2023年冀教版中考英语二轮复习第二章　语法精讲 第三课时　数词 课件(共23张PPT)

(共23张PPT)
第三课时　数　词
第二章　语法精讲
考点分类
考点1　数词的定义与分类
　　数词是指表示数目多少或顺序先后的词。表示数目多少的数词叫基数词,如one,five,ten,thirty,sixty-five等;表示顺序先后的数词叫序数词,如first,sixth,tenth,twenty-first等。数词在句中可作主语、宾语、表语、定语、同位语等。
①In China there is a cycle of 　twelve　 (twelfth) years,each with a different animal.
②They have planted about five 　thousand　 (千)trees in and around the town in the past few years.
twelve　
thousand　
考点2　基数词
1.英语中没有“万”这个读数单位,要表示汉语中的“万”,需借用thousand一词,如“一万”用ten thousand表示,“十万”用one hundred thousand表示。
2.若表示具体的数目,hundred,thousand,
million,billion 通常不带复数词尾-s;但若表示数百、数千、数百万这样的泛指,则用复数,且与of连用。
eg:About two thousand people died in the earthquake.
大约有2000人在地震中丧生。
Thousands of people go to the seaside every year.
每年成千上万的人到海边去。
3.表示整十的基数词的复数形式可以表示人的大约岁数。
eg:He is in his early twenties.
他才二十出头。
（　C　）①More than nine 　 　　 　 students are doing sports now.
A.hundreds B.hundred of
C.hundred D.hundreds of
（　C　）②Yesterday 　 　　 　 people came to the town to watch the car race.
A.hundreds B.hundred
C.hundreds of D.hundred of
C
C
考点3　序数词
1.许多序数词是由相应的基数词后加词尾-th构成的,如four—fourth,six—sixth,ten—tenth,sixteen—sixteenth。
不规则变化:
one—first two—second
three—third five—fifth
eight—eighth nine—ninth
twelve—twelfth
2.twentieth,thirtieth,fortieth等表示整十的序数词,由相应的基数词将词尾的y变为ie,再加-th 构成。
3.first,second,third 通常可缩写为1st,2nd,3rd。以th结尾的序数词可缩写为“基数词＋th”,如4th,5th,9th,11th,60th等。
4.非整十的多位数变序数词时只需将个位数变成序数词即可,如twenty-first,thirty-sixth,ninety-ninth,three hundred and sixty-fifth等。
5.hundred,thousand,million的序数词为hundredth,thousandth,millionth。
6.序数词主要用作定语,前面通常要加定冠词,但表示考试或比赛等的名次时,通常可省略其前的定冠词。
eg:My room is on the second floor and his is on the third.
我的房间在二楼,他的房间在三楼。
He was third in the exam.
他考试得了第三名。
（　C　）①Today is the boy’s 　 　　 　 birthday.He is 12 years old.
A.twelve B.twelveth
C.twelfth D.the twelfth
②August is the 　eighth　 (eight) month of a year.
C
eighth　
考点4　数词的其他用法
1.分数
分数由基数词和序数词构成。分子用基数词,分母用序数词。分子是1时,分母用单数形式;分子大于1时,分母用复数形式。
eg:one half/a half 1/2
one fourth＝one/a quarter 1/4
three quarters＝three fourths 3/4
2.小数
整数与小数之间用小数点隔开。读小数时,每位数字(特别是小数点后面的)要单独读出。小数点读作point,零读作zero。如果整数是零,也可不读出。
eg:0.1读作(zero) point one
2.25读作two point two five
与小数连用的名词的数,当整数是零时,名词用单数形式,其他情况名词用复数形式。
eg:0.27 metre 0.27米
1.26 metres 1.26米
3.百分数
百分号读作percent。
eg:5% 读作five percent
4.时刻表达法
时刻有两种表达法:
(1)先说分钟,后说钟点。几点过几分,分钟不超过三十时用past;差几分几点,差的分钟数不超过三十时用to。
eg:five past seven 7:05
twenty-five to five 4:35
(2)先说钟点,后说分钟。
eg:six thirty6:30
5.half的用法
(1)“half a(an)＋名词”或“a half＋名词”表示“一半……”。
eg:half a kilo/a half kilo 500克
half an hour 半小时
(2)“一个半小时”的表达法:one hour and a half/one and a half hours。
6.数词与其他词的连用
(1)当序数词前有a/an修饰时,表示在原来的基础上“又一,再一”。
eg:Would you like to come to Beijing a
second time 你愿意再次来北京吗
(2)“基数词＋单数名词＋形容词”(两两之间用连字符连接)在句中作定语修饰名词。
eg:She is a five-year-old Chinese girl.
她是一个5岁的中国女孩。
①加油,孩子。我们已经做了三分之一的工作了。
Come on,baby.We have already done 　one　 　third　 of the work.
（　B　）②—Which is the biggest number of the four
— 　 　　 　 .
A.One third B.Two thirds
C.A half D.A quarter
one　
third　
B
备考演练
一、单项选择
（　A　）1.(2022·黑龙江牡丹江)The Great Wall is a symbol of China.It attracts 　 　　
travellers from all over the world to visit it.
A.millions of B.ten million of
C.ten millions
A
（　C　）2.(2022·黑龙江齐齐哈尔)In our city museum,there are many old things from
two 　 　　 　 years ago on show.
A.thousands B.thousands of
C.thousand
C
（　C　）3.(2022·黑龙江哈尔滨)Here is a survey about how to be a good learner among 400 students.According to the form below, 　 　　 　 students have chosen
“Learning from mistakes”as their key words.
Key words Making plans Taking notes Asking questions Learning
from
mistakes
Percentage (百分比) 20% 10% 30%
A.80 B.120 C.160
C
（　A　）4.(2022·湖南郴州)About 　 　　 　 of my classmates help their parents do housework on weekends.
A.two fifths B.second five
C.second fifths
（　B　）5.(2022·白银)I waited a quarter of an hour and went home.
A.10 minutes B.15 minutes
C.30 minutes D.45 minutes
（　B　）6.This Saturday is my 　 　　 　 birthday.
A.fourteen B.fourteenth
C.forty D.the fortieth
A
B
B
（　D　）7.(2022·江苏宿迁)—People in our town planted 　 　　 　 trees on Tree Planting Day.
—Good job!Everyone can do something to make our town greener.
A.hundred B.hundred of
C.hundreds D.hundreds of
（　B　）8.—Would you like to have 　 　　 　 apples
—No,thank you.I’ve had enough.
A.other two B.another two
C.more two D.two others
D
B
（　D　）9.Please turn to page 　 　　 　 and look at the 　 　　 　 picture in this unit.
A.twentieth;one B.twenty;one
C.twentieth;first D.twenty;first
（　B　）10.—Excuse me,sir.Here’s a package for Lin Tao.Which room does he live in
— 　 　　 　 .
A.308 Room B.Room 308
C.The Room 308 D.The 308 Room
D
B
二、用所给词的适当形式填空
1.(2022·广西贺州改编)October is the 　tenth　 (ten) month of a year.
2.(2022·黑龙江龙东地区)You’d better brush your teeth at least 　twice　 (two) a day.
3.(2022·江苏泰州)Beijing,the capital of China,is world’s 　first　 (one) city to
host Olympic Games twice.
4.(2022·辽宁盘锦)Look at the photo!The 　ninth　 (nine) boy from the right is my best friend.
5.(2022·山东泰安改编)There are 5 people waiting for testing in front of me.I am the 　sixth　 (six) one.
tenth　
twice　
first　
ninth　
sixth