英语语法数词专题
高中英语语法复习数词
加减乘除表示法
❖ 1. “加”用plus，and或add表示； ❖ “等于”用is，make，equal等词表示。 ❖ 2+3= 可表示为：How much is two plus
❖ 在我们班她是第二名。（作表语）
序号表示法
（1）单纯的序号，可在基数词前加number,简写为No.。 如：No.1 第一号
（2）事物名词的序号表达法有所不同： ❖ ①对于一些小序号可用序数词也可用基数词表达，形式分别
为：the + 序数词 + 名词 / 名词 + 基数词。 ❖ 如：第一次世界大战可以表示为 ❖ the First World War = World War One, ❖ Lesson 8 = the eighth lesson ❖ ②对于一些大序号我们通常只用一种表达法， ❖ 即名词 + 数词。 ❖ 如：501号房间表示为 Room 501, ❖ 538路公共汽车表示为 Bus 538。 ❖ ③可用a / the + number + 基数词 + 名词。 ❖ 如：a No.5 bus一辆五路公共汽车， ❖ the No.8 bus那辆8路公共汽车。
They produced more products in 2001 than those in 2000 by twice.
The production of grain has been increased by four times this year.
（3）倍数用在表示度量名词前，其基本结构为：
twelve． Three multiplied by four makes
小学英语单词语法-数词
专题五 数词考点一数词的分类知识讲解数词分为基数词和序数词。
基数词变化特点例词1-12的基数词独立的单词one, two, three, four, five, six, seven,eight, nine, ten, eleven, twelve13-19的基数词以-teen结尾如：fourteen, seventeen等。
13，15，18较特殊，13thirteen,15fifteen, 18eighteen20-90的整十位均以-ty结尾如：sixty, ninety. 但20，30，40，50，80较特殊，20 twenty, 30 thirty,40 forty, 50 fifty, 80 eighty整十之间的数（大于20的）整十加个位数整十和个位数之间要用连字符-。
如：28 twenty-eight, 96 ninety-six百位数以上的数字百位和十位（若无十位则和个位）之间加and如：148 one hundred and forty-eight，406 four hundred and six序数词变化待点例词一般的在与之相应的基数词尾加-th构成fourth, tenth特殊的无规律，需要特殊记忆one first, two second, three third, five fifth, nine ninth, twelve twelfth以y结尾的单词要先变y为ie，再加-th thirty thirtieth, fifty fiftieth 以one， two和three等结尾的多位数词要将个位数变成序数词twenty-one twenty-first,one hundred and oneone hundred and first名师点拨巧记基数词1至12分别记，13至19都带-teen，整十后缀要用-ty，连字符用于几十几，百位以上and连，拼法特殊的要注意。
经典提炼请写出下列数字的序数词形式。
英语语法复习：数词课件 (共15张PPT)
知识讲解
序数词
把1－99的序数词也分为四个类： 1. 第一类 first (1st), second (2nd), third (3rd) 这类序数词只有三个，在整个序数词里面是特殊的，需要逐个地硬记下来。 在括号里的是缩写形式，均在阿拉伯数字后面加上相应序数词的最后两个字 母构成，以下各类与此相同。
知识讲解
基数词
4. 第四类： 这一类词可以看成是一种合成词，其结构方式是：用十位整数加上个位整数， 其间用连字符号“－”连接，表示“几十几”。这类基数词的变化是规则的。 twenty-one, forty-six, seventy-eight, ninety-five
知识讲解
基数词
用作基数词单位的 hundred, thousand, million, billion 通常不带复数词尾-s，但 若用于表示数百、数千、数百万这样的泛指，则用复数。 200 two hundred 3,200 three thousand and two hundred 1, 526,200 one million, five hundred and twenty-six thousand and two hundred thousands of billions of
知识讲解
基数词
把100以内的基数词分为四类： 1. 第一类：
one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve 这一类共计十二个单词，在结构上与其他的基数词相比较是特殊的，这些词 对学好其他的基数词和序数词都是及其重要的。
知识讲解
序数词
4. 第四类 thirty-first (31th)，sixty-second (62nd)，eighty-seventh (87th) 这类表示“第几十几”的序数词，十位数不变，仅把个位 上的基数词变成序数词就可以了。
高中语法专题之数词(有答案)
