2022年中考英语复习基数词和序数词ppt课件.pptx

1、基数词和序数词基数词和序数词范围特点实例1-12无规律one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve13-19以teen结尾thirteen,fourteen,fifiteen,sixteen,seventeen,eighteen,nineteen20-90以ty结尾twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety21-99十位与个位之间要加连字符-twenty-five,sixty-five,forty-nine101-99百位与个位之前通常要用and th

2、ree hundred and twenty-five(美语中常将and省略）千以上6275-six thousand two hundred and seventy-five;1200-twelve hundred（one thousand two hundred)155,721-one hundred(and)fifly-five thousand seven hundred(and)twenty-one基基数数词词构构成成表表基数词：表示数目/数量1范围特点实例1-19各基数词词尾加thfour-fourth,six-sixthnineteen-nineteenth七个例外one-fir

3、st,two-second,three-third,five-fifth,eight-eighth,nine-ninth,twelve-twelfth20,30-90把y改i之后加ethtwenty-twentieth,forty-fortiethninety-ninetieth21以后多位数最后一个数用序数词，其余用基数词第21-twenty-first,第110-one hundred and tenth序序数数词词构构成成表表序数词：表示事物的顺序2基数词变序数词的口诀（规律）3 基变序，有规律，一般词尾th。一二三，特殊记，词尾字母ddt(third，second,first)。八减t

4、(eighth),九去e(ninth)，f来把ve替(five-fifth,twelve-twelfth)。若是ty作结尾，ty就变tie，最后再加 th(twenty-twentieth)若是碰到几十几，只变个位就可以。第一百、第一千、第一万、第一百万、第十亿都是在基数词后面直接加 th 构成。如：hundred-hundredth,thousand-thousandth 序数词的缩略形式是由阿拉伯数字序数词的最后两个字母构成。如第25，twenty-fifth=25th 序数词前面要加定冠词 如：She is always the first one to arrive at the of

5、fice.基数词的一般用法基数词的用法3 表示年、月、日2008年12月25日：December 25th,2008 读作：December the twenty-fifth two thousand and eight12个月：twelve month11天：eleven days15岁:fifteen years old 表示时刻8:21 读作 twenty-one past eight/eight twenty-one7:30 读作 half past seven/seven thirty14:50 读作 fourteen fifty/ten to fifteen16:00 读作 six

6、teen oclock/sixteen基数词的一般用法基数词的用法3 表示编号第12号：Number 12 读作 number twelve第211页：Page 211 读作 page two hundred and eleven 表示算式5+6=11 读作 five and six is eleven11-5=6 读作 eleven minus five is six 表示小数1.2 读作 one point two 0.09 读作 zero point zero nine 表示分数（分子用基数，分母用序数，分子大于1，分线用复数）1/2 读作 a/one half 1/8 读作 an/on

7、e eighth (a/an更倾向于口语化）1/4读作：a/one quarter(fourth)2/3读作：two thirds 1-5/9读作one and five ninths基数词变复数的般用法基数词的用法4 与 of 短语连用，表示大概的数量，不能与具体数目连用。如：scores of people 指许多人 hundreds of people 数以百计的人 表示一排或者一组的词组里面，如：They arrived in twos and threes.他们三三两两地到了。表示“几十岁”in 90s 在九十岁时 表示“年代”，用 in+the+数词复数 in the 90s/19

8、90s 在九十年代 在乘法运算的一种表示法里，如 3x5=15 Three fives is/are fifteen.2x6=12 Two sixs is/are twelve.表示地址。英语里面,街道的号码是放在街道名称的前面,楼号和单元号是被放在它们的后面的,而生活区是放在地址的后部.序列是从小到大（单元到生活区）。例如：黄浦区北京路1号,1号楼1单元1号房会写为：Room 1,Unit 1,Building 1,1 Beijing Road,Huangpu District.或Room#1,Unit#1,Building#1,1 Beijing Road,Huangpu District

9、.序数词的一般用法序数词的用法5 表示日期3月8日 March 8th 读作 March the eighth1986年9月1日 September 1st,1986/1st September,1986 表示分数（分子用基数，分母用序数，分子大于1，分线用复数）1/6 one sixth 3/5 three fifths3/37 three thirty-seventh1/3 one third 2/3 two thirds 表示楼层。地面之上的部分，序数词+floor但是英美习惯不同，British convention有Ground floor第一层，再上一层是first floor，A

