数词的用法.ppt

数词,数词分为基数词和序数词。,一 基数词的构成 1 one 11 eleven 20 twenty 2 two 12 twelve 21 twenty-one 3 three 13 thirteen 30 thirty 4 four 14 fourteen 40 forty 5 five 15 fifteen 50 fifty 6 six 16 sixteen 60 sixty 7 seven 17 seventeen 70 seventy 8 eight 18 eighteen 80 eighty 9 nine 19 nineteen 90 ninety 10 ten 100 one/a hundred,基数词的读法,1、百位和十位间用 and 连接,十位和个位间用-连接,three hundred and twenty-one,321,2、右往左数,三位一组,逗号隔开.依次是 thousand(千)1，000 million(百万)1，000,000 billion(十亿)1,000,000,000,1.hundred thousand(表示具体数字)million billion2.hundreds thousands(表示概数)millions(数以 计)billions,基数词的用法-表示数量,具体数字+,+of+复数名词,二 序数词的构成,1st 2nd 3rd fourth 4th 5th sixth 6th seventh 7th 8th 9th,first,second,third,fifth,eighth,ninth,nine,二 序数词的构成 21 twenty-21st 22 twenty-22nd 23 twenty-23rd 24 twenty-fourth 24th.,first,scond,third,练一练 一 读出下列数字 79 103 999 1,302 6,896,203 123,234,438,209 第九 第四十 第五十二 第八十六 第三百零三 _,the three hundred and third,基数词的用法,one oclock,ten past two,half past three,twenty to five,a quarter past five,a quarter to seven,seven fifty,表示在几点钟用介词 at,1.表时间 1)钟点时间,2)数词表示年 月 日 英语年月日的顺序：月 日，年 a.在 2011年5 月1号 写作：on May 1(st),2011 读作：on the first of May,two thousand and eleven 或on May the first,two thousand and eleven b.在1989年9月 写作：in September,1989,on+日on+月.日on+年.月.日,in+月in+年 in+年.月 in+季节,80%,基数词+percent（%）,3.78,three point seven eight 小数点,基数词的用法 2：百分数：,基数词的用法3：小数：,1）.表示十几岁用teens指从13岁到19岁。在某人十几岁时：in ones teens.2）.表示“几十岁”；用 in ones+整十数词复数的复数in ones thirties 表示在某人三十几岁时（3039岁）。在他五十多岁时，写作_3）18岁：eighteen years old4）一个十八岁的男孩：an 18-year-old boy5）,in his fifties,数词的用法4 年龄：,at the age of+年龄：在几岁的时候,The winner is _.He is an _ boy.A.eight-year-old;eight years old B.eight years old;eight-year-old C.eight-years old;eight-year-old He came to China _.A.at the age of 20 B.when he is 20 C.at age of 20,基数词的用法4 年龄,基数词常与名词构成的合成词在句中作定语，中间要用连字符“-”，这个名词只用单数形式,a seven-day holiday a three-year-old girl,The river is about _.A.6,000 meters long B.6,000-meters-long C.6,000-meter-long,基数词的用法5：计量,be+数词+量词+形容词,一倍 once，两倍 twice，三倍 three times(三倍或以上：基数词times),基数词的用法6：倍数,This box is five times as big as that one.=This box is four times bigger than that one.,A+be+倍数+as+adj.原+as+B.A是B的 倍A+be+倍数+adj.比+than+B.A比B（宽，大，长）倍数,15,分子 基数词分母 序数词,one fifth,27,分子 1分母+s,two sevenths,14,分子 a分母 quarter,a quarter,34,three quarters,12,a half,13,three and one third,3,基数词+and+分数,数词的用法7 分数：,分子用基数词，分母用序数词，当分子超过“1”时，分母用复数。,_ of the land in that district _ covered with trees and grass.A.Two fifth,is B.Two fifth,areC.Two fifths,is D.Two fifths,are,C,一般编码用 名词+基数词207房 三年级一班第五部分第一课3 号汽车第一中学,Room 207 Class One Grade ThreePart five=the fifth partLesson one=the first lesson Bus No.3=the No.3 busNo.1 Middle School,基数词的用法8 编号,基数词也可以表示顺序。the first lessonLesson One,1）.in the+数词的复数，意为 在年代，如:in the nineties 在九十年代 可写作：in the 90s 2）.in the+序数词+century,意为在世纪如：在19世纪 in the nineteenth century 在十九世纪三十年代 写作 _,in the 1830s,数词的用法9 世纪年代,1.It is not rare in _ that people in _ fifties are going to university for further education.A.90s,theB.the 90s,/C.90s,their D.the 90s,their2.Jack is now in _.the three grade B.Grade Third C.Grade Three3.-Peter,how old is your father this year?-_.And we just had a party for his _birthday last weekFortieth,forty B.Forty,fortyC.Forty,fortieth D.Fortieth,forthieth,c,C,C,1.“加”用plus：pls，and或add表示 How much is two plus three?It is five Two and three is equal to five2.“减”用 minus：mains How much is ten minus six?3.“乘”times或者multiplymltiplai 3X4?How much is three four?4.“除”用divide的过去分词形式表示 164=?How much is sixteen divided by four?,数词的用法10 加减乘除,注：通常序数词前面要加定冠词 the；但出现不定冠词a或an时，则表示“再一”，“又一”。Can you give me a second time,人民币 RMB：yuan英镑 GBP：pound(s)美元 USD:dollar(s)欧元EUR:euro（s）,常见钱币单位,jr,常考习题 选择题 1.-When was he born?-He was born _.A.in 1988 June 6 B.on June 6,in 1988 C.in June 6,1988 D.on June 6,1988 2.The library in the school isnt large.There are only _books in it.A.six thousand,five hundred and forty-one B.six thousand and five hundred and forty-one C.six thousands five hundred forty and one D.six thousand,five hundreds and forth one 3.Athough I failed four times,my father encouraged me to try a _time.A.two B.four C.third D.fifth,D,A,D,4.The Olympics Games are held _.A.every four years B.every four year C.every fourth years D.every four-year 5.The yellow river is _in China.It goes through many cities in China.A.the second longest river B.the longest scond river C.the second longest rivers D.the longest scond rivers,A,A,6.In our school more than _boys _like English.A.two fifths;dont B.two fives dont C.two fifths doesnt D.scond five doesnt 7.The car cost me _dollars.A.eight thousands B.eight thousand of C.eight thousands of D.thousand of 8.The war took place _.A.1720s B.1720s C.in the 1720s D.the 17209.I got a beautiful bike on _birthday.I like it very much.A.fifteenth B.fifteen C.my fifteen D.my fifteenth,A,C,D,A,10 Five minus two_three.A.was B.are C.were D.is,D,1026500123456789第一第五第二十一1/32/79.82：00,作业：,5：305:067:587069 在1983年在20世纪50年代在1998年4月1号在9月在10月1号,January1月 Jan.February2月 Feb.March3月 Mar.April4月 Apr.May5月 May.June6月 Jun.July7月 Jul.August8月 Aug.September-9月 Sept.October10月 Oct.November11月 Nov.December12月 Dec.,Monday 周一 Tuesday 周二Wednesday 周三 Thursday 周四Friday 周五 Saturday 周六Sunday 周日,century-世纪 In the 20th century：在20世纪decade-十年in the 1990s：在20世纪90年代year-年season-季节month-月day-天date-日期,春：spring夏：summer秋：autumn冬：winter,Thank you,