201X年中考英语知识点总复习 数词课件

2.序数词的构成
（1）第一—第十九的构成。
基数词 one two three five eight nine Twelve 序数词 first second third fifth eighth ninth twelfth
除第一，第二，第三，第五，第八，第九，第十二为 特殊形式，其他的序数词均由其对应的基数词加后缀th构成。
Exercise
2、 In the past twenty years, many tall buildings have been built in our city. look! This is a ______. (09年天津中考)
A. 70-floor building B. 70-floors building C. 70-floor buildings D.70 floors building
Exercise
1、---Excuse me , how does this number 20,135 read ?
---It read
.
A. twenty thousands one hundred and thirty-five
B. twenty thousand one hundred and thirty five
four hundred and four
404
513 222
363 999
（7）1000以上的数目表示方法。
e.g. 2,004 two thousand and four 34,228 thirty-four thousand, two hundred
and twenty-eight
725,369 seven hundred and twenty-five thousand,
C. twenty thousand one hundred and thirty-five
D. twenty thousands , one hundred and thirty-five
Exercise
2、---Bob , can you write the number seven hundred and eighty thousand and thirty-two ?
---Yes , it is _______.
A. 78,032
B. 7,832
C. 7,032 D. 780,032
2. 基数词的运用
（1）表示具体数目时，hundred，thousand，million等 用单数;
e.g. five hundred
eight hundred
(2) 表示不确切数目时可以用复数形式，与of连用表示 “数以….计的”； hundreds of 成百上千 thousands of 成千上万 e.g. Thousands of trees must be planted every year.
数词
基数词 序数词 数词的用法
1、基数词的构成
（1）1-12的基数词是独立的单词，有其各自的形
式。
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
（2）13-19的基数词以-teen结尾。
thirteen fifteen seventeen nineteen
Exercise
1、－How many people will e to Beijing next year? (2009芜湖)
－It’s hard to say, ________ people, I think.
A. million of B. millions of C. three millions D. three millions of
21
thirty-three
33
e.g. 53 64 75 99
（5）百、千、百万、十万的表示方法。
N00 N,000 N,000,000 N,000,000,000
hundred thousand million billion
e.g. 100 2,000 3,000,000
4,000,000,000
three hundred and sixty-nine
17,657,400 1,214,000,000
巧学妙记
一至十二词各异，一个一个单独记，前轻后 重（teen）是十几，前重后轻（ty）是几十 fourteen,forty分清楚，thirteen,thirty看仔细， eighteen(eighty)只有一个t,几十几和几百几 连字符、and莫丢弃
fourteen sixteen eighteen
（3）20-90 的整十位数基数词以-ty结尾。
twenty thirty forty fifty sixty seventy eighty ninety
（4）21-90 的非整十位数的表示法，是在十位数 ur
fourth
seven seventh
(4) 由基数词和名词合成的形容词作定语时，其中 的名词只用单数。
e.g. She wrote a two-thousand-word position last night. Claude is an eleven-year-old boy.
I ‘ m a eighteen- year- old girl.
one hundred two thousand three million four billion
（6）101-999的基数词的表示法，是在百位数和 十位数之间，或在百位数和个位数之间加”and”.
e.g. one hundred and two
102
two hundred and sixteen 216
(3) 基数词的复数形式可用来表示人的岁数和年代。 年代：in the +年代+s(或’s) 表示“在…世纪…年代” in one’s +整10数的复数形式 表示一个不确定的年龄
e.g. He went to the United States in his twenties. That was in the early forties