10、merican convention通常不使用Ground floor，第一层就是first floor，再上一层是second floor。表示顺序的时候，基数词和基数词可以互换。如：Lesson five=the fifth lessonClass five=the fifth Class Grade five=the fifth Grad hundred,thousand,million等百，千，万的词有两种用法：1.做名词时加 s,后面与 of 连用。表示非准确数。如hundreds of students 数以百计的学生2.hundred 作形容词时不用加 s,前面加基数词，如two

11、 hundred students.两百个学生 分数作主语时,谓语动词用单数还是复数1.单纯的分数做主语时，无论其大小，谓语都要用单数形式1）One third is bigger than one quarter.（三分之一多于/大写四分之一。）2）Two and three-tenths equqls two point three.（二又十分之三等于二点三。）重点：6 2.如果是分数修饰名词作主语时，谓语动词的单复数取决于这个名词是否可数 1）如果是不可数名词，则谓语动词用单数。例如：One-third of the water in this river is polluted.这条河

12、里面的水，三分之一都被污染了 2）of后面是可数名词单数，则谓语动词用单数。例如：Two thirds of the desk is painted red.the desk 3）of后面是可数名词复数形式，则谓语动词也用复数形式One-third of the students are girls.（这些学生中三分之一是女生。）当分数词修饰population时，则谓语动词一律用复数形式。如：Seven tenths of the populaiton in China are farmers.重点：6练习练习1.About of the books in our school librar

13、y are written in Chinese.A.four fifthB.four fifthsC.fourth fifthsD.fourths fifth2.He is in our class.A.the fourth tallestB.fourth tallestC.four tallestD.the four tallest3.How many people will come to Beijing next year?Its hard to say.people,I think.A.Million ofB.Millions ofC.MillionsD.million4.In ou

14、r class,of the students girls.A.three fifths,are B.three fifth,areC.three fifths,isD.three fifth,is5.About films were shown during the 5th Shanghai Film International Festival.A.two hundred of B.two hundreds ofC.two hundredD.two hundreds6.The boy always stays there for .A.one and half hour B.one and

15、 a half hour C.one and half hours D.one and a half hours7.He said he was going to be free in .A.one and a half hour B.one hour and half C.one and half hours D.an hour and a half练习练习8.Pls turn to .A.Page 11B.the 11st page C.page 11D.page the 11th9.of the workers in this factory is about two hundred.o

16、f them are women workers.A.The number;First third B.The number;one thirdC.A number;half D.The number;three quarters10.Where are the students?Are they in?A.the Room 406 B.Room 406C.the 406 RoomD.406 Room11.How long is the river?Its metres.A.about three hundred and seventeen B.about two hundreds and f

17、orty-fiveC.more than two hundreds D.less than three hundreds and seventy12.Can you write the number eighty-five thousand,six hundred and twenty-six?Yes,it is .A.85662 B.85626 C.58662D.5862613.May is of a year.A.the fifth monty B.the five months C.the fifth months D.the five month练习练习14.We live in .A

18、.the twenty-first century B.the century twenty-one C.century twenty-oneD.the century twenty-first15.Mr.Smith stayed in last night.A.Room 403B.the Room 403C.the 403 room D.403 the room16.She said she was going to come back in .(选择两个正确答案）A.two and a half hours B.two hours and half C.two and half hours

19、D.two hours and a half E.two hour and a half17.The road is .A.two thousand and five hundred metres long B.two thousands metres longC.long one thousand D.a thousand and five hundreds metres long18.He joined the army on of May 1980.A.1st B.the 1 C.firstD.the first练习练习19.At night we can see stars in th

20、e sky.A.thousands and thousands of B.thousand and thousands of C.thousand and thousands D.thousand and thousand20.There are students in our school.A.four-hundrend and forty-fiveB.four hundrend and forty-fiveC.four hundrends and forty-five D.four-hundrend and forty five21.The teacher told me to go over lessons.A.first three B.the three first C.three the firstD.the first three22.March the is womens day.A.eighth B.ninth C.tenth D.eight23.translate the following into Chinese.45路公共汽车 河源市第二中学 在二十世纪三十年代 红星路48号 第三天早上我没有迟到 Thank you!