英文基数词序数词的表达和用法

6
再来一个
503
five hundred
and
5 03
hundred
three
7
基数词
的构成
百位数 hundred
十/个位数
432 four hundred thirty-two 170 one hundred seventy 865 eight hundred sixty-five 109 one hundred nine
5）101—999，三位数，百位与十位/个位之间加and。
101 one hundred and one
840 eight hundred and forty
693 six hundred and ninety-three5基词729的构成
and
7 29
hundred
seven hundred twenty-nine
a quarter
按顺序读基数词
4:40 twenty to five
5:15 a quarter past five 6:45 a quarter to seven
7:50 seven fifty
1.— It’s already 7:40 now. When will the film start? —___. We still have five minutes. A. A quarter to seven B. A quarter to eight C. Seven past forty-five
4. There are over nine __ workers in the factory, but __ of young people hope to work in it.
A. hundred 0f; hundreds B. hundred; hundreds C. hundreds; hundred
eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen
20 twenty 30 thirty 40 forty 50 fifty 60 sixty 70 seventy 80 eighty 90 ninety 100 one hundred
5. A people in the world are sending information by e-mail every day.
A.Several million B.Many millions
C.Several millions D.Many million
• 1 基数词（ cardinal number）
3）20－90, 以-ty结尾。
20—twenty 30---thirty 40—forty 50—fifty 60---sixty 70---seventy 80---eighty 90—ninety
4）21－99， 两位数，十位与个位之间有 “-”。
21 twenty-one 55 fifty-five 99 ninety-nine
one hundred and twentynine
nineteen
序数词
twelfth
twentieth twenty-first
fortieth one hundredth one hundred and fifth
one hundred and twenty-ninth
nineteenth
练习
888, 888，888，888，888
eight hundred and eighty-eight trillion,
eight hundred and eighty-eight billion,
eight hundred and eighty-eight million, eight hundred and eighty-eight thousand, eight hundred and eighty-eight
125 4280 11712 704653
4453216 94128654 8170346791 16670465342
作业
1254321307 4283216547 178346790 7046534210
3120432130 9428320654 817034679 6704653421
数词的表示法 — 时间 表示在几点钟用介词 at
homeless.
作业
1254321307 4283216547 178346790 7046534210
3120432130 9428320654 817034679 6704653421
warming up
1. _______ tress were planted on the mountain
数词
Numerals
表示数目多少或顺序多少的词叫 数词，数词分为基数词和序数词。 表示数目多少的数词叫基数词；表 示顺序的数词叫序数词。
2
• 1 基数词（ cardinal number）
1 one 11 2 two 12 3 three 13 4 four 14 5 five 15 6 six 16 7 seven 17 8 eight 18 9 nine 19 10 ten
----He was born on ________.
A. second of October B. the October three
C. October the second D. three of October
18
1. — If a = 3, b=4, what’s the answer to the problem, a+2ab+1=? — the answer is___. A. twenty eight B. twenty-eighth C. twenty-eight
24
一.基数词、序数词
基数词 one two three four five six
eight
nine
序数词
基数词
first twelve second twenty
third twenty-one fourth forty
fifth sixth eighth ninth
one hundred
one hundred and five
and eighty-seven million,six hundred and fifty-four thousand, three hundred and twenty-one
三.基数词的用法
1.
数词 (several)+
hundred thousand (表示具体数字) million billion
8
作业
126 307 326 854 203 428 703 703 451 178 651 151 339 704 309 926
注： 1、1000以上几个的词，每三位数加 一个逗号，第一个逗号前的数为thousand， 第二个逗号前的数为million（百万）, 第三 个逗号前的数为billion（十亿），第四个 逗号前的数为trillion（万亿）
基数词的构成
1）1－12, 独立成词。
one two three four five six seven eight nine ten eleven twelve
2）13--19, 由3－9 + teen构成。
14–fourteen 16--sixteen 17--seventeen 19—nineteen 特殊拼写: 13– thirteen 15--fifteen 18—eighteen
序数词的构成
1) 1－3, first, second, third 。 2) 4－19, 相应基数词+th, fourth,fifth,sixth,seventh,eighth,ninth,tenth,eleventh,twe lfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth ,eighteenth,nineteenth. 3) 20－90, y变成ie +th, twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,eig htieth,ninetieth。 4) 21－99, 只把个位的基数词变成序数词
千
百万 十亿
and
6 , 500 , 431 , 7 29
hundred
billion, million, thousand,
12
基数词的构成
6 500 431 729
six
five hundred
four hundred and
thirty-one
seven hundred and
twenty-nine
last year.
A. Thousands of B. Thousand of C. Five thousand of D. Five thousands. 2．______ of the students are girls in our class ． A．Two three B．Two threes C．Two thirds D．Second three 3.----When was he born?
2. In our school about five __ students are able to surf the Internet . A. hunderd of B. hunderds of C. hundred
3. __ sheep were killed in the accident. A. Thousand of B. Thousand C. Thousands of
时间类型
表示法
例
读法
整点
基数词（+ o’clock) 1:00 one o’clock
﹤30分钟 分钟 + past +小时 2:10 ten past two
= 30 分钟 half + past + 小时 3:30 half past three
﹥30分钟
分钟逢15 即 一刻钟 简化法
（60-分钟） + to + （小时 + 1）
44,321 four thousand, three
hundred and twenty-one
7,654,321
seven million,six hundred and fifty four thousand, three hundred and twentyone
1,987,654,321 one billion, nine hundred
2. hundreds thousands millions billions
+ of
(表示概数)
hundreds of
基数词的用法
1、表示具体数目,hundred, thousand, million不用复数
表示不确定数目,用复数。即hundreds of(数百), thousands of(数千), millions of(数百万)+ 名词复数。
trillion [ˈtrɪljən] 万亿 billion [ˈbɪljən] 十亿 million [ˈmɪljən] 百万 thousand ['θaʊznd] 千 hundred [ˈhʌndrəd] 百
基数词的构成
6) 1，000以上数目,从右向左每三位用“，”
分开,分别读为thousand , million, billion
如twenty-first,ninety-ninth
5) 序数词缩写----数字＋最后两字母 如1st, 2nd, 3rd ,4th…
(序数词构成规律)
基变序,有规律,词尾加上“th”， 一、二、三，特殊记，结尾字母t,d,d 八去“t”，九去“e”，“f”要用ve替 见“y”变成“i”和“e”，词尾加上“th”， 若是遇到几十几，只变个位就可以。 序数词缩写记清楚,数字后跟两字母。
1) Our country has a population of 1,300 million people.
2) There are several thousand students in our school. 3) After the war, thousands of people became
数词的表示法 — 年月日
① 月日年 在1998年10月1日 on Oct. 1st , 1998