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1、数词数词Numeralswarmingup1._tresswereplantedonthemountainlastyear.A.ThousandsofB.ThousandofC.FivethousandofD.Fivethousands.2_ofthestudentsaregirlsinourclassATwothreeBTwothreesCTwothirdsDSecondthree3.-Whenwasheborn?-Hewasbornon_.A.secondofOctoberB.theOctoberthreeC.OctoberthesecondD.threeofOctober2表示数目多少或
2、顺序多少的词叫表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。数词，数词分为基数词和序数词。表示数目多少的数词叫表示数目多少的数词叫基数词基数词；表；表示顺序的数词叫示顺序的数词叫序数词序数词。3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
3、。结尾。20twenty30-thirty40forty50fifty60-sixty70-seventy80-eighty90ninety 4）2199，两位数，十位与个位之间有两位数，十位与个位之间有“”。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 429,43150076,thousandhundredmillionbillionand6)
4、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5基数词的构成基数词的构成6500431729six billion,five hundred million,four hundred and thirty-one thousand seven hundred and twenty-ninefour thousand three hundred and twenty-oneseven million,six hundred and fifty four thousand thre
5、e hundred and twenty-one7,654,3211,987,654,32143214,321one billion,nine hundred and eighty-seven million,six hundred and fifty-four thousand three hundred and twenty-one1.hundred thousand (表示具体数字表示具体数字)million billion2.hundreds thousands (表示概数表示概数)millions billions三三.基数词的用法基数词的用法数词数词(several)+)+ofth
6、e/some/many/these/those hundreds of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,hundred,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。1)Ourcountryhasapopulationof1,300millionpeople.2)Thereareseveralthousandstudentsinourschool.3)Afterthewar,thousandsof
7、peoplebecamehomeless.1.If a=3,b=4,whats the answer to the problem,a+2ab+1=?the answer is_.A.twenty eight B.twenty-eighth C.twenty-eight2.In our school about five _ students are able to surf the Internet.A.hunderd of B.hunderds of C.hundred3._ sheep were killed in the accident.A.Thousand of B.Thousan
8、d C.Thousands of4.There are over nine _ workers in the factory,but _ of young people hope to work in it.A.hundred 0f;hundreds B.hundred;hundreds C.hundreds;hundred5.people in the world are sending information by e-mail every day.A.Several million B.Many millionsC.Several millions D.Many million A序数词
9、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,fourth,fifth,sixth,seventh,eighth,ninth,tenth,eleventh,twelfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth.3)2090,y变成变成ie+th,twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,eightieth,ninetieth。4)2199,只把个位的
10、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,ninety-ninth5)序数词缩写序数词缩写-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,词尾加上词尾加上“th”，一、二、三，特殊记，结尾字母一、二、三，特殊记，结尾字母t,d,d八去八去“t”，九去，九去“e”，“f”要把要把ve替替见见“y”变成变成“i”和和“e”，词尾加上，词尾加上“th”，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)14基数词基数词序数词序数词
11、基数词基数词序数词序数词oneonetweltwelvevetwotwotwenttwenty ythreethreetwentytwenty-one-onefofou ur rfortforty yfi fiveveone hundredone hundredsixsixone hundred one hundred andand five fiveeigheight tone hundred one hundred and twenty-and twenty-ninenineninnine eninnine eteenteen一一.基数词、序数词基数词、序数词firstsecondthir
12、dfourthfifthsixtheighthninthtwelfthtwentiethtwenty-firstfortiethone hundredthone hundred and fifthone hundred and twenty-ninthnineteenth时间类型时间类型表示法表示法例例读法读法整点整点基数词（基数词（+oclock)1:0030分钟分钟分钟分钟+past+小时小时 2:10=30 分钟分钟half+past+小时小时3:3030分钟分钟（60-分钟）分钟）+to+（小时（小时+1）4:40分钟逢分钟逢15即即 一刻钟一刻钟a quarter5:156:45简化
13、法简化法按顺序读基数词按顺序读基数词7:50one oclockten past twohalf past threetwenty to fivea quarter past fivea quarter to sevenseven fifty表示在几点钟用介词表示在几点钟用介词 at数词的表示法数词的表示法 时间时间1.Its already 7:40 now.When will the film start?_.We still have five minutes.A.A quarter to seven B.A quarter to eight C.Seven past forty-fiv
14、e 月日年月日年 在在1998年年10月月1日日数词的表示法数词的表示法 年月日年月日on Octorber the first,nineteen ninety-eight日日the+序数词序数词月月（首字母大写）（首字母大写）月日与年之间月日与年之间用用 ，分开分开年年（两位两位读）（两位两位读）on August the ninthin May,two thousand and ten天日用天日用 on 年月用年月用inon Oct.1st,1998月日月日在在8月月9日日月年月年在在2010年年5月月 1.The accident happened on_.A.April 5,2001
15、B.2001,April 5 C.April 2001,5 2.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/1990s在他50多岁时in his fifties数词的表示法数词的表示法 1.1.年代世纪年代世纪in thein ones+整十基数词复数在某人几十岁时nineteen nineties2、“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-day
16、holiday3、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”Theclassroomis7meterslong,6meterswideand3metershigh.211.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 19803.