20÷4＝5：Twenty divided by four is five.Four into twenty goes five.（七）. 约数、不定数量词“多”的表示法列表约数表示法列表含义英语表达例句大于某数more than He has lived here for more than twenty years.over she is over fifty.or more There' re thirty people or more in the meeting-room.小于某数less than I have less than (not more than )fifty dollars.under Children under seven are not allowed to enter.below He would not sell it for below a hundred fifty dollars.or less The coat might cost him sixty dollars or less.大约（某数）nearly She is nearly fifty now.almost Its almost three o'clock.up to Up to ten men c an sleep in this tent.or He spent four or five days writing the article.or so The distance is twenty miles or so.about I visited that village about three years ago.some Their team has some four or five players.more or less The container can hold more or less twenty pounds of water.around/round Let's make it round/around eight o'clock.不定数量词“多”的表示法列表被修饰名词的数英语表达汉译修饰可数名词几十、许多修饰不可数名词许多、大量31.It is not rare in ___that people in ____fifties are going to university for further education.A.90s,theB. the 90s, /C.90s, theirD. the 90s, their32.-Have you seen many sheep in the distance ? -Yes, ___.A. thousand of themB. two thousands of themC. two thousand of themD. two thousand them5．A 这里"first"有人说起副词作用，可以看成表语，也可以看做一种"取得第一名"的习惯用法。
中考英语语法专题之数词分类讲练(共30张ppt)
5） 序数词还可作副词，此时不用任何冠词。
First I am short of money; second I haven’t enough time. 首先我缺钱，其次我没有足够的时间。
6） 序数词用在表示“每隔……”的every 后，其前不用冠词。
every second day 每隔一天
every fifth day 每隔四天
3） 序数词前有形容词性物主代词、名词所有格或其他修饰语时不用任何冠词。 My first five years of childhood was spent with my grandparents. 我五岁前是和祖父母一块度过的。 Mrs. Bnius. 布莱克夫人的第二个孩子是个天才。 4） 序数词与名词构成复合形容词时，冠词由被修饰词而定。此时序数词是复合形容词的 一部分而不是独立的，前面的冠词完全由这个形容词所修饰的名词而定。 This MPV car is a second-hand one. 这辆商务车是二手的。 Habit is second nature. 习惯是第二天性。
3、 序数词前冠词的使用 1） 明确指明了先后顺序或一系列事物按一定的规律排列时，序数词前用定冠词。 This is the second time that I have been in London. 这是我第二次来伦敦。 Alva is the fifth child of the Whites. 阿尔瓦市怀特家的第五个孩子。 3、 序数词前冠词的使用 1） 明确指明了先后顺序或一系列事物按一定的规律排列时，序数词前用定冠词。 This is the second time that I have been in London. 这是我第二次来伦敦。 Alva is the fifth child of the Whites. 阿尔瓦市怀特家的第五个孩子。
中考英语语法知识专题(4)数词ppt课件(含答案)
five o’clock 5：00 twenty-five past six 6：25 half past six 6：30 a quarter to seven 6：45 ten to seven 6：50
几点过几分
分钟数≤30分
几点差几分
分钟数≥30分
5
(五)英语中加、减、乘、除表达法(等号是equals/is) 算法 加法 加、减、乘、除号 加号是and/plus 例句
twice两倍 两倍用twice，三倍及以上用times three times三倍 four times四倍 点 “.”用point one point six 1.6 fifty percent 50%
4
小数
百分数
百分号“%”用percent
(四)时刻表达法(过past，差to读法)
整点
数词后加o’clock
Don’t worry. There is still one and a half hours/one hour and a half left now.
