精选中考英语知识点总复习课件： 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。
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
21 st 45 th
153 rd
Exercise
1、---How old is your son ?
---
. We had a special party for his
birthday last Sunday .
A. Nine ; ninth
B. Nine ; nine
C. Ninth ; nine
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 和个位数之间用连字符“-”。
twenty-one
D. Ninth ; ninth
2、I think that the
century
(世纪) will bring us more hopes .
A. twenty-one B. twentieth-first
C. twenty-first D. twentieth-one
2. 序数词的用法
(1）在使用序数词时，通常前面要加定冠词the.
Lianyungang again . Is it the
time for him ?
---Yes , and he will come for a third time next spring .
A. first B. second C. third D. fourth
3、There are
days in June and
(3) 基数词表顺序，置于名词之后；序数词表 顺序，置于名词之前，且与the连用 Part Two -----the Second Part Lesson Seven-----the Seventh Lesson
page 48-----the forty-eighth page Room 302, World War II
eighteen eighteenth
（2）整十的数字序数词的构成方法：将对应的基 数词结尾y变i，再加-eth.
e.g. twenty thirty forty fifty sixty seventy eighty ninety
twentieth thirtieth fortieth fiftieth sixtieth seventieth eightieth ninetieth
(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
e.g. The second lesson is more difficult than the first.
(2) 序数词前面出现不定冠词a/an时，表示“再一， 又一”。
e.g. We’ve tired it three times. Must we try it a fourth time？
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,
Exercise
1、I got a good present on my and I like it very much .
A. fifteen B. fifteenth C. the fifteen D. the fifteenth
birthday
2、---I hear your pen friend is visiting
Exercise
1、－How many people will come 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
e.g. 4:20 twenty past four 8:42 eighteen to nine 60-42=18 9:50 ten to ten 10:10 ten past ten
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 ?
（5）序数词的缩写形式是由阿拉伯数字加上序数 词的最后两个字母构成的。
e.g. first- 1st fourth-4th
second - 2nd twelfth-12th
third –3rd
twenty - first forty-fifth one hundred and fifty-third
four
fourth
seven seventh
thirteen thirteenth
fifteen fifteenth
seventeen seventeenth
nineteen nineteenth
six
sixth
eleven eleventh
fourteen fourteenth
sixteen sixteenth
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
D. the lesson Twelfth
3、数词的运用
1. 表示时间
（1）先读钟点数, 后读分钟数。
e.g. 10:10 ten ten 4：25 four twenty-five 6：43 six forty-three
(2)用介词past表示几点过几分（不超过半时）； 用to表示差几分到几点。
（3）表示“几十几”时，十位数的基数词不变， 只把个位数变成序数词即可。
e.g. 36 thirty- six 98 ninety-eight
第36 thirty-sixth 第98 ninety-eighth
第 55 第 74 第 88
第1-99
fifty-fifth seventy-fourth eighty-eighth
Children’s Day .
day is
A. thirty ; the second B. thirty ; first C. thirteen ; the first D. thirty ; the first
4、There are _____ people in my family. We live in the _____ floor in a tall 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
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
one hundred two thousand three million four billion