初中英语语法讲解数词用法.ppt

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1、初中英语语法讲解数词用法热身练习热身练习1._tresswereplantedonthemountainlastyear.A.ThousandsofB.ThousandofC.FivethousandofD.Fivethousands.2_ofthestudentsaregirlsinourclassATwothreeBTwothreesCTwothirdsDSecondthree3.-Whenwasheborn?-hewasbornon_.A.secondofOctoberB.theOctoberthreeC.OctoberthesecondD.threeofOctober数词的构成数词的构

2、成基数词的构成基数词的构成1）112,独立成词。独立成词。onetwothreefourfivesixseveneightnineteneleventwelve2）13-19,由由39+teen构成。构成。14fourteen16-sixteen17-seventeen19nineteen特殊拼写特殊拼写:13thirteen15-fifteen18eighteen3）2090,以以-ty结尾。结尾。20twenty30-thirty40forty50fifty80-eighty60-sixty70-seventy90ninety 4）2199，两位数，十位与个位之间有两位数，十位与个位之间有

3、“”。21twentyone55fiftyfive99ninetynine5）101999，三位数，百位与十位，三位数，百位与十位/个位之间加个位之间加and。101onehundredandone840eighthundredandforty693sixhundredandninety-three 29,43150076,thousandhundredmillionbillionand6)1，000以上数目以上数目,从右向左每三位用从右向左每三位用“，”分开分开,分别读为分别读为thousand,million,billion基数词的构成基数词的构成1.If a=3,b=4,whats th

4、e answer to the problem,a+2ab+1=?the answer is_.A.twenty eight B.twenty-eighth C.twenty-eight2.In our school several _ students are able to search the Internet.A.hundred of B.hundreds of C.hundred3.Many _ sheep were killed in the accident.A.thousands of B.thousand C.thousands4.There are over nine _

5、workers in the factory,but _ of young people hope to work in it.A.hundred;hundreds B.hundreds;hundreds C.hundreds;hundred序数词的构成序数词的构成1)13,first,second,third。2)419,相应基数词相应基数词+th,特殊拼写特殊拼写:fifth,eighth,ninth,twelfth。3)2090,y变成变成ie+th,如如twentieth。4)2199,只把个位的基数词变成序数词只把个位的基数词变成序数词如如twenty-first。5)序数词缩写序数

6、词缩写-数字最后两字母数字最后两字母如如1st,2nd,3rd,4th基变序基变序,有规律有规律,一、二、三，特殊记，面目全非要注意，一、二、三，特殊记，面目全非要注意，加加th从从4起，起，八少八少“t”，九去，九去“e”，“ve”要用要用“f”替，替，(five,twelve)见见“y”变成变成“i”和和“e”，词尾加上，词尾加上“th”，(twenty,thirty,ninety)若是遇到几十几，只变个位就可以。若是遇到几十几，只变个位就可以。序数词缩写记清楚序数词缩写记清楚,数字后跟两字母。数字后跟两字母。(序数词构成规律)基数词的用法基数词的用法1、表示表示具体具体数目数目,hund

7、red,thousand,million不用复数不用复数表示表示不确定不确定数目数目,用用复数。复数。即即hundredsof(数百数百),thousandsof(数千数千),millionsof(数百万数百万)+名词复数名词复数,可以用可以用many/several修饰，但不能与具体数目连用。修饰，但不能与具体数目连用。1)Ourcountryhasapopulationof1,300millionpeople.2)Therearethreethousandstudentsinourschool.3)Afterthewar,thousandsofpeoplebecamehomeless.2、

8、“几十几十”的复数形式可以表示：的复数形式可以表示：在某人几十岁时在某人几十岁时-in+ones+整十基整十基数词复数数词复数年年代代-in+the+数词复数数词复数1)Hediedinhisforties四十多岁四十多岁2)Inthenineties,mostpeoplegotoworkbybike.90年代年代3、“基数词基数词+名词名词”的的合成形容词合成形容词作定语，作定语，中间有连字符中间有连字符“”,当中的名词用当中的名词用单数单数。a3yearoldgirlaseven-dayholiday4、表计量、表计量-“基数词基数词+度量单位度量单位+形容词形容词”Theclassroo

