. He still worked on the research into agriculture at the age of _________.
A.eighties B.eightieth C.eighty D.eighty-year-old
He got _____ birthday cakes on his _____ birthday.
A. second; fifteen B. two; fifteen C. second; fifteenth D. two; fifteenth
6. The number of the students in our school is about nine ______. ______ of them are boys.
A. hundred; Two thirds B. hundred; Two third
C. hundreds; Two thirds D. hundreds; Two third
7. My brother is a ______ boy and he can’t go to school now.
A. four years   B. four-year-old   C. four-years-old  D. four years old
8. It is said that the big fish in the lake is about ______.
  A. four meters long     B. four meter long
  C. four-meter long     D. four-meters long
9.Our Party was founded in 1921. We'll celebrate her ______ birthday on July 1st this year.
A. one hundred B. one hundredth C. the one hundredth
My mother will be ________ years old next week. I’m planning to buy a gift for her ________ birthday.
A. fourty; fourtieth B. forty; fortieth C. fourty; fortieth D. forty; fourtieth
11. This is my _____time to play the piano at our school.
  A. second   B. two   C. seconds   D. the two
12. Our English teacher tells us that the _____day of the week is Sunday.
  A. seven   B. seventh    C. first   D. one
13. There are _____days in a year.
  A. three hundreds sixty-five      B. three hundred and sixty-five 
  C. three hundred and sixty five    D. three hundreds and sixty five
14. My grandparents live in an old apartment with _________ floors and they are on the _________ floor.
A. five, five B. five, fifth C. fifth, fifth D. fifth, five
15. There are ______months in a year and December is the ______month of the year.
A. twelve; twelve  B. twelve; twelfth  C. twelfth; twelve  D. twelfth; twelfth
【答案】CBBCD ABABB ABBBB基数词 序数词 中文 英文
一 one first 一周一次 once a week
二 two second 一月两次 twice a month
三 three third 一年三次 three times a year
四 four fourth 三分之一 one third
五 five fifth 三分之二 two thirds
六 six sixth 五分之一 one fifth
七 seven seventh 五分之二 two fifths
八 eight eighth 四分之一 a quarter
九 nine ninth one fourth
十 ten tenth 二分之一 a half
十一 eleven eleventh one second
十二 twelve twelfth 四分之三 three quarters
十三 thirteen thirteenth three fourths
十四 fourteen fourteenth 一百 a hundred
十五 fifteen fifteenth 四百 four hundred
十六 sixteen sixteenth 成百上千的 hundreds of
十七 seventeen seventeenth 一千 a thousand
十八 eighteen eighteenth 六千 six thousand
十九 nineteen nineteenth 成千上万的 thousands of
二十 twenty twentieth 百分之... percent
二十一 twenty-one twenty-first 百分之七 seven percent
二十二 twenty-two twenty-second 9点15分 nine fifteen
三十 thirty thirtieth a quarter past nine
四十 forty fortieth fifteen past nine
五十 fifty fiftieth 5点45分 five forty-five
六十 sixty sixtieth fifteen to six
七十 seventy seventieth a quarter to six
八十 eighty eightieth 6点30分 six thirty
九十 ninety ninetieth a half past thirty基数词 序数词 中文 英文
一 一周一次
二 一月两次
三 一年三次
四 三分之一
五 三分之二
六 五分之一
七 五分之二
八 四分之一

十 二分之一
十一
十二 四分之三
十三
十四 一百
十五 四百
十六 成百上千的
十七 一千
十八 六千
十九 成千上万的
二十 百分之...
二十一 百分之七
二十二 9点15分
三十
四十
五十 5点45分
六十
七十
八十 6点30分
九十