10
考点一
基数词 C) C．Class Three
1．(2016·中考改编)—Which class won the match in the end? —I'm not quite sure.Perhaps________did.( A．Class Third B．Third Class
for a visit during holidays.( B )
A．thousand C．five thousands 3 ． (2016· 中考改编 )Now ， everybody ， please turn to Page________and look at the________picture.( B ) B．thousands of
英语数词语法
1,000,000 a million
1000 a/one thousand
10,000,000 ten million
10,000 ten thousand
100,000,000 a hundred million
100,000 a hundred thousand trillion 万亿
在100以上的数中，hundred之后加and
九百八十二亿六千零八万九千七百三十一
98260089731 98,260,089,731
98 billion 2 hundred and 60 million 89 thousand 7 hundred and31
二 序数词
1. 表示第1-3： first ，second， third 2. 表示第4-19
20-90：十位数的整数后加“ty” 12 twelve——20 twenty 13 thirteen——30 thirty 14 fourteen—— 40 forty
4. 几十几
①orty three
5. 百位词记以上
100 a/one hundred
第21 twenty + first = twenty first
第32
thirty second
5. 第100及以上
（1）整数词： 在其相应的基数词后加th
第100： hundredth 第1000： thousandth 第1,000,000： millionth
（2）非整数：保留相应的基数词部分， 但对应的个位要用序数词
fourth fifth sixth seventh eighth
ninth
tenth elevent twelfth h
小学英语语法专题训练：数词(含答案)
小学英语语法专题训练：数词一、单选题（共28题）1.This city has got seven ________ people.A. millionB. millionsC. millions of2.I think ten hundred is a ______ .A. thousandB. millionC. kilometre3.There are chickens in the photo.A. aB. oneC. three4.There are twenty-five in the class.A. childB. childrenC. girl5.There weren't buses.A. someB. anyC. one6.three × four =A. elevenB. sevenC. twelve7.one + eight =A. nineB. sixC. seven8.nine - six =A. fiveB. threeC. six9.seven - two =A. fiveB. nineC. four10.— How many pandas are there?— There are pandas.A. oneB. threeC. a11.Two and is seven.A. sixB. fiveC. four12.ten ÷ five =A. fourB. twoC. five13.Nine and three is ______.A. elevenB. twelveC. six14.One, two, three, ______, five.A. fourB. oneC. five15.________________ I write the name of a friend.A. WellB. OnceC. OneD. First16.Children's Day is on the of June.A. firstB. secondC. thirdD. fourth17.Our art room is on the ___________floor.A. oneB. twoC. second18.New Year is on ________ day of January.A. oneB. firstC. the first19.Thursday is his _____________________ birthday.A. elevenB. eleventhC. eleven's20.I can see thirteen _______.A. kiteB. a kiteC. kites21.______plates?A. AB. someC. Six22._________ peas lived together in a pod.A. fiveB. FifthC. Five23.Jenny came _____ in the game.A. oneB. secondC. firstly24.Look at that book. There are ________ words in it.A. three hundredB. three hundredsC. three thousands25.He is 1.6 tall. He is than this desk.A. meter; tallB. meters; tallC. meters; taller26.Now there are only about ________ pandas in the wild.A. one thousand and six hundredsB. one thousand six hundredC. one thousand and six hundred27.There are ________ girls in our school.A. nine hundredsB. nine hundred forty oneC. nine hundred and forty-one28.Tomorrow is my ______________ birthday. My parents will buy a big cake for me.A. twelveB. twentyC. twelfth二、选词填空（词汇运用）（共2题；共2分）29.The Great Wall is about twenty________ (thousand/thousands) kilometres.30.It was the ________ (first/one) time for me.三、语法填空（共16题；共17分）31.There are two________ (library) in our school.32.I have three________ (pen friend) from the US.33.Our music room is on the ________(one) floor.34.There are ________(third) computer rooms in my school.35.There are twenty________ (child) in the class.36.The music room is on the ________ (two) floor.37.It's our ________ (one) spaceship.38.It is more than two________ （thousand）years old.39.My bedroom is on the ________ (two) floor.40.May is the________(five) month of a year.41.The ________(three) day, we went to the Great Wall.42.Are you going to eat or play with the toys________(one)?43.Our classroom is on the ________ (three) floor.44.The ________ (two) and the ________ (one) peas want to fly to the sun.45.Miss Liu is on the ________ (three) floor.46.I live on the________ (nine) floor of the building.四、填空题（共2题；共10分）47.算一算，将正确答案写在横线上（1）three × five = ________（2）________ + four = eighteen（3）ten + ten = ________（4）six + seven = ________（5）ten - ________ = eight48.看图，读单词写数字例：cow 1（1）cat ________（2）pig ________（3）sheep ________（4）duck ________（5）bird ________五、匹配题（共2题；共10分）49.读一读，加一加，减一减。
