高中英语语法综合复习全解课件：数词 (共40张PPT)

(共40张PPT)
教学辅助课件
高中语法综合
复习全解
P2-2
Numeral
Do the exercises individually, and then check your answers with your partners.
Now check your answers
1-4
DDDB
6-8
ACAC
数
词
基数词
序数词
数量
顺序
表示数目和顺序的词叫数词。
数词
点击欣赏
“数词之歌”
考点题例一
1. — If a = 4, b = 5, what’s the answer to
the question “a + 2ab + 1= ”
— _____.
A. Forty-fifth
B. Forty-five
C. Twenty-three
D. One hundred and twenty-one
【解析】基数词表示人或事物的数量，而序数词表示人或事物的次序。
2. — There are 60 students in my class
and 44 of them use we chat very often.
— 44 That means about _____ of
your classmates are we chat users, right
A. half B. one third
C. two thirds D. three quarters
【解析】表达分数时，分子用基数词，分母用序数词；分子大于1时，分母要在序数词后面加-s。在表达四分之几时，要用quarter与基数词搭配来表示(如：四分之三 three quarters)。表达二分之一时通常用one half或a half表示。
3. There are over _____ students in
their school.
A. hundreds B. nine hundreds
C. hundreds of D. nine hundred
【解析】当基数词与 hundred, thousand, million, billion 连用，表示具体的“几百、几千、几百万、几十亿”时，这些词后不加-s。如 two hundred books, three thousand trees, four million people, five billion seconds。
①1－12,独立成词。
one two three four five six seven eight nine ten eleven twelve
②13-19,由3－9 + teen构成。
14–fourteen 16–sixteen
17–seventeen 19–nineteen
特殊拼写:
13– thirteen 15–fifteen 18–eighteen
基数词的构成
③20－90,以-ty结尾。
20—twenty 30 —thirty
40—forty 50—fifty
60 —sixty 70 —seventy
80 —eighty 90—ninety
④21－99,两位数,十位与个位之间加“－”。
21 twenty—one 55 fifty—five
99 ninety—nine
⑤ 101—999，三位数，百位与十位/个位之间加and。
101 one hundred and one
840 eight hundred and forty
693 six hundred and ninety-three
⑥ 1，000以上数目,从右向左每三位用“，”
分开,分别读为thousand , million, billion 。
6
,
500
,
431
,
7
29
billion
million
thousand
hundred
and
基数词的用法
① 表示具体数目,hundred, thousand, million不用复数。表示不确定数目,用复数。即hundreds of(数百), thousands of(数千), millions of(数百万)+ 名词复数, 可以用many/several修饰，但不能与具体数目连用。
Our country has a population of 1,400 million people.
After the war, thousands of people became homeless.
②“几十”的复数形式可以表示：
几十多岁 — in + one’s + 数词复数
年 代 — in + the +数词复数
He died in his forties．
In the nineties, most people go to work by bike.
③“基数词+名词” 的合成形容词作定语, 中间有连字符“－”,当中的名词用单数。
a 3 – year – old girl a seven-day holiday
④表计量— “基数词+度量单位+形容词”
The classroom is 7 meters long, 6 meters wide and 3 meters high.
⑤ 表示时刻 (介词用at)
1)顺读法—先时后分,“几点几分”
9:30 nine thirty
6:21 six twenty-one
2)逆读法—先分后时　
a. 表示“几点过几分”,半小时以内, 介词用past, 分钟数+past +钟点数。
10:10 ten past ten
8:20 twenty past eight
b. 表示“几点差几分”, 半小时以上, 介词用 to, 60减原分钟+ to + (下一个)钟点数。
9:50 ten to ten
7:40 twenty to eight
c.15分钟：a quarter 30分钟：a half
9:15 a quarter past nine
12:30 half past twelve
举一反三
1.After the Asian Games, _____ people
came to Guangzhou for a visit during
holidays.
A. thousand B. thousands of
C. five thousands D. thousand of
2.My brother was born in _____, when my grandfather was in _____.
A. the eighties; his eighty B. eighties; his eighties
C. the eighties; his eighties D. eighty; eighty
3.— It’s said that a new factory is being
built now.
— Yeah. It will take _____.
A. one and half years
B. a half and a year
C. a year and half
D. one and a half years
考点题例二
1. — May I sit here
— Sorry. _____ rows are reserved for
special guests.
A. First three B. The three first
C. The first three D. Three first
2. It is reported that the United States
uses _____ energy as the whole of
Europe.
