中考英语复习专题3 数词 课件(共18张PPT)

(共18张PPT)
数词是什么？
数词就是表示事物的数量和顺序的词，分基数词和序数词两种。
Look through the key points on P191~192.
(And then finish the following diagram)
数词
基数词
______________
序数词
表示数量
其他表达法
______________
______________
______________
______________
______________
______________
______________
表示时刻
表示确数和概数
表示年代和岁数
表示在原有基础上增加一定的数量
表示计量
______________
作定语
序数词前要加the
序数词前可加a/an 表“又一，再一”
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Research & Interaction & Extension
表示数量
1. 1~12单独记
2. 13~19 词尾为teen
3. 逢10的单词词尾为ty
4. 21~99 在十位和个位数之间加连字符
5. 101~999 先说几百，再加and，再加末尾两位数
6. 1000以上的数词，从后往前数，每三位用“，”隔开，表示thousand,million, billion
1. 73
2. 238
3. 1,004
4. 18,657,421
seventy-three
two hundred and thirty-eight
one thousand and four
eighteen million, six hundred and fifty-seven thousand, four hundred and twenty-one
Research & Interaction & Extension
1. 4：10
2. 5：15
3. 6：30
4. 7：45
four ten/ ten past four
表示时刻
five fifteen/ a quarter past five
six thirty/ half past six
seven forty-five/ a quarter to eight
总结： 直读法 & 间接表达法
Extension
1. 1996
2. 1905
nineteen ninety-six
nineteen o five/ nineteen and five
4位数年份，常分两组来读
小数 3.91 three point nine one
Research & Interaction & Extension
我有两百万美元。
表示确数，概数
I have two million dollars.
每年必须种植数千棵树。
Thousands of trees must be planted every year.
总结：有具体数字，词尾不加S; 无具体数字，词尾加S，OF
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There are over ____ students in their school.
A. hundreds B. nine hundreds
C. hundreds of D. nine hundred
D
hundred 表示不确定数量时，用复数和OF,且前面不能有其他限定词
Research & Interaction & Extension
The flying disk was invented in the 1950s.
表示年代，岁数
He went to the United States in his twenties.
总结：in + the + 年份+ s 在...世纪...年代
in + one's + 整十的复数 在某人...多岁时
Feedback
在20世纪60年代 在他40多岁时
in the 1960s
in one's forties
Research & Interaction & Extension
表示增加一定数量
我们还需要两把椅子。
We need _______ two chairs. We need two _____ chairs.
林书豪身高1.91米。
Lin Shuhao is 1.91 _____ ______.
表示计量
another
more
meters tall
总结： another + 基数词+ 名次复数 = 基数词+ more + 名次复数
基数词+度量单位+adj (long/wide/deep/high)
Research & Interaction & Extension
作定语
一个15岁男孩
a ________________ boy
步行10分钟的路程
a ___________ walk / ___________ walk
fifteen-year-old
易错点 1.
He is fifteen years old.
fifteen-year-olds
ten-minute
ten minutes'
易错点 2.
连字符后的名词用单数
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Research & Interaction & Extension
序数词的构成
基变序的口诀 《最新中考》P191
1. 第1、2、3
2. 第5、8、9、12
3. 第30、40
4. 第36、98
5. 第199、2002
first second third
fifth eighth ninth twelfth
thirtieth fortieth
thirty-sixth ninety-eighth
只变个位就可以
one hundred and ninety-ninth
two thousand and second
199th/2002nd
Research & Interaction & Extension
序数词的用法
1.乘电梯上2楼，然后向右拐。
Take the lift to ____________ floor and turn right.
2. 第2年他们又有了一个孩子。
The next year they had ____ second child.
3. 他又试了一次。
He tried _____ third time. (前面已经试过两次了)
4. 第5课 （2种）
__________________________ ________________________
the second
a
a
the fifth lesson
Lesson Five
注意：给事物编号时，名词在后用序数词，名词在前用基数词
Extension
易错题
I got a beautiful bike on my ______ birthday. I like it very much.
A. fifteenth B. fifteen
C. my fifteen D. the fifteenth
A
注意: 当序数词前有形容词性物主代词时，不能再加冠词。
分数的表达、用法
表达：
2/3
5/9
1/2
3/4
two thirds
five ninths
a half
three quarters
用法：
Two thirds of the work ____ been finished.(have)
Three quarters of the workers _____ women workers. (be)
has
are
Research & Interaction & Extension
百分数作主语，谓语动词的单复数怎么变呢？
The workers will complete the new bridge in ________.
A. two and a half months
B. two months and half
C. two and a half month
A
两个半月
two and a half months
two months and a half
Extension
It will take ________ time to finish the course.
A. one and a half years’
B. a year and a half
one and a half year’s
a year and half’s
A
一年半
one and a half years
one/a year and a half
【中考链接】
B
Feedback
1. Dick, it is the ________ time in ________ days that you’ve made the same mistake.
A. two, three B. second , three
C. two, third D. second, third
2. It is said that the gravity(引力) on Mars is only about __________ of the gravity on earth.
A. three－eighths B. third－eighth
C. three－eights D. third－eight
3. －How many people will come to Beijing next year
－It’s hard to say, ________ people, I think.
million of B. millions of
C. three millions D. three millions of
A
B
Feedback
There are seven days in a week and Thursday is the ______ (five) day of a week.
It was my grandmother’s _________ (seven)birthday yesterday.
Batman and Spiderman are _____ of the most famous American cartoons.
A. two B. the two C. second D. the second
Tony’s mum looks young and beautiful. It’s hard to imagine she is in her _____.
A. fifties B. fifty C. fiftieths D. fiftieth
This is the ____ time that I come to Paris. I have been here twice.
A. first B. second C. third D. fourth
fifth
B
seventieth
A
B
数词考查主要内容：
基数词的读写法和7种用法；
2. 序数词的读写法和3种用法；
3. 分数，小数，百分数表达法和用法。