专项复习----数词
基数词和序数词
学习目标
• 1.知识目标:掌握基数词和序数词
• 2.技能目标:学会运用基数词和序数词
• 3.情感目标:让学生在日常生活中多使
用数词
复习案
数词---就是表示事物的数量
和顺序的词,分为基数词和序
数词两种。
数
词
基数词
序数词
表示事物的数量
表示事物的顺序
(1)1-12分别由从one到twelve12个
各不相同的词表示。
0 zero 1 one 2 two 3 three
4 four 5 five 6 six 7 seven
8 eight 9 nine 10 ten 11 eleven
12 twelve
基数词
构成方法如下:
13 thirteen 14 fourteen
15 fifteen 16 sixteen
17seventeen 18 eighteen
19 nineteen
(2)13-19均以后缀-teen结尾。
20 twenty 30 thirty 40 forty
50 fifty 60 sixty 70 seventy
80 eighty 90 ninety
(3)20-90的整十数词均以后缀-ty结
尾。
表示“几十几”时, 个位和十位之
间需加连词符, 如: twenty-one,
thirty-two, forty-three.
(4)三位数数词:
百位和十位(若无十位则和个位)
之间用and连接,十位和个位间用
“-” 连接。
156 one hundred and fifty-six;
810 eight hundred and ten
204 two hundred and four;
小小练兵场(抢答)
• 拼出下列基数词。
• 8—— 50——
• 12—— 64——
• 20—— 87——
• 35—— 42——
• 99—— 78——
eight
twelve
twenty
thirty-five
ninety-nine
fifty
sixty-four
eight-seven
forty-two
seven-eight
探究案
小组讨论基数词的用法:
1.表示人,物的数量。基数词放在名词前。Five apples
2.表示年龄,基数词放 year(s) old前.Two years old.
3.用于计算。 What is two and three? It is five.
4.表示顺序,编号等。一般放在名词后。Lesson One.
5.用来表示时间。 At three fifteen
6.表示年代 in 1998
快乐练兵场
• 1.He has (6) balls.
• 2.She is (9) years old.
• 3.Tom is in Class (4)
• 4.It is about (12)o’clock
• 5.11 and _____19 is____
30
six
nine
Four
twelve
eleven nineteen thirty
one
two
three
four
five
six
seven
eight
nine
ten
first
second
third
fourth
fifth
sixth
seventh
eighth
ninth
tenth
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
twenty
eleventh
twelfth
thirteenth
fourteenth
fifteenth
sixteenth
seventeenth
eighteenth
nineteenth
twentieth
11th
12th
13th
14th
15th
16th
17th
18th
19th
20th
基数词 Cardinal Numbers 序数词 Ordinal Numbers
twenty-one
twenty-two
twenty-three
thirty
forty
fifty
sixty
seventy
eighty
ninety
hundred
twenty-first
twenty-second
twenty-third
thirtieth
fortieth
fiftieth
sixtieth
seventieth
eightieth
ninetieth
hundredth
21st
22nd
23rd
30th
40th
50th
60th
70th
80th
90th
100th
基数词 序数词
基变序规律【记忆口诀】
基变序,容易记,一般在基数词词尾加-th。
一、二、三特殊记,(one →first 第一 two →
second 第二; three →third 第三)
八去t,,九去e, ve要用f替,然后再加-th。(特殊:
five→fifth第五; eight → eighth 第八; nine→ninth
第九twelve → twelfth 第十二)
整十变化需注意,把y变i加eth.
若是遇到几十几,只变个位就可以。
序数词表顺序,一般须加定冠词the。
20, 30
40, 50,
60, 70,
80, 90
-ty变为-
tie再加th
twenty → twentieth 第二十
thirty → thirtieth 第三十
forty →fortieth 第四十
fifty → fiftieth 第五十
sixty → sixtieth 第六十
seventy → seventieth 第七十
eighty → eightieth 第八十
ninety → ninetieth 第九十
其余两
位数
将相应基数
词的个位改
为基数词
twenty-one → twenty-first 第
二十一;thirty-nine → thirty-
ninth第三十九;forty-six →
forty-sixth 第四十六
小小练兵场(抢答)
• 拼出下列序数词。
• 9____ 3___
• 12___ 2___
• 20___ 8___
• 55___ 43___
• 69___ 91___
ninth
twelfth
twentieth
fifty-fifth
sixty-ninth
third
second
eighth
forty-third
ninety-first
探究案
小组讨论序数词的用法:
1.表示日期。October the first
2.表示某人第多少岁的生日。
his fiftieth birthday.
3.表示事物的顺序,编号。
the first lesson.
小小练兵场(抢答)
• 1.Monday is the ______(2) day of
the week.We must go to school.
• 2.The ______(12) month of a year is
December.
• 3.The_______ (24) lesson is very
easy for me.
• 4.My father’s birthday is on
December_______(20)
second
twelfth
twenty-fourth
twentieth
当堂检测(基序混合)
选择
1. The____ month of the year is
February A. one B. first
C. two D. second
2. December is the_____ month of the
year.
A. twelve B. twelveth
C. twelvieth D. twelfth
D
D
D
3.Please turn to Page and look at
the picture.
A.Fifth,five B.Five,fifth
C. Fifth,fifth D.Five,five
B
4. There are seconds in a minute
A. fourty B. forty C. sixteen D. sixty
D
• 5.—Peter,how old is your father this year?
_ ____ .And we shall have a party for
his____ birthday tomorrow
A.Fortieth,forty B.Forty, forty
C.Forty,fortieth D.Fortieth, fortieth
C