序数词七上U8(答案)教案

课程名称：序数词
教学内容：1.序数词定义及常见的基数词变序数词
2.序数词的用法
教学对象：初一学生
教学目标：1.掌握常见的基数词变序数词
2.掌握序数词的用法
教学重难点：序数词的用法
复习
写出下列单词的基数词形式。

序数词 知识卡片1 1.基础定义：
序数词：表示事物的顺序的词叫序数词。

如第一first 、第二second 、第三third 等。

2. 基数词变序数词 A.1-19基数词变序数词
①特殊：第1至第3 ，one →first ； two →second ；three →third ； ②规律：第4至第19均在相应的基数词后加­th （5，8，9，12除外）。

练习
写出下列几组基数词的序数词
1. one two three
2. Five → fi eight →eigh nine → nin
twelve →twel
3. six seven thirteen
ve 要用f
替
fourteen fifteen sixteen
seventeen eighteen nineteen
B.20-90的整十的基数词变序数词。

规则：把对应的基数词的最后一个字母y变为ie，再加­th，如twenty—twentieth等。

练习
写出下列基数词的序数词
1.twenty →twent
2.sixty—
3.seventy—
4.eighty—
5.ninety—
C.21-29；31-39；...91-99二十以后的非整十的两位或两位以上的基数词变序数词
规则：只将个位数变为序数词，如twenty-one—twenty-first，thirty-four—thirty-fourth 等。

D.100基数词变序数词。

规则：直接加-th。

练习
写出下列基数词的序数词
1.twenty­one →twenty­
2.twenty-two →twenty-
3.twenty­five →
4.thirty-four→
5.forty-seven →
6.fifty-nine →
7.ninety-eight →
8.one hundred →
总结：
随机检测：
写出对应的序数词
知识卡片2
序数词的缩写：由阿拉伯数字加上序数词的最后两个字母构成。

如：fir st→1st第一；seco nd→2nd第二；thi rd→3rd第三；
four th→4th第四；fif th→5th 第五....
练习：
一，写出下列基数词的序数词缩写：
one two three
twenty-one twenty-two twenty-three seventy eighty twenty-seven seventeen fifteen twelve
二，写出下列序数词的完整形式。

1.1st ___________________
2.2nd ___________________
3. 3rd ___________________
4. 4th ___________________
5. 20th ___________________
6. 8th ___________________
7. 9th ___________________
3.写出对应的序数词缩写
典例:
1.January is the first month of the year.
2.February is the second month of the year.
3.Cindy was the second student to get to school this morning．练习：
1.—Which floor? —_____ fifth floor.
A.a
B.an
C.the
D. /
2.___month of the year is May.
A.Two
B. The second
C.Five
D. The fifth
3.There are(twelve) books on the bookcase. The(eight) book is about animals.
4.The Yellow River is the (two) longest river in China.
二.序数词常用作名词的定语，但当名词前已经有形容词性物主代词等限定词时，则不再用定冠词the。

her fourth birthday 她的四岁生日
例题：
1.You are ____ my first good friend here. A.the B./
2.Wang Yaping，China's second woman astronaut（宇航员），gave us students a lesson about space science（太空科学）last year． A.the B./
三.表示编号，“the+序数词+名词”。

第五课the fifth lesson
例题：
1.______house is my house.
A.The fifth
B.Fifth
C.The fiveth
D.Five
练习：
1.March is the __________month of the year.
2.July is the ____________ month of the year.
四.表示日期，几月几号：“月份+序数词”。

练习:
1.Her birthday is on May (five).
2.-When is your mother’s birthday?
-It is on .
A.February eighths B July thirty-third C February 7th D March nineth
3.Today is Friday, November.
A. nine
B.nineth
C.ninth
D.ten
4. He goes home on June ____________.
A.twenty-five
B.twenty-fifth
C.twenty five
用英文写出下列日期：
８月１２日
９月２７日
３月２０日
５月１８日
五.表示分数：基数词和序数词可以构成分数。

其中基数词表分子，序数词表分母。

注意：分子大于1，分母要用复数形式。

二分之一英语习惯表达one/a half，不说one second。

（1/4在7年级下册学到，老师们根据学生情况加减。

）
如：
one tenth 十分之一
two hundredths 百分之二
a third 三分之一
five fourths 五分之四
例题
1._______________ of the students are girls in our class.
A.One three
B.One threes
C.One thirds
D.One third
练习：
1.In our class of the students are girls．
A. three fifth
B. three fifth
C. three fifths D．three fifths
六.表示“又一，再一”；当序数词前有a/an修饰时，此时译为“又一，再一”。

