初中英语中考英语数词复习公开课课件

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
C.Several millions D.Many million
序数词的构成 1) 1－3, first, second, third 。 2) 4－19, 相应基数词+th,
2. hundreds
thousands
(表示概数)
millions
+ of
billions the/some / many/these/those 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。
数词
Numerals
Warming up
1. _______ tress were planted on the mountain
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?
4,321
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
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-three
4
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
A. hundred 0f; hundreds B. hundred; hundreds C. hundreds; hundred
5. A people in the world are sending information by e-mail every day.
A.Several million B.Many millions
and
6 , 500 , 431 , 7 29
hundred
billion million thousand
5
基数词的构成
6500431729 six billion,five hundred million,four hundred and thirty-one thousand seven hundred and twenty-nine
3
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
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
3. __ sheep were killed in the accident. A. Thousand of B. Thousand C. Thousands of
4. There are over nine __ workers in the factory, but __ of young people hope to work in it.
----He was born on ________.
A. second of October B. the October three
C. October the second D. three of October
2
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பைடு நூலகம்数词叫基数词；表 示顺序的数词叫序数词。
homeless.
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
2. In our school about five __ students are able to surf the Internet . A. hunderd of B. hunderds of C. hundred
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