17、He graduated in _ of _ century.A.the sixtieth;twenty B.sixty;the twentieth C.his sixties;the twentieth4.She got the prize _.A.in her fifties B.in fifties C.in her fifty5.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-old6
18、.He came to China _.A.at the age of 20 B.when he is 20 C.at age of 207.The river is about _.A.6,000 meters long B.6,000-meters-long C.6,000-meter-longbe+数词数词+度量词度量词+形容词形容词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 thir
19、d3基数词基数词+and+分数分数数词的表示法数词的表示法 分数百分数分数百分数80%基数词基数词+percenteighty percent百分数百分数+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百分数百分数+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Seventy percent of students in our class are girlsOver seventy percent of the earths surface is covered with water1._ of the students _ boys in Class A.Two th
20、ree;are B.Two thirds;are C.Two thirds;is2._ of 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 thirds B.The number of;two third C.A number of;two thirds一个半小时一个半小时两个半小时两
21、个半小时 two and a half hours=two hours and a half one and a half hours=one hour and a half数词的表示法数词的表示法 半的表示法半的表示法1.The boy always stays there for _.A.three and half hour B.three hour and a half C.three and a half hours2.The old man drank_ beer.A.two bottles and a half B.two and a half bottle C.two bott
22、le and a half一般编码用一般编码用 名词名词+基数词基数词207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 号汽车号汽车第一中学第一中学Room 207 Class One Grade ThreePart five=the fifth partLesson one=the first lesson Bus No.3=the No.3 busNo.1 Middle School数词的表示法数词的表示法 编号编号1.My mother lives at on floor.A.Room Six;the second B.Six Room;secondC.Room six;t
23、wo D.the room six;the secondA(1)小数的读法小数的读法 小数点左边的数通常按基数词读，若为三位以上的数，也小数点左边的数通常按基数词读，若为三位以上的数，也可按编码式读法读出，即将数字单个读出；小数点右边的数可按编码式读法读出，即将数字单个读出；小数点右边的数通常按编码式读法单个读出。如：通常按编码式读法单个读出。如：6.86 six point eight six 14.15 fourteen point one five(2)小数中小数中“0”的读法的读法 “0”在小数中通常读作在小数中通常读作nought（英）或（英）或zero（美），也可（美），也可读作字
24、母读作字母o。如：。如：0.08（nought）point nought eight 或或（zero）point zero eight 小数表示法小数表示法 6+511 Six plus five is eleven 或 Six and five is eleven.11-65 Eleven minus six is five.或 Six from eleven is five.4520 Four multiplied by five is twenty.或 Four times five is twenty.2045 Twenty divided by four is five.或 Four
25、 into twenty goes five.3 Three squared is nine.2 Two cubed is eight.加减乘除式的表达方法加减乘除式的表达方法 23表示“大约、接近”，常用nearly,about,some,almost,around 等。about 700 people some fifty years ago 表示“左右”用or so In the past five years or so “少于”用less than Less than 30 years old 不到30岁“多于”用 more than,over More than a year ag
26、o over 70 years ago约数表示法约数表示法(1)序数词作定语，前面要加序数词作定语，前面要加the；ThefirsttruckiscarryingafoodbasketJohnlivesonthefifteenthfloorSheismyfirstEnglishteacher.(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3
27、4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 B.eight to 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-min
28、utesB the thirdCeight o fiveAsixteenBeight-year-oldBten minutes6The wall is_.Afour meters long Bfour meter long Cfour-meter long7Whats the date today?Its_AMarch the eight BMarch the eighthCeight，March8It happened in the 1040sA in the forties of the eleventh centuryB in the forties of the tenth centu
29、ryC in the forty9About_ of the earths surface is covered with water.A.three-fours B.three-fourth C.three-fourthsAfour meters longBMarch the 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 hundredHomework1.Grammar focus textbook(p30)exercise1-22、Workbook(p19)exercise438