序数词、分数ppt课件.ppt

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1、Numbers英语英语 专项复习专项复习 数词数词序数词序数词1. 序数词一般由基数词后加序数词一般由基数词后加th构成，前面构成，前面一般加定冠词一般加定冠词the。第第18第第2002. 以以y结尾的基数词构成序数词时，先把结尾的基数词构成序数词时，先把y改成改成i，再加，再加eth。第第50 第第203. 不规则的序数词有以下几个不规则的序数词有以下几个first, second, third, fifth, eighth, ninth,twelfth（一定要记住）（一定要记住）the eighteenththe two hundredththe fiftieththe twentiet

2、h first 1st second 2nd third 3rd fourth 4th fifth 5th sixth 6th seventh 7th eighth 8th ninth 9thtwelfth 12thtwentieth 20ththirtieth 30thfortieth 40thfiftieth 50thsixtieth 60thseventieth 70theightieth 80thninetieth 90thC序数词的缩写形式:阿拉伯数字后加上th。irstlst second2nd third3rdfourth4th twentieth20thtwenty-third

3、23rdD序数词的句法功能序数词在句中可作主语、宾语、定语和表语。The second is what I really need（作主语）He choose the second（作宾语）We are to carry out the first plan（作定语）She is the second in our class（作表语）4. 表示第几十几时，十位用基数词，表示第几十几时，十位用基数词，个位用序数词，十位和各位用连字符个位用序数词，十位和各位用连字符-连接连接第三十一第三十一第六十五第六十五 第七十四第七十四 第九十九第九十九第八十二第八十二thirty-firstsixty-f

4、ifthseventy-fourthninety-nintheighty-second5. 编号的三种表示法编号的三种表示法1）名词基数词）名词基数词 Lesson Three2）the序数词名词序数词名词 the third lesson3）名词）名词数字数字 Lesson 3如：如：5班班Class Five = the fifth class = Class 5一般编码用一般编码用 名词名词 + + 基数词基数词207207房房 三年级一班三年级一班第五部分第五部分第一课第一课3 3 号汽车号汽车第一中学第一中学Room 207 Room 207 Class one Grade thre

5、eClass one Grade threepart five = the fifth partpart five = the fifth partlesson one = the first lesson lesson one = the first lesson Bus No.3 =Bus No.3 = the No.3 busthe No.3 busNo. 1 Middle SchoolNo. 1 Middle School四四. .数词的表示法数词的表示法 编号编号1、This is Mr Whites _ visit in Beijing. He has been there twi

6、ce before.A. two B. second C. three D. third2、There are _ months in a year. October is the _ month.A. twelve, ten B. twelfth , tenthC. twelve, tenth D. twelfth, ten3、There are _ people in Peters family. They live on the _ floor in tall building.A. six, eighteen B. six, eighteenthC. sixth, eighteenth

7、 D. sixth, eighteen4、 _ is the easiest of all.A. Lesson one B. The Lesson oneC. Lesson First D. The first lesson5、 The foreign guests stayed in _ last night.A. Room 608 B. the Room 608C. the 608 room D. 608 the room注：通常前面要加定冠词 the；但出现不定冠词a或an时，则表示“再”，“又”。Well go over it a second time特别说明：特别说明：1、世纪、年

8、代、年份、月份时，用介词、世纪、年代、年份、月份时，用介词in2、某一天、星期前用介词、某一天、星期前用介词on3、某一天早晨、下午或晚上时，用介词、某一天早晨、下午或晚上时，用介词on。1、_ a cold morning，the old man died lonely in his house2、The girl was sent to hospital _ the morning of March 20.3、My son was born _ October 2010.4、People are very poor _ the fifties.Ononinin 分数，小数，分数，小数， 百

9、分比百分比热门考点一：热门考点一：hundred、 thousand、 million、 billion的考查方法的考查方法1和和“of”连用，前面不能有具体的数连用，前面不能有具体的数,而且这四个词的本身而且这四个词的本身必须用复数。如必须用复数。如 hundreds of 数以百计的数以百计的 thousands of 数以千计的数以千计的 millions of 数以百万计的数以百万计的 billions of 数以十亿计的数以十亿计的 many hundreds of students. 好几百个学生好几百个学生2当它们的前面有具体的数修饰时当它们的前面有具体的数修饰时,其本身即不能用

10、复数，其本身即不能用复数，不能和不能和“of”连用。连用。two thousand students 两千名学生两千名学生 five hundred cars 五百辆车五百辆车 1、By the end of last year, we had planted about five _ trees.A. hundred B. hundreds C. hundred of D. hundreds of2、_ books must be produced for the children.A. many thousands B. many thousands ofC. many thousand

11、of D. many thousand热门考点二：其它重要表达方式的考法热门考点二：其它重要表达方式的考法1. 在某人多少岁在某人多少岁 in + ones + 几十的复数形式几十的复数形式 eg:My parents are in their fifties.2a five-year-old boy an eight-year-old girl3100-meter-long bridge (100米长的桥米长的桥) 10 meters deep (10米深米深)4ten-minute walk = ten minutes walk5. two more hours= another two

12、hours.( )1、The has written a _ compositionAthree-hundred-word Bthree- hundred- wordsCthree hundreds wordsDthree hundreds word ( )2、Every day the old woman sits here for _.A. one and half hour B. one and a half hourC. one hours and a half D. one and a half hours ( )3、He became very rich _.A. in his f

13、ortyB. in the fortiesC. in his forties D. in the forty ( )4、Mary is _ girl.A. an 8 year- oldsB. an 8-year-oldC. an 8 -years -old D. a 8-year-old ADCB( )5、Guangzhou Tower is almost _A600 meter high B600 meters highC600-meters-highD600-meter-high ( )6、Have you got enough books? No. I need _.A. ten mor

14、e B. more tenC. ten another D. other tenBA选择填空。1March is _month of a yearA a three B the third C a third2We will have a meeting at 8:05_Afive to eight Beight five Ceight o five3Eight plus eight is_.Asixteen Bsixty-four Cone4He is an _boyAeight years Beight-year-old Ceight-years-old5We will have a_ walkAten minutes Bten minutes Cten-minutesB the thirdCeight o fiveAsixteenBeight-year-oldBten minutes