数词复习Number
中考英语总复习
学习目标
1、知道数词的分类及用法
2、掌握基数词的形式及读法
3、掌握序数词的形式
4、掌握分数、小数、百分数读法
5、高频考点详解
1、知道数词的分类及用法
1.分类：

2.基数词用法：表示事物数量的多少。如：one, two, four hundred, …
3.序数词用法：表示事物排列先后的顺序（第几）如：first, second, twentieth, twenty-first. 在使用序数词时通常前面要加the;但如果序数词前出现不定冠词a、an时则表示“又一再一”
数词
基数词
序数词
分数
小数
百分数
2、掌握基数词的形式及读法
（1）0-12为基数词，有其各自的形式，是构成数词的重要部分。如：seven，eight，nine，ten，eleven，twelve
（2）13-19都以-teen结尾，单词中的两个音节都是重读音。如： thirteen，fourteen，fifteen，sixteen，seventeen，eighteen， nineteen
（3）20-90十位数的整数都以-ty结尾；21-99在十位与各位之间加连字符号“-”。如：twenty-one，seventy-six
(4)三位数数词: 百位和十位(若无十位则和个位)之间用and连接,十位和个位间用“-” 连接。如：861 eight hundred and sixty-one; 204 two hundred and four
(5) 1,000以上的数字,从右往左数,三位一组,每三位数加一逗号“,”;第一个“,”号前为thousand(千), 第二个“,”号前为million(百万),第三个“,”号前为billion(十亿) 。如:
万以上的数字读法特点
6, 500, 431, 729
hundred
thousand
million
billion
注意每三个数为一个单位，按照百、
十、个向下读。
6，500，431，729
seven hundred and twenty-nine
thousand
million
billion
six billion,
five hundred million,
four hundred and thirty-one thousand,
hundred
3、序数词的形式
one two three five eight nine twelve
first second third fifth eighth ninth twelfth
1st 2nd 3rd 5th 8th 9th 12th
twenty twenty-one one hundred two hundred and thirty-nine
twentieth twenty-first one hundredth two hundred and thirty-ninth
基数词
基数词
序数词
序数词
缩略
基变序顺口溜
基变序,有规律, 词尾加上th。
123, 特殊记, 词尾字母t,d,d;
8去t, 9去e, f来把ve替；
整十y换ie, 若是遇到几十几，
只把个位变成序，各位牢记别忘记。
4、分数，小数，百分数
分数：由基数词和序数词合成。分子是1时，分子用基数词，分母用序数词；分子不是1时，分子仍用基数词，分母用序数词的复数形式。如： 7/8 seven eighths。
注意几个常见表达法：1/2 a (one) half
1/4 one-fourth a (one) quarter 3/4 three fourths three quarters 半年 half a year
一年半 one and a half years one year and a half
小数：小数点读point，零读o或zero，小数点后的数字按个位基数词依次读出。0.6 zero point six
百分数：百分数由基数词加percent表示。 不论基数词是多少，percent始终用原形。如:0.8%, 读作zero point eight percent；17%读作seventeen percent
五、高频考点之一——hundred, thousand, million,billion
这几个词前有确切数词时， 遵循“两个无”原则，即无 “s”，无“of”；如：three hundred people ，nine million books
但是一定注意：如后面是表示总体的人或物，前面的数词是表示总体中的一部分时，要用of。如：seven hundred of the workers
这几个词前无确切数词时，则遵循“两个有”原则，即有 “s”和“of”。
如: many thousands of trees, millions of birds
1. (2004年河北省中考试题) Nine _______ pounds a week? That’s very good.
A. hundred of B. hundreds of
C. hundreds D. hundred
D
3. of the students are girls.
A.Three hundred B.Three hundred of
C.Three hundred D.Three hundreds of
B
2. (2012年苏州中考试题)The chairperson received about three applications to join the Blind Watching Club.
A. hundred B. hundreds of
C.hundred of D.hundreds
A
五、高频考点之二—— 基数词+名词（+形容词）
1.“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。如： a seven-day holiday， a five-star hotel, a 3-day trip, an 800-word composition
2.“基数词+名词+形容词”，主要表计量，在名词前做定语时，名词用单数，词中间用连词符号 “-”；如：an 18-year-old girl, women's 800­metre race， an 80­metre­long bridg
注意：在联系动词后作表语时，名词用复数，不用连词符。如：The classroom is 7 meters long, 6 meters wide and 3 meters high.
1.(2011连云港中考试题)--How amazing the noodle is! --Yes,it is _______, and breaks the Guinness World Rocord as the longest handmade noodle.
A. 1704-meter-long B. 1704-meters-long
C. 1704 meter long D. 1704 meters long
D
2. (2012江苏中考试题) He is only boy. He isn't old enough to take care of himself.
A. a 8-year-old B. a 8-years-old
C. an 8-year-old D.an 8-years-old
C
1．倍数：表示“一倍”once；表示“两倍”twice；表示“三倍”或“三倍以上”的倍数用times。如: 三倍 three times; 常用句型：
(1)... 数词+times＋形容词(副词)比较级＋than...
如：The car runs twice faster than that truck.
(2)...数词+ times＋as＋形容词或副词原级＋as...
如:The big box is six times as heavy as the small one.
(3)...数词+ times＋the＋名词（size, height, weight, length, width）＋of /从句.如：The earth is 49 times the size of the moon. This street is four times the length of that one.
2. 分数：“分数(包括百分数)＋名词”做主语时，谓语动词的单复数取决于名词，名词为复数，动词用复数；名词为单数或者不可数名词，动词用单数。如：
Two thirds of the buildings are tallers than before.
五、高频考点之三——倍数和分数
1.(2010兰州中考试题)I think ____ of the materials I listened to at the beginning of the exam ____ easy.
A. three fourths, is B. third four, are
C. three fourths, are D. three fourth, are
D
2.(2012杭州中考试题)We have two ears and one mouth so that we listen we speak.
A. as twice much as B. twice as much as
C. as much as twice D. as much twice as
B
2.(2011青海中考试题) of the sand in that district covered with trees and grass.
A. Two fifths, are B. Two fifth are
C. Two fifth, is D. Two fifths, is
D
五、高频考点之四——
1. 编号表示法：（1）编号在前，名词在后，用序数词，前面有the;（2）编号在后，名词在前，用基数词，注意首字母大写;（3）房间号码和电话号码要一个一个分别读。如：第一课 The First Lesson(句中不大写),Lesson One; Room 305
2. “几十”的复数形式可以表示：(1)几十多岁 ---- in + one’s + 数词复数(in his forties2)年 代--- in + the +数词复数in the nineties
3.时刻表示法：(1)顺读法, (2)逆读法, (3)a quarter与half
4.“每隔“的两种结构：(1)every+基数词＋复数名词 (2)every + 序数词＋单数名词。如：每隔三天（每四天）every four days或 every fourth day
5.“another＋基数词＋名词的复数”或者“基数词＋more＋名词”表示在一定基础上再增加一定的数量。如：two more boys ＝ another two boys。
6. 基数词和序数词的基本用法

1.(2012铜仁中考试题)About of the students in Grade Nine were born in the .
A. three five;1996 B. three fifths;1990s
C. three fifth;1997 D. third fifths;1990s
B
2.(2012自贡中考试题)---I hear your friend is visiting Sanya again,Is it the second time for him? ---Yes, and he will come for time next spring.
A. a third B. a second C. the third
3.(2011达州中考试题)---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
A
B
Thank you
for your listening!
Bye-bye!