9、mis7meterslong,6meterswideand3metershigh.1.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-old2.He came to China _.A.at the age of 20 B.when he is 20 C.at age of 20年龄年龄3.He graduated in _ of _ century.A.the sixtieth;twenty

10、 B.sixty;the twentieth C.the sixties;the twentieth4.He got the prize _.A.in his fifties B.in fifties C.in his fifty5、表示时刻、表示时刻(介词用介词用at)1)顺读法顺读法-先时后分先时后分,“几点几分几点几分”9:30ninethirty6:21sixtwenty-one 3)15分钟：分钟：aquarter30分钟：分钟：ahalf9:15aquarterpastnine12:30halfpasttwelve 表示表示“整点整点”时，在基数词后加时，在基数词后加oclock;

11、9:00oclock2)逆读法逆读法-先分后时先分后时 表示表示“几点几点过过几分几分”，半小时以内，介词用，半小时以内，介词用past分钟数分钟数+past+钟点数钟点数10:10tenpastten8:20twentypasteight表示表示“几点几点差差几分几分”，半小时以上，介词用，半小时以上，介词用to60减原分钟减原分钟+to+(下一个下一个)钟点数钟点数9:50tentoten7:40twentytoeight(1)序数词作定语，前面要加序数词作定语，前面要加the；ThefirsttruckiscarryingafoodbasketJohnlivesonthefifteent

12、hfloorSheismyfirstEnglishteacher.(2)有时加有时加a/an，“再一再一”，“又一又一”的意思的意思WellhavetodoitasecondtimeShallIaskhimathirdtime？WhenIsatdown，afourthmanrosetospeakTheyhadasecondchildin1988序数词的用法序数词的用法编号表示法编号表示法编号在编号在前前，名词在后，用，名词在后，用序序数词，前面有数词，前面有the编号在编号在后后，名词在前，用，名词在前，用基基数词，注意首字母数词，注意首字母大写大写房间号码和电话号码要一个一个分别读房间号码和

13、电话号码要一个一个分别读The First Lesson（在句子中不大写）（在句子中不大写）Lesson One the thirty-second pagePage 32/Page Thirty-twoRoom 305Bus No.12=the No.12 bus第一课第一课第第32页页第第305房间房间第第12路公共汽车路公共汽车15分子分子基数词基数词分母分母序数词序数词one fifth27分子分子 1分母分母+stwo sevenths14分子分子a分母分母 quartera quarter34three quarters12a half13three and one third3基

14、数词基数词+and+分数分数分数百分数分数百分数80%基数词基数词+percenteighty percenthalf/(百百)分数分数+of+可数名词复数可数名词复数 谓语动词用复数谓语动词用复数half/(百百)分数分数+of+不可数名词不可数名词谓语动词用单数谓语动词用单数3.78three point seven eightDiscount，off用于表示“打折”打六折 40%off a 40%discount1._ of the students _ boys in Class A.Two three;are B.Two thirds;are C.Two thirds;is2._ o

15、f her money _ spent on clothes.A.Two three;are B.Two thirds;is C.Two third;is3._ the teachers in our school is about one hundred,and _ of them are women teachers.A.The number of;two third B.The number of;two thirds C.A number of;two thirds一个半小时一个半小时两个半小时两个半小时 two and a half hours=two hours and a hal

16、f one and a half hours=one hour and a half半的表示法半的表示法1.The boy always stays there for _.A.one and half hour B.one and a half hour C.one and a half hours2.The old man drank_ beer.A.two bottles and a half B.two and a half bottle C.two bottle and a half1999 nineteen ninety-nine1999 nineteen ninety-nine2

17、0082008 two thousand and eight two thousand and eight19491949年年10 10月月1 1日日 读作读作:October(the)first,nineteenforty-nine(月月-日，年日，年)thefirstofOctober,nineteenforty-nine（日（日-月，年）月，年）写作写作:October1st,1999(日用缩写，月日用缩写，月-日日-年年)October1,1999(日用数字日用数字)1stOctober,1999日日-月，年月，年年份、日期表达法年份、日期表达法年年用用基数词基数词表示表示,两位一读两

