人教版九年级下册 Unit14I remember meeting all of you in Grade 7. 数词复习课件(共24张PPT)

(共24张PPT)
基数词 序数词 基数词 序数词
one twelve
two twenty
three twenty-one
four forty
five one hundred
six one hundred and five
eight one hundred and twenty-nine
nine nineteen
一.基数词、序数词
first
second
third
fourth
fifth
sixth
eighth
ninth
twelfth
twentieth
twenty-first
fortieth
one hundredth
one hundred and fifth
one hundred and twenty-ninth
nineteenth
基数词变序数词的口诀
基变序，有规律；词尾加上th；
一二三，特殊记; first, second和third;
八减t, 九去e；f要把ve替; ie要把y来替；
若是遇到几十几；只变个位就可以。
(1)序数词作定语，前面要加the；
John lives on the fifteenth floor．
She is my first English teacher.
(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？
序数词的用法
二.基数词的读法
1、百位和十位间用 and 连接,
十位和个位间用 - 连接
three hundred and twenty-one
321
2、右往左数,三位一组,逗号隔开.依次是
thousand(千)
million(百万)
billion(十亿)
29
,
431
500
7
6
,
,
thousand
hundred
million
billion
and
1. hundred
thousand (表示具体数字)
million
billion
2. hundreds
thousands (表示概数)
millions
billions
三.基数词的用法
数词
(several)+
+ of
some / many hundreds of
1. __ sheep were killed in the accident.
A. Thousands of B. Thousand
C. Thousands
2. There are over nine __ workers in the factory, but __ of young people hope to work in it.
A. hundred; hundreds
B. hundreds; hundreds
C. hundreds; hundred
① 月日年 在2008年10月1日
四.数词的表示法 — 年月日
on Octorber the first, two thousand and eight
日
序数词
月
（首字母大写）
月日与年之间用 ，分开
年
（两位两位读）
on August the ninth
in May, two thousand and ten
有日用 on 无日用in
on Oct. 1st , 2008
② 月日 在8月9日
③ 月年 在2010年5月
1. The accident happened on___.
A. April 5, 2001
B. 2001, April 5
C. April 2001, 5
2. I was born ___.
A. in March 8, 1993
B. on July 9, 1994
C. on May, 1995
20世纪90年代
in the 1990s
在他50多岁时
in his fifties
四.数词的表示法 — 年代世纪
in the
in one’s + 整十基数词复数
在某人几十岁时
nineteen
nineties
表示“在…世纪”, 用序数词。
在20世纪 ：in the twentieth century
1. There will be more chances in __ century than in __ century.
A. twenty-one, twenty
B. twenty-first, twentieth
C. the twenty-first, the twentieth
2. The city changed a lot ___.
A. in 1980s
B. in the 1980s
C. in the 1980
时间类型 表示法 例 读法
整点 基数词（+ o’clock) 1:00
﹤30分钟 分钟 + past +小时 2:10
= 30 分钟 half + past + 小时 3:30
﹥30分钟 （60-分钟） + to +（小时 + 1） 4:40
分钟逢15
即 一刻钟 a quarter 5:15
6:45
简化法 按顺序读基数词 7:50
one o’clock
ten past two
half past three
twenty to five
a quarter past five
a quarter to seven
seven fifty
表示在几点钟用介词 at
四.数词的表示法 — 时间
1
5
分子 基数词
分母 序数词
one fifth
2
7
分子 ﹥ 1
分母 + s
two sevenths
1
4
分子 a
分母 quarter
a quarter
3
4
three quarters
1
2
a half
四.数词的表示法 — 分数,百分数，小数
80 %
基数词 + percent
eighty percent
(百)分数 + of + 可数名词复数
谓语动词用复数
(百)分数 + of + 可数名词单/数不可数名词
谓语动词用单数
3.78
three point seven eight
1. __ of the students __ boys in Class
A. Two three; are B. Two thirds; are
C. Two thirds; is
2. __ of her money __ spent on clothes.
A. Two three; are B. Two thirds; is
C. Two third; is
3. __ the teachers in our school is about one hundred, and __ of them are women teachers.
A. The number of; two third
B. The number of ; two thirds
C. A number of; two thirds
一个半小时
两个半小时
two and a half hours
= two hours and a half
one and a half hours
= one hour and a half
四.数词的表示法 — 半的表示法
1. The boy always stays there for __.
A. one and half hour
B. one and a half hour
C. one and a half hours
2. The old man drank__ beer.
A. two bottles and a half
B. two and a half bottle
C. two bottle and a half
一般编码用 名词 + 基数词
207房
三年级一班
第一课
第一中学
Room 207
Class one Grade three
Lesson One = the first lesson
No. 1 Middle School
四.数词的表示法 — 编号
① The winner is ___. He is an ___ boy .
A. eight-year-old; eight years old
B. eight years old; eight-year-old
C. eight-years old; eight-year-old
② He came to China ____.
A. at the age of 20
B. when he is 20
C. at age of 20
四.数词的表示法 — 年龄
一倍 once，两倍 twice，
三倍 three times (三倍或以上 基数词＋times)
数词的表示法 — 倍数
This box is five times as big as that one.
=This box is four times bigger than that one.
① A + be + 倍数 + as +adj.原+ as +B.
A是B的 …倍…
② C + be + 倍数 + adj.比+ than +D.
C比D … …倍
① The river is about ____.
A. 6,000 meters long
B. 6,000-meters-long
C. 6,000-meter-long
四.数词的表示法 — 计量
be + 数词 + 量词 + 形容词
表示“大约、接近”，常用nearly, about, some, almost, around 等。
about 700 people
表示“左右”用or so
In the past five years or so
“少于”用less than
Less than 30 years old 不到30岁
“多于”用 more than , over
More than a year ago over 70 years ago
约数表示法
Summary(小结)
1.基数词的构成
2.序数词的构成（记歌谣）
3.基数词的用法(hundred, thousand,million、岁数与
年代、计量、时刻）
4.序数词的用法(加the, a/an)
5.编号表示法(可用序数词/基数词,注意加the或大写)
6.分数，百分数，小数表示法
7.年份、日期、的表达法(年:基数 日、世纪:序数)