A. as twice B. twice much
C. twice much as D. twice as much
① 1－3, first, second, third 。
② 4－19, 相应基数词+th,
特殊拼写:
fifth, eighth, ninth, twelfth。
③ 20－90, y变成ie +th,如twentieth。
④ 21－99, 只把个位的基数词变成序数词，如twenty-first。
⑤ 序数词缩写—数字＋最后两字母，
如 1st, 2nd, 3rd ,4th…
序数词的构成
基变序,有规律,
一、二、三，特殊记，面目全非要注意，
加th从4起，
八少“t”，九去“e”，
“ve”要用“f”替，(five, twelve)
见“y”变成“i”和“e”，词尾加上“th”，
(twenty, thirty,……ninety)
若是遇到几十几，只变个位就可以。
序数词缩写记清楚,数字后跟两字母。
序数词构成规律
① 序数词作定语，前面要加the；
The first truck is carrying a food basket．
John lives on the fifteenth floor．
②有时加a/an，“再一”，“又一” 的意思。
We’ ll have to do it a second time．
Shall I ask him a third time？
They had a second child in 1988.
序数词的用法
分子用基数词，分母用序数词。
分子大于1时，分母加-s。
1/4 one-fourth a (one) quarter
3/4 three-fourths three quarters
2/3 two-thirds 1/2 a (one) half
半年 half a year 半小时 half an hour
一年半 one and a half years
one year and a half
分数表示法
编号在前，名词在后，用序数词，前面有the
编号在后，名词在前，用基数词，注意首字母大写
房间号码和电话号码要一个一个分别读。
第一课 The First Lesson（在句子中不大写）
Lesson One
第32页 the thirty-second page
Page 32 / Page Thirty-two
第305房间 Room 305
第12路公共汽车 Bus No.12
编号表示法
年用基数词表示,两位一读,介词用in；
日用序数词表示,介词用on。
1999 nineteen ninety-nine
1949年10月1日
October (the) first, nineteen forty-nine
（月-日, 年）
the first of October, nineteen forty-nine
（日-月, 年）
年份、日期表达法
读作
表示“在…世纪”, 用序数词。
在20世纪
写作：in 20th century
读作：in the twentieth century
1) 用… times表示。
My room is three times as large as yours.
　我的房间是你的三倍大小。
　如果表示“是……两倍数”,一般用 twice。
My room is twice as large as yours.
我的房间是你的两倍大小。
倍数表达法的句型：
......倍数 + as + 形容词原级或副词原级 + as
倍数的表达法
2) 用-fold表示。
　The value of the stock has increased two-
fold since we bought it.
　股票的价值已涨至我们购买时候的两倍。 　　
3) 用-%表示。
　The collection of our school library is
200% up compared with 1998.
　我们学校图书馆藏书量与1998年相比增
长了一倍。
first of all 首先
by ones and twos 三三两两地
second to none
不比任何人差，首屈一指的
one by one 一个一个地
be on cloud nine 高兴得飘飘然
含数词的短语你知道哪些呢？
举一反三
1. There are 50 students in our class, _____
of whom have been to the Great Wall.
A. two-three B. two-third
C. two-thirds D. second-three
2. _____ of the land in that district
_____ covered with trees and grass.
A. Two fifth, is B. Two fifth, are
C. Two fifths, is D. Two fifths, are
3.Americans eat _____ vegetables per
person today as they did in 1990s.
A. more than twice
B. as twice as many
C. twice as many as
D. more than twice as many
1. _____ people in the world are
sending information by E-mail every
day.
A. Several million
B. Many millions
C. Several millions
D. Many million
I. Multiple choice.
2. Many students signed up for the
_____ race in the sports meeting to be
held next week.
A. 800-meter-long
B. 800-meters-long
C. 800 meter length
D. 800 meters length
3. It is reported that the floods have left about _____ people homeless.
A. two thousand
B. two-thousands
C. two thousands
D. two thousands of
II. Fill in the blanks with the suitable words.
1. Efforts to reform the system began in
the early _________ (twenty) century
and met with some success in the
decades that followed.
2. — The boss said we had only three
days to finish the work.
— Don't worry. We have already got
through two ______ (three) of it.
thirds
twentieth
3. The ________ (twelve) man in a
football team will play if one of the
other players is ill.
4. The study stated that two _____ (five)
of the kids, from the kindergartners
to eighth-graders, had excess weight
on them.
5. _________ (hundred) of people were taken to the streets to protest against the brutalities.
twelfth
fifths
Hundreds
III. Translation.
1. 地球是月球的50倍大。　
The earth is about fifty times as big
as the moon.
2. 这所大学十分之三的学生来自南方。　
Three students out of ten in this
university come from the south.
3. 那个男孩买了几十支铅笔。　
The boy bought dozens of pencils.
4. 他30多岁时去了美国。　
He went to America in his thirties.
5. 我得先把作业完成好。
I have to finish my homework first.
Thank you!