2022年中考英语二轮复习数词课件13张

(共13张PPT)
数词
2022中考英语复习
数词
表示数目和顺序的词叫数词。数词又分基数词和序数词，
基数词表示数量，序数词表示顺序。
100以内的基数词如下表所示：
1~10 11~19 20~100
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 100 one hundred
10 ten
1. 0~12各独立
例：zero 0;nine 9;twelve12
1.基数词
2.13~19以-teen 结尾
例：一般∶fourteen 14;sixteen 16
特殊∶thirteen 13;fifteen 15;eighteen 18
3.20~90整位数以-ty 结尾
例：twenty 20;thirty 30;forty40;fifty 50;eighty 80
4.两位数（几十几）：整十数+个位数
例：thirty-five 35
5.三位数（几百几十几）：...hundred+and+两位数
例：six hundred and sixty-six 666
6.多位数：从右向左数起，每隔三位数加一个逗号，逗号前依次读作 thousand（千）、million（百万）、billion（十亿），逗号中间按三位数读
【考点注意】
thousands of
百、千、百万、十亿的考点
1. hundred\thousand\ million\billion前有数字不加
2. 用作名词时复数表示“成…上…”,后面必须要有
如:五百 成百上千的
s
s+of
five hundred
基数词不难记,找清规律很容易,
十二以内词各异,十三数到十九,teen莫忘记；
二十、三十……至九十,尾巴要加ty；
要说“几十几”,中间“-”别丢弃；
若说几百几十几,百位十位用and；
以上用法要记住,用时千万莫大意。
【100以内的基数词巧学妙记】
1）一般来说，是由相应的基数词加词尾th构成。
2）下面这些基数词在变为序数词时，有特殊的变化。
one --- first two --- second three --- third five--- fifth
eight --- eighth nine --- ninth twelve --- twelfth
3）十位整数序数词的构成方法是将基数词的词y 变成i，然后在加eth.
twenty --- twentieth thirty --- thirtieth
forty --- fortieth ninety --- ninetieth
4）两位或两位以上的基数词变为序数词时，仅将个位数变成序数词。
twenty –one ------ twenty- first thirty-five ------thirty-fifth
a hundred and fifty-three -- a hundred and fifty- third
2．序数词
一二三特殊记，结尾各是t,d,d,th从四起；
八去t,九去e,f来把ve替；遇到y变ie ；
若是遇到几十几，只变个位就可以。
【序数词巧学妙记】
(1)序数词前要加定冠词the,若序数词前有形容词性物主代词或名词所有格时省略the。 例Bill is my first pen pal. 比尔是我的第一个笔友。
(2)序数词前加a/an表示“又一,再一”。
Even though the Browns have three children,they still want
a fourth one.尽管布朗夫妇已有三个孩子,可他们还想再要一个。
【考点注意】
Two thirds of her money was spent on clothes.
3. 分数
a quarter
three quarters
a half
one sixth
three fourths
four fifths
例：1/6 3/4 4/5
1.分数的表达: 【记忆口诀】”子基母序，子>1母加s。“
英语中常见表达：1/4 ;3/4 ;1/2 。
2.分数的用法
“分数+of+限定词+名词复数”作主语时,谓语动词应用复数形式;
“分数+of+限定词+不可数名词/名词单数”作主语时,谓语动词常用单数形式。
例1： 4/5的男孩子喜欢车。
Four fifths of the boys like cars.
例2：她把2/3的钱花在了衣服上。
3. 次数
一次 两次 三次
once
twice
three times
4.倍数
两倍 三倍 as...as..
twice
three times
和....一样
例：He is his younger sister.(他和他妹妹一样兴奋)
This room is that one(这个房间跟那个房间的两倍大）
twice as big as
as excited as
5.the+序数词与a +序数词的区别
the +序数词 意思为
第几
a +序数词 意思为
再一次
例：John failed the test twice.But he would like to have try.
约翰考试失败了两次，他想再试一次。
Hainan is island in China.
海南是中国的第二大岛。
a third
the second
1. 表示年份： 例:2022 twenty twenty-two
2. 表示日期： 例:2021年11月8日: Nov. 8th, 2021
3. 表示时刻： 例:5:15→ five fifteen或a quarter past five ;
8:30→ eight thirty或half past eight ;
10:45→ ten forty-five或a quarter to eleven.
4. 表示编号： 例:Room 105
5. 年代的表达方式通常为“in+the+数词的复数”。
例：在20世纪80年代 in the 1980s
6.“半”的表达：1/2 半小时
1.5小时 .
7. 在我30多岁时 .
数词的用法
a half
half an hour
one hour and a half
in my thirties
Mr.Green is teacher in a middle school.In his (三十多岁),he went to Russia.
He has lived Russia for about (一年半). In the school,
of(总数) students about (两千).And about
(五分之三)students are boys. (许多)boys like playing basketball.Tom is a (十六岁的) student comes from (
三年级四班).He often plays basketball (一周两次). Once The (
第二十届) World Basketball Championship began the morning of May 25, 2010
Moscow, Russia.there were (成千上万)people watching the game. But Tom didn’t go to watch because he had to stay in (406室) with his
classmates to study English.
数词在语篇中的运用
thirties
one and a half years
the number
is
two thousand
three fifths
A number of
sixteen-year-old
Class Three Grade Four
twice a week
twentieth
on
in
thousands of
Room 406
Thank you!!