2023中考复习数词课件(共32张PPT)

(共32张PPT)
数词
一、数词的分类
表示数目多少的词叫：_________
Most students exercise three or four times a week.
表示顺序的词叫：_________
Take the escalator to the second floor and turn right.
基数词
序数词
Two of them went out.
He chose the second.
The third person is his girlfriend.
What I want to get is the first.
Is there a room left for us two
主语
宾语
定语
表语
同位语
二、数词的句法功能
三、数词的构成和用法
100以内的基数词
1 one 11 eleven 20 twenty
2 two 12 twelve 30 thirty
3 three 13 thirteen 40 forty
4 four 14 fourteen 50 fifty
5 five 15 fifteen 60 sixty
6 six 16 sixteen 70 seventy
7 seven 17 seventeen 80 eighty
8 eight 18 eighteen 90 ninety
9 nine 19 nineteen
10 ten
三、数词的构成和用法
100以内的基数词
one hundred 一百
1,000 one thousand 一千
1,000,000 one million 一百万
1,000,000,000 one billion 十亿
十几的结尾是__________________________;
几十的结尾是__________________________;
两位数中间要有________________________;
三位数，百位十位间有_________; 十位个位间有________;
teen
ty
连字符-
and
连字符-
大数字
142，490，038，234
thousand
million
billion
How to read 849，003，495，349 in English
基数词的用法
five thousand
ten million
thirty billion
twenty hundred
thousands of
millions of
billions of
hundreds of
在表示一个具体的数目时，hundred, thousand, million后面都不能加-s。
在表示一个不确定的数目时，应用hundreds, thousands, millions加介词of来表示：数以百计/数以千计/数以百万计。
基数词的用法
Jim is a five-year-old boy.
He will take part in the boys’ 800-meter race.
基数词可以与名词构成复合词，相当于形容词，作定语。在这种复合词中，名词不能用复数。
序数词
基变序，有规律，结尾加上th
123，特殊记，结尾字母tdd
八去t，九去e，ve要用f替
整十变化需注意，把y变ie，结尾加上th
如果遇到几十几，只变个位就可以
序数词的用法
This is the first day at Beijing Sunshine School.
序数词前面一般要用定冠词the
2. She was born in Chongqing, but Chengdu has become her second hometown.
序数词前已有物主代词、指示代词或名词所有格修饰时，不能再用定冠词the。
四、常见表达法
1.时刻的表达
时刻 顺读法 逆读法
7：00
7：10
1：58
4：30
seven o’clock
-------
seven ten
ten past seven
one fifty-eight
two to two
four thirty
half past four
9:05
8:55
13:15
12:45
6:30
1. nine five 2. five past nine
1. eight fifty-five 2. five to nine
1. one fifteen 2. a quarter past one
1. twelve forty-five 2. a quarter to one
1. six thirty 2. half past six
2.日期表达—某年
读作:nineteen ninety
1900读作: nineteen hundred
2009读作: two thousand and nine
2000读作: two thousand
年份用基数词表示，通常把它分为两部分读。
2.日期表达—某年某月
March 2008 读作: March, two thousand and eight
某年某月的表达是月在前，年在后。
7月9日
月份+序数词
序数词+月份
写：July 9th
读：July the ninth
写：9th July
读：the ninth of July
2.日期表达—某月某日
2.日期表达—某年某月某日
1998年10月2日
写作October 2nd,1998 或者 2nd October, 1998
读作：October the second, nineteen ninety-eight
或 the second of October, nineteen ninety-eight
年、月、日同时出现时，可以表达为月日，年或日月，年。
3.编号表达
5号
名词+基数词
序数词+名词
Number Five/ Number 5
the fifth number
名词和数字的首字母要大写
the+ 序数词+名词
4.年龄表达
10岁
基数词+year（s）old
基数词-year-old
ten years old
ten-year-old
When he was in his thirties, he became a famous poet.
in one’s 基数词中整十数词的复数，表示在某人几十岁时。
The flying disk was invented by college students in the 1950s.
表达年代应用in the +带有整十的年份的复数或-’s形式，如in the 1990s/ in the 1990’s:在20世纪90年代
5.货币表达
9.80读作：nine yuan eighty fen 9元8角
7.37读作：seven pounds thirty-seven pence 7英镑37便士
$28.5读作：twenty-eight dollars fifty cents28美元50美分
货币表达通常是用符号加基数词
6.小数、分数和百分数表达
3.9读作：three point nine
2.15读作：two point one five
小数只能用基数词表达，其中小数点读作point， 零读作zero或o，小数点前的数与前面所讲的基数词的读法相同，小数点后的数要逐个读。
1/3读作one third
2/5读作two fifths
分数由基数词和序数词组成。分子用基数词，分母用序数词，分子大于1时，分母要在序数词后加s
6.小数、分数和百分数表达
1/5读作a（one）fifth
读作a half
当分子是1时，可以用one也可以用a；
当分母是2时，常用half；
当分母是4时，常用quarter
读作a quarter
读作three quarters
3读作three and one third
1读作one and two fifths
表示带分数时，应在分数之前加基数词和and
6.小数、分数和百分数表达
5%读作five percent
86%读作eighty-six percent
百分数是由“基数词+percent”表示的
7.倍数的表达
在英语中，表示倍数时，once表示一倍； twice表示两倍；
三倍或三倍以上用“基数词+times”。
Her house is twice bigger than yours.
This river is three times longer than that one.
倍数+形容词或副词的比较级+than…
7.倍数的表达
The box is three times as heavy as that one.
This table is twice as long as that one.
倍数+as+形容词或副词原形+as…
They spend three times as much on clothes as on education.
He has got three times as many books as his sister.
倍数+as+many/much…+as…
7.倍数的表达
7.倍数的表达
This room is three times the size of mine.
Their building is twice the height of ours.
倍数+the size /weight/height/length/age of…
7.倍数的表达
8.约数的表达
Then he leaves for school at around six thirty.
He is very tall, almost 1.8 meters.
表示“大约”常用about, nearly, almost, some, around等。
2. It is played by more than 100 million people in over 200 countries including China, where basketball has been played in parks, schools, and even factories.
表示“超过”，用over或more than
3. How often do you exercise Less than three times a week.
表示“少于”，用less than
8.约数的表达
4. Could you lend me your bike for an hour or so
表示“左右”，用or so.
9.算式的表达
3+5=8 Three plus/and five is/equals eight.
5-3=2 Five minus three is/equals two.
2 5=10 Two times/multiplies by five is/equals ten.
9 ÷ 3=3 Nine divided by three is/equals three.
加用plus或and
减用minus
乘用times或multiplies by
除用divided by
谓语动词用单数
Thank you