中考 二轮专题 词法复习课件 数词

课件32张PPT。数词Welcome to our class!数词基数词序数词（表示数目多少）（表示顺序先后）基数词 A．从1——10　one，two，three，four，five，six，seven，eight，nine，ten． 　　B．从 11——19　eleven，twelve， thirteen， fourteen， fifteen， sixteen， seventeen，eighteen， nineteen．　　这里除 eleven， twelve， thirteen， fifteen， eighteen为特殊形式外，fourteen，sixteen，seventeen，nineteen都是由其个位数形式后添加后缀-teen构成。 　　C．从 21——99整数几十中除twenty，thirty, forty，fifty，eighty为特殊形式外，sixty，seventy，ninety都是其个位数形式后添加后缀-ty构成。表示几十几时，在几十和个位基数词形式之间添加连字符“-” 21 twenty-one 76 seventy-six D．百位数　　百位与十位之间加上and．　　　　　　101 a hundred and one　　　　　　320 three hundred and twenty　　　　　　648 six hundred and forty-eight　　E．千位数以上　　从数字的右端向左端数起，每三位数加一个逗号“，”。从右开始，第一个“，”前的数字后添加 thousand，第二个“，”前面的数字后添加 million，第三个“，”前的数字后添加 billion。然后一节一节分别表示，两个逗号之间最大的数为百位数形式。　　2,648 two thousand six hundred and forty-eight　　16,250,064 sixteen million two hundred and fifty thousand sixty-four　　5,237,166,234 five billion，two hundred and thirty-seven million，one hundred and sixty-six thousand，two hundred and thirty-four　　F．前面有确切的数字时，不能使用百、千、百万、十亿的复数形式；但是，表示不确定的“数百”，“数百万”，“数千”，“数十亿”时，用“hundreds”，“thousands”，“millions”，“billions”加“of”构成。 　
　There are four hundred people in the hall.
大厅里有四百人。
There are hundreds of people in the hall．　　大厅里有数以百计的人。　　　They went to the cinema in twos and threes．　　他们三三两两地来到了电影院。 　　G．表示人的不确切岁数或年代，用几十的复数形式表示。 　　He became a professor in his thirties．　　他三十多岁时成为了教授。 It was in the 1960s．　　那是在二十世纪六十年代。　　序数词　　　 基数词变为序数词口诀：一二三特殊记，
th从四加起，
八减t，九减e，
f来把ve替，
ty改为tie，
如果遇到几十几，
只改个位就可以。1）倍数表示法　 主语+谓语+倍数（或分数）+ as + adj. + as　I have three times as many as you.　
我有你三倍那么多。
主语+谓语+倍数+比较级+than
This room is three times bigger than that one．　　这个房间比那个（房间）大三倍。
My age is three times older than his．　　我的年龄比他大三倍。 数词的实际运用2）分数表示法：　构成：分子基数词，分母序数词，分子大于1，分母加s。 　 1/3 one-third ； 1/2 one half
3/4 three fourths 或 three quarters
3)小数：
小数点读point, 0 读O或zero, 小数点后的数字按个位基数词依次读出即可。
0.5 zero point five, 3.145 three point one four five
4) 百分数：
百分数由 基数词+percent 来表示。
3% three percent 56% fifty-six per cent
5)数字运算
1＋2=3 One plus/and two is three.
5－4=1 Five minus four is one.
2×3 =6 Two times three is six.
8÷4=2 Eight divided by four is two.
6）年、月、日的表示法
1990 nineteen ninety
2008 two thousand and eight
20世纪90年代 1990s 读成 nineteen nineties
7月1日 July 1st 读成July the first
the first of July
2005年5月4日 May 4th, 20057）时刻表示法：two to two 1:588)“几个半” 表达法数词＋and a half＋名词复数
=数词＋名词（复数）＋and a half 如：
three and a half days
three days and a half
one and a half apples
one apple and a half9)表示次数一次
两次
三次
四次
每隔多久一次
　“every+基数词+名词复数”
如：每四年一次 once twice three times four times every four years注意事项
1）英语中表示基数单位的数词有：百( hundred ) ，千( thousand )，百万( million )，十亿( billion )，但没有万，十万，亿，要注意它们的表示法：
一百 (100) a hundred
一千 (1,000) a thousand
一万 (10,000) ten thousand
十万 (100,000) a hundred thousand
一百万 (1,000,000) a million (= a thousand thousand)
一千万 (10,000,000) ten million
一亿 (100,000,000) a hundred million
十亿 (1,000,000,000) a billion (= a thousand million)2) hundred, thousand, million等表示基数单词的词前面有基数词，用来修饰后面的名词表示精确数量时，本身不用复数形式，名词才用复数形式．
如：两千人 two thousand people
　　三百米 three hundred meters
但在表示含糊数量时要用复数形式，并要与of 连用，构成hundreds of（数百的）, thousands of（数千的或成千上万的）, millions of （数百万的）
如： 数千人　thousands of people3) 序数词在使用时，一般在其前面加定冠词the，但其前有物主代词或所有格等限定词时，不用定冠词the．
如：the first time 第一次
　 his second son　他的第二个儿子
　如果序数词前加定冠词a/an，则表示“又一，再一”．
如：I’ve tried twice. And I want a third try.
4) 分数作主语时，谓语动词要根据分数后的名词来确定，如果不可数名词就要用单数，是可数名词则用复数．
如：One third of the students in our class have been to the Great Wall.