18、位一读,介词用介词用in日日用用序数词序数词表示表示,介词用介词用on1.The accident happened on_.A.April 5,2001 B.2001,April 5 C.April 2001,52.I was born _.A.in March 8,1993 B.on July 9,1994 C.on May,199520世纪90年代in the 1990s数词的表示法数词的表示法 年代世纪年代世纪in the nineteen nineties表示表示“在在世纪世纪”,用序数词。用序数词。在在20世纪世纪写作：写作：in20thcentury读作：读作：inthetwen

19、tiethcentury1.There will be more chances in _ century than in _ century.A.twenty-one,twenty B.twenty-first,twentieth C.the twenty-first,the twentieth2.The city changed a lot _.A.in 1980s B.in the 1980s C.in the 1980一倍一倍 once，两倍，两倍 twice，三倍三倍 three times (三倍或以上三倍或以上 基数词基数词times)数词的表示法数词的表示法 倍数倍数This

20、box is five times as big as that one.=This box is four times bigger than that one.A+be+倍数倍数+as+adj.原原+as+B.A是是B的的 倍倍C+be+倍数倍数+adj.比比+than+D.C比比D 倍倍1.This building is _ that building.A.three time as tall as B.twice taller than C.three times as taller as2.我的箱子比你的重六倍我的箱子比你的重六倍!My box is _ yours.six tim

21、es heavier thanseven times as heavy as6+511 Six plus five is eleven 或 Six and five is eleven.11-65 Eleven minus six is five.4520 Four multiplied by five is twenty.或 Four times five is twenty.2045 Twenty divided by four is five.选择填空。1March is _month of a yearA a three B the third C a third2We will ha

22、ve 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 minutes6The wall is_.A

23、four meters long Bfour meter long Cfour-meter long7Whats the date today?Its_AMarch the eight BMarch eighthCeight，March8It happened in the 1040sA in the forties of the eleventh centuryB in the forties of the tenth centuryC in the forty9About_ of the earths surface is covered with water.A.three-fours

24、B.three-fourth C.three-fourthsAfour meters longBMarch eighthA in the forties of the eleventh centuryC.three-fourths10.He went down to the village which was _miles away from the city.A.three hundreds B.three hundredC.three hundreds ofB.three hundredSummary(小结小结)1.基数词的构成（基数词的构成（6点）点）2.序数词的构成（序数词的构成（5点

25、，记歌谣）点，记歌谣）3.基数词的用法基数词的用法(hundred,thousand,million、岁数与、岁数与年代、年代、“基基名名”、计量、时刻）、计量、时刻）4.序数词的用法序数词的用法(加加the,a/an)5.编号表示法编号表示法(可用序数词可用序数词/基数词基数词,注意加注意加the或大写或大写)6.分数表示法分数表示法(分子分子:基数基数分母分母:序数序数)7.年份、日期、的表达法年份、日期、的表达法(年年:基数基数日、世纪日、世纪:序数序数)Homework1、默写基数词和序数词、默写基数词和序数词2、writing-注意大小写，标点，连接词等注意大小写，标点，连接词等今天

26、是今天是2008年年4月月2日日,星期三星期三,天气晴朗。早上我天气晴朗。早上我8：30分起床，分起床，很快复习完第五单元，然后坐很快复习完第五单元，然后坐5路公汽去了金港湾超市路公汽去了金港湾超市（GoldenGulfMall）。超市里面大约有。超市里面大约有1000人，他们当中约人，他们当中约40%的人是的人是学生。在三楼我碰到一个老外学生。在三楼我碰到一个老外Mr.Will，他比我高一英尺。我们，他比我高一英尺。我们交谈了半个小时。我多么希望能和他再谈一次。买了交谈了半个小时。我多么希望能和他再谈一次。买了2.6公斤苹公斤苹果，三瓶可乐，我高兴地回家了。果，三瓶可乐，我高兴地回家了。谢谢大家！