(共32张PPT)
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
数词
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
表示数量:
one, two, three
表示顺序:
first, second,third
序数词前通常要加the。
基数词:表示数量
three
five
six
seven
two
four
one
基数词的构成
(1).数字1-12 没有规律
分别由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
基数词的构成
(2).13-19均以后缀-teen结尾。
13 thirteen 14 fourteen 15 fifteen
16 sixteen 17seventeen 18 eighteen
19 nineteen
注意:thirteen,fifteen,eighteen
基数词的构成
(3).20-90的整十数词均以后缀-ty结尾。
20 twenty 30 thirty
40 forty 50 fifty
60 sixty 70 seventy
80 eighty 90 ninety
注意:thirty,forty,fifty,eighty
hundred百
one hundred 100
five hundred 500
基数词的构成
(4).21-99:表示“几十几”时, 十位和个位之间需加连词符
21 twenty-one 32 thirty-two
43 forty-three 54 fifty-five
65 sixty-five 76 seventy-six
87 eighty-seven 98 ninty-eight
(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;
找清规律很容易,十二以内词名异;
十三数到十九去,后加-teen莫忘记。
二十、 三十至九十,整十之后有-ty;
如果要说"几十几",中间"-"号别丢弃,
hundred是"百",请你记住莫大意
友情提示:注意-ty和-teen的发音哦!
基数词的构成口诀
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
二.
序数词
“基”变“序”很容易,词尾加上 “th”;
一二三无规律,理应单独来记忆。
“八”减 “ t”、“九”去 “ e”、“f”来把 “ ve”、
“二十” 到“九十”,“ty”变成“tie”
若是遇到"几十几",只变个位就可以。
序数词的构成口诀
one
two
three
first
second
third
第一招
词尾字母t, d, d
第1,2,3单独记
eigh
eigh
nin
t
nin
e
第二招
th
th
8去t
9去e
然后再加th
fi
fi
第三招
ve
f
th
twel
ve
twel
f
th
遇到ve,f替
然后再加th
20
30
40
50
60
70
80
90
fifty
forty
thirty
sixty
seventy
eighty
ninety
thirtieth
fortieth
fiftieth
sixtieth
seventieth
eightieth
ninetieth
twenty
twent
ieth
整十
21 twenty-one
22 twenty-two
23 twenty-three
28 twenty-eight
35 thirty-five
twenty-second
twenty-third
twenty-eighth
thirty-fifth
第五招
twenty-
first
th 从4加起(剩下的序数词都是基数词末尾加th构成)
ten
th
four
th
eleven
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
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
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
序数词缩写
序数词的缩写形式, 由阿拉伯数字加序数词的最后两个字母构成。
例如:
first—1st; second—2nd; third—3rd; fourth—4th; twentieth—20th;
twenty-first—21st; twenty-second—2nd;twenty-third—23rd;
1st, 2nd, 3rd为特殊形式, 其它的都是阿拉伯数字后加上th。
中考挑战
Task 3:
杨
中考真题练习
Ⅰ. 用所给数词的适当形式填空
.(2011·扬州中考)Even a child knows September is the _______ (nine) month of a year.
答案: 1.ninth
中考真题练习
3. (2011 ·烟台中考)I’ve bought a present for my father’s _______ (forty)birthday.
4. (2011·肇庆中考)Mr. Smith lives on the _______ (six) floor.
5. (2011·上海中考) Climb up to the _______ (eleven) floor, and you can enjoy a better view.
答案: 3. fortieth 4. sixth 5. eleventh
中考真题练习
Ⅱ. 单项选择
1. (2012·六盘水中考)There are _______ days in a week and Tuesday is _______ day of the week.
A. seven; third B. seven; the third
C. seventh; three D. the seventh; three
【解析】选B。句意:一个周有七天,星期二是一个周的第三天。第一个空用基数词表示数量,第二个空用序数词表示次序,且其前加the。故选B。