1、初一秋季英语初一秋季英语第十二讲冀教版冀教版七 年 级 上 册 U N I T 7基数词和序数词1.定义：用来表示_的词2.基数词的构成注意点：_ 分别记；“-”连接_；百位之后加_3.基数词的使用要点（1）修饰泛指名词复数：数字+hundred/thousand/millionhundreds/thousands/millions+of（2）有the特指的名词复数：数字+hundred/thousand/million+of数字14、40几十几and序数词表示顺序的数词为序数词如：first常用于：楼层、日期、生日、排名、顺序序数词基数词基数词序数词序数词4fourfourth6sixsix
2、th7sevenseventh10tententh基变序有规律，词尾加上th基数词基数词序数词序数词1onefirst2twosecond3threethird一二三特殊记，词尾字母tdd基数词基数词序数词序数词8eighteighth9nineninth5fivefifth12twelvetwelfth八去t，九去eve要用f替基数词基数词序数词序数词20twentytwentieth40fortyfortieth80eightyeightieth90ninetyninetiethty变成tie,最后th别忘记基数词基数词序数词序数词21twenty-onetwenty-first56fif
3、ty-sixfifty-sixth73seventy-threeseventy-third99ninety-nineninety-ninth若是遇到几十几，只变个位就可以基变序有规律，词尾加上th一二三特殊记，词尾字母tdd八去t，九去e，ve要用f替ty变成tie,最后th别忘记若是遇到几十几，只变个位就可以基数词变序数词口诀基数词变序数词口诀 thethe+序数词序数词核心语法数词的表达与综合运用【考点一】确切数字与模糊数且表示法 当hundred,thousand,million等前面有不定冠词a或one,two,three,four等数词时，hundred,thousand,milli
4、on等要用单数形式表示“确切数量”。a hundred people four thousand cars seven million dollars【考点一】确切数字与模糊数且表示法 如果表示“数百、数千、数百万”等“模糊数量”时，hundred,thousand,million要用复数形式，且后面要与of连用。hundreds of computers thousands of trees millions of stars【考点一】确切数字与模糊数且表示法 表示“模糊数量”时，还可用and连接两个数词hundred,thousand或million，此时这两个数词都要用复数形式，后面同样
5、都要与of连用。hundreds and thousands of“hundreds and millions of1._visitors came to take photos of Hongyadong during the vacation.A.Thousand B.Thousand of C.Thousands D.Thousands of 2._people visited Hongyadong,Chongqing on May Day this year.A.Thousand B.ThousandsC.Thousand of D.Thousands of3.The CCTV pro
6、gram The Readers interests_ people of all ages.A.thousand B.thousandsC.thousand of D.thousands of4.Nowadays,_ farmers leave their home town to search for work in the cities.A.million of B.two millions C.millions of D.two millions of5.England is becoming a popular tourist destination now.I think so._
7、people come here every summer vacation.A.Hundreds and thousands of B.Hundred and thousand of C.Hundreds and thousands【考点一】确切数字与模糊数且表示法 Two hundreds of the students in our school are girl.数字+百（单数）+of the+名词复数 表示限定范围内的一部分【考点二】年龄、年代表示法 表示“年龄”用基数词，如:eighteen years old“十八岁”;但表示某人多少岁的生日要用序数词，如:his eightee
8、nth birthday“他的十八岁生日”。表示“在某人几十岁时”，把表示“几十”的基数词变为复数形式，且其前用人称代词所有格，如:in his fifties“在他五十岁时”。表示“年代”，在数字后加s或s，且数字前要用the，如:in the 1980s/1980s“在二十世纪八十年代”。1.My daughter is _ years old.Today is her birthday.A.nine;nineth B.nine;ninth C.ninth;nine2.Its my daughters birthday today.Shes _years old.A.eighteen B.
9、eighteenth C.the eighteen D.the eighteenth 3.This Saturday is my _ birthday.Welcome to my party!A.fourteenth B.the fourteenth C.fourteen D.the fourteen【考点三】分数词表示法 分数词由“基数词+序数词”构成，基数词表示“分子”，序数词表示“分母”。当“分子”大于1时，“分母”要用复数形式。比较:one third三分之一，two thirds三分之二，three fifths五分之三，four sevenths七分之四。构成分数词时，基数词与序数
10、词之间加不加横线都可以。如:one-third=one third,three-fifths=three fifths。【考点三】分数词表示法“数词/冠词a+quarter”表示“四分之”，quarter表示“分母”，相当于“数词+fourth(s)”。one/a quartet=one fourththree quarters=three fourths 表示“百分之”的percent或per cent不用复数形式，构成形式:“基数词+percent/per cent”one percent/per centtwenty-six percent/per cent1.Mum,_of my cl
11、assmates glasses.一Oh,my God.You need to protect your eyes well.(2018年宿迁)A.three-fouiths;wears B.three-fourth;wear C.three-fourth;wears D.three-fourths;wea2、-Nowadays China has about 25,000 kilometers of high-speed railways-Thats,_ of the world s total.A.two third B.two-thirdC.two thirds D.two three
12、【考点四】“基数词+名词”构成的合成形容词 “基数词+名词(+形容词)”构成合成形容词时，用连字号“-”连接，连字号后的这个名词不能用复数形式。a 7-day holidaya five-year-old boy1.Have you heard about Zhangjiajie Glass Footbridge?一Of course,it s built over a _ canyon in the Zhangjiajie National Forest Park.A.300-meter-deep B.300-meters-deep C.300 meter deep D.300-meters
13、 deep2.It is five years since we began to enjoy a _ spring holiday each year.A.ten-day B.ten day C.ten days D.ten days【考点五】基数词与序数词辨异 表示人或物的“数量”，要用基数词 five students one hundred computers 表示“第几”要用序数词，前面要与the或人称代词所有格连用。the First World Warthe third floodin her second class“a/an+序数词”不是强调“第几”，而是表示“又一、另一、再
14、一”。a second Lei Feng a third time1.My grandparents live in an old aparhnent with _ floors and they are on the_floor.A.fifth;three B.fifth;third C.five;three D.five;third2.A year is divided into_ months.August is the _month of the year.A.twelve;eight B.twelve;eighth C.twelfth;eight D.twelfth;eighth数词
15、综合练习1.Boys and girls,please turn to Page_and look at the_picture.A.Fifth;five B.Five;five C.Fifth;fifth D.Five;fifth 2.It took _people three months to build this great building.A.two hundreds B.hundred of C.hundreds of D.two hundred of 3.Tony,where is your classroom?It s on the _ floor.What about yo
16、urs?A.three B.third C.threes D.thirds 4.Tony s mum looks young and pretty.Its hard to imagine she is already in her _.A.fifties B.fifty C.fiftieths D.fiftieth5.Basketball is so exciting that _ people play it for fun.A.million B.two millions C.million of D.millions of6.Helen loves reading.She has rea
17、d _ books this month.A.five B.fifth C.five of D.fifth of7.Its reported that over eight _ people lost their lives in the earthquake in Nepal this year.A.thousand B.thousands C.thousand of D.thousands of8.Last year,three hundred English teachers took part in the _English Training.A.two-months B.two-month C.two months D.two month 9._ of the land in that district is covered with trees and grass.A.Fifth two B.Two fifth C.Fifth second D.Two fifths10.Come on,Jimmy.We have already done_ of the work.A.two-three B.two-third C.two-thirds D.second-three