如：I had two apples，but I still want a third one.
我吃了两个苹果了，但我还想再吃一个（第三个）。

例题
A.a
B.an
C. the
D./
总结：
1.基数词变序数词
2.序数词的用法
综合练习
一、写出下列序数词的缩写形式或完整形式。

first－nineteenth－twenty-eight－
3rd－12th－eleventh- twelfth-
20th－80th－29th－
二、单选
1.It’s my ____ first time to go to the cinema.
A.the
B./
C.one
D.a
2. She is ____ first student to come to school.
A.a
B.an
C.the
D./
A. Lesson ten-two
B. Lesson Ten-second
C. the Twelfth Lesson
D. Twelfth lesson
A. twelfth
B. the 12th
C. 12th
5. December the ____ is Christmas.
A. twenty-five
B. twenty-fifth
C. twentieth-five
D. twenty-five
6.The teacher said that ______ of the boys would take part in the talent show.
A.three five
B.third fifths
C.three fifths
D.third five
7.He has failed times，but he won't give up a chance．
A.third，four
B.three，fourth
C.third，fourth
三、根据题意，填入合适的数词。

1.Sunday is the ( ) day of a week.
2.September is the ( ) moth of a year.
3.October the ( ) is National of a year.
测评
1.Autumn is _______________ season in a year.
A.the fourth
B.the third
C.a third
D.the threeth
2.We had a special party for his _____ birthday yesterday night.
A.twenty-second
B.the twenty-second
C. twenty-two
3. March _____ is Women’s Day.
A. eighth
B. ninth
C. tenth
D. eight
4.The Blacks have two children，but they would like to have ____ child．
A.thirds
B.a third
C.third
D.three
5.It is said that the gravity(引力) on the Mars (火星）is only about __________ of the gravity (引力)on the earth.
A. three eighths
B. third eighth
C. three eights
D. third eight
作业：
选择正确的序数词或基数词填空。

3. T oday is Friday, November ___________ (fifth / five).
4.Go along this street and then get left at the ___________ (two/ second)crossing.
5.The _________ (one/first) animal is a dragon.
6.During the Olympics，the man passed his own________ （forty/fortieth） birthday.
7.Mary asked me to repeat the telephone number _____ second time so that she could write it down.二．用下列基数词的正确形式填空。

1.The ___ (eight) lesson is not so easy as the ninth lesson, I think.
2.Liu Xiang got the ___ (one) in his competition of the 2004Olympic Games.
3.[2005年淮安市] Two ___ (three) of the boys in my class are in the school football team.
三.判断对错
四，翻译
二月二日五月三日
八月五日七月十二日
九月二十一日十一月十三日
国庆节愚人节
元旦节万圣节
情人节劳动节
知识卡片1：
练习A
1.first, second,third
2.fifth,eighth,ninth,twelfth
3.sixth,seventh,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth, eighteenth, nineteenth
练习B
1.twentieth
2.sixtieth
3.seventieth
4.eightieth
5.ninetieth
练习C
1.twenty-first
2.twenty-second
3.twenty-fifth
4.thirty-fourth
5.forty-seventh
6.fifty-ninth
7. ninety-eighth
8.one-hundredth
知识卡片2
练习
一:
first, second,third,twenty-first,twenty-second,twenty-second,twenty-third,seventieth,eightieth, twenty-seventh,seventeenth,fifteen, twelfth
二：1.first2. second3.third4.fourth5.twentieth6.eighth 7.ninth
知识卡片3
序数词用法
一.练习:1.C 2.D 3.twelve,eighth4.second
二.例题:1.B 2.A
三.例题:1.A
练习:1.third 2.seventh
四.练习:1.fifth 2.C 3.C 4.B
五.例题:1.D
练习:1.C
六:例题1.D
总结:综合练习
一.1st, 19th, 28th, third, twelfth, 11th,12th, twentieth, eithtieth, twenty-ninth 二, 1.A 2. C 3.C 4C 5B 6B 7C
三，frist,ninth,first
测评：
1.A
2.B
3.A
4.B
5.A
作业：
一1.twelve2.eighth3.fifth4.second5.first6.fortieth7.a
二.1.eighth2.first3.thirds
三.判断对错
twenty-five改为twenty-fifth
四，翻译
二月二日
February 2nd, May 3rd, August 5th, July 12th
September 21rd, November 13th
October 1st, April 1st, January 1st, November 1st,February 14th,。