Four fifths of the water is drunk by the children.5）由数词和其他名词构成的复合形容词作定语时，其中的名词用单数形式，复合形容词中各部分间要用连字符“-”来连接。 　　It's a five-minute walk from the library to the playground．　　从图书馆到操场需要走五分钟。 　　She's a sixteen-year- old girl．　　她是个十六岁的女孩。 Practice：1.There are fifty ______people in this town.
A. thousand B. thousands
C. thousand of D.thousands of2.Look! There are _____in the sky.
A. thousand stars
B. thousands stars
C. thousands of stars
D. thousands of star
3.___________ (五分之三) of the students in our class are girls.
４.Where are they going to have the meeting? In____.
A. 204 Room B. Room 204
C. the room 204 D. the Room 204 Three fifths5. What’s the date today?
It’s __________.(七月五日)
６. He began to learn Chinese in his _______.(五十多岁)
7.She has a ______________ baby.(十个月大的)
8. Please give us_________________(三瓶水).July 5th fifties ten-month-old three bottles of water. ９.There are ______ seasons in a year. The ______season is spring.
10. 4:25___________________________
11. Mr. Brown lives on _________ floor.(五楼)
12. 236 four firsttwenty-five past four the fifth two hundred and thirty-six1. We have ________(数百)of books about science in the library.
2. September is the _______(第九) month of the year.
3. Half an hour is ________(三十) minutes.
4. This mobile phone cost me two _________(千) yuan.
5. There are _______(十二) months in a year.
6. The ________(第十二) lesson is very hard.hundredsninththirtythousandtwelvetwelfth细心练习：1. My father has got eight _____stamps from all over the world.
A. hundreds B. hundred C. hundreds of
2. The concert attracted ____ students last night.
A. thousand B. two thousands
C. thousands of BC1：基数词hundred; thousand; million; billion等, 与确切数目连用时,词尾不加“s”；与“of”连用时用复数形式．
边练边总结1.The children are going to learn ____ tomorrow.
Lesson Third B. the Lesson three C. Lesson Three
2. I don’t know if he lives in ________.
A. Room 205 B. the Room 205 C. 205 roomsCA2：数词与名词连用时，如几号，几班，几年级，房间号及邮编号码时，首字母都大写。 Page15, Bus No.37,
Lesson Two = the second lesson,
Room 201, Class Five, Grade Three3：时间表达法：　1. -What’s the English for “6:10”? –It’s ______.
A. six ten B. ten six C. ten to six
2. 9:45 is _______.
A. a quarter to nine B. a quarter past nine
C. a quarter to ten AC２：１５two fifteen顺读法　　　逆读法a quarter past two５：３０five thirtyhalf past five８：５０eight fiftyten to nine4：基数词与单数名词构成复合形容词．例： an eight-year-old boy 一个八岁的男孩 a two-day holiday　　　一个两天的假期1. A _____schoolboy, Li Ming, played the piano at the end of the party.
A. 12-year old B. 12-years-old
C. 12-year-old
2. Every morning Mr. Smith takes a ____to his office.
A. 20 minutes walk B. 20 minute’s walk
C. 20-minute walkCCJohn lives on _______ floor.
A. nine B. ninth C. the ninth
2. We all think that the _____century will bring us more hopes.
twenty-one B. twentieth-first C. twenty-first
3. This is _____ visit to China.
A. second B. my the second C. my second
4. On his ____ birthday, he got a lot of presents.
A. twelve B. twelfth C. the twelfthCCCB5：序数词前要有定冠词the，如前有形容词性物主代词时，就不用定冠词.6：序数词前用不定冠词a/an时表示“再一，又一”，相当于another.1. I have already broken three rulers so I want to buy a ____ one.
A. three B. third C. fourth
2. 为什么不再试一次？CWhy not try a second time?7：分数表达法:例: one third(1/3); two-fifths(2/5);
three quarters three fourths(3/4); In our class, _____of the students ____ girls.
A. three fifths, are B. three fifth, are
C. three five, are
2. ____of the water ____drunk up.
A. Two thirds, has B. Two third, is
C. Two thirds, isAC基数词 - 序数词. 当分子大于1时,序数词之后加“s”.　谓语动词的数由分数后面的名词决定．1．There are?_________________________ （365）days in a year． 2．Look！There are __________ （成千上万的） stars in the sky．3． ______________ （2/3）of the students are girls in our class． 4．September is the __________??month of the year．5．There are forty-six students in Class _______ （三班）．6．December is the??_________ and last month of the year． 7． There are??_________ students in our class， twenty boys and twenty girls．
8． Our teacher often tells us that work must come _____(第一)??． 9． At the beginning of the ___________ （twenty） century，the world's population was about 1， 700 million． 补充练习：用数词填空。three hundred and sixty-fivethousands ofTwo thirdsninthThreetwelfthfortyfirsttwentieth1.现在是十二点一刻. ____________________________
2.第一个比第二个好. ____________________________________
3.五月二十一日是王平的生日. ____________________________
4. 麦克收集了五百多张中国邮票.
_________________________________________________
5. 这座桥有二百米长. ___________________________________
6. 数以百计的人在等车.
_____________________________________________
7. 这所学校五分之三的教师是青年教师.
_______________________________________________________
9. 从我家走路到滨湖公园只有五分钟路程.
___________________________________________________It’s a quarter past twelve now.The first one is better than the second one.May 21st is Wang Ping’s birthday.Mike has collected more than five hundred stamps.This bridge is two hundred meters long.There are hundreds of people waiting for the bus.Three fifths of the teachers in this school are young teachers.It’s only five minutes’ walk from my home to Binghu Park.Thanks.Bye.