英语语法 数词 练习题 (含答案)
一、选择正确的选项。
1We don't have enough nurses to look after the patients.At least___are needed.A.ten another nursesB.more ten nursesC.other ten nursesD.another ten nurses2It's said that_____of the water around the world____polluted.A.two third;hasB.two thirds;haveC.two third;areD.two thirds;is 3There are______months in a year.October is the______month.A.twelve;tenB.twelfth;tenthC.twelve;tenthD.twelfth;ten4-Have you seen the CCTV news on TV?-Yes，_____children had a good festival on the_____Children's Day.lions of;sixtyB.len million;sixtylions of;sixtiethD.ten millions;sixtieth5Father's Day is on______Sunday of June.A.threeB.thirdC.the third6-“Food Safety"has become one of the hottest topics recently.-Yeah,it receives_________Internet hits(点击)a day.A.thousandsB.thousand ofC.thousands ofD.ten thousands7About______of the workers in the factory were born in the_______.A.two thirds;1970B.two thirds;1970sC.two third;1970D.two third;1970s8It is five years since we began to enjoy______spring holiday each year.A.ten-dayB.ten dayC.ten day'sD.ten-days二、单选1.-How was your weekend?-Great!It was my grandfather's___birthday.We enjoyed ourselves. A.seventy B.seventiethC.the seventiethD.seventeenth2.-I hear your friend is visiting SanYa again.Is it the second time for him? -Yes,and he will come for_____time next springA.a thirdB.a secondC.the third3.It is reported that people throw______plastic bags along this street every day.A.hundredB.hundredsC.hundred ofD.hundreds of4.Some scientists think that it will take_____of years to make robots do most work for humans.A.hundredsB.hundredC.thousand5.-If a=4,b=5,what's the answer to the question“a+2ab+1=?”-______.A.Forty-fifthB.Forty-fiveC.Twenty-threeD.One hundred and twenty-one6.-How was your day off yesterday?-Perfect!It was___birthday of my grandma's.We had a big family celebration.A.eightyB.the eightiethC.eightieth7.-Good news!Bill won______medal in the long jump just now.-Really?That's his______one at our sports meeting.A.a;fourB.an;fourthC.a;fourth8.-____will your brother be back?-I’m not sure,maybe in____A.How soon;one hour and halfB.How soon;one hour and a halfC.How long;one and half hoursD.How long;one and a half hours9.-There is a wrong word in line______-Where?-In the___line.A.two;twoB.two;secondC.second;twoD.second;second10._____of the students in our class________money to the disabled people these daysA.Two third;have raisedB.Two thirds;has raisedC.Two three;have raisedD.Two thirds;have raised11.The work is too difficult for Mr.Zhu to finish in a week.He needs_______ days.A.more twoB.two moreC.two anotherD.another more12.It is reported that_____people in the world are suffering from the H1N1 flu.A.several thousands ofB.ten thousandsC.thousands ofD.thousands13.___is Teacher's Day in China.A.The September tenthB.Ten of SeptemberC.September the tenthD.Tenth September14.He is_____in our class.A.the fourth tallestB.fourth tallestC.four tallestD.the four tallest15.The road is over__metres long.A.six hundred and fifty-twoB.six hundreds and fifty-twoC.six hundred,fifty-twoD.six hundred,fifty and two16.Kate lives in___.Mine is next to hers.A.the room fiveB.Room FiveC.five room17.My school isn't far from here.It's only____walk.A.fifteen minutesB.fifteen minutesC.fifteen minute's18.People often live a hard life____A.in the fortyB.in the fortiesC.in fortyD.on forties19.We all think that the_____century will bring us more hopes.A.twenty-firstB.twentieth-firstC.twenty-oneD.twentieth-one20._____the students usually surf on the Intemet and get information.A.60percents ofB.60percentC.60percent ofD.60percents21.The low temperature will be minus5℃.The underlined part means_____.A.5℃B.-5℃C.0.5℃D.<5℃三、单选1—What should we do now,Mr.Clark?—Please turn to Page_____and look at the_____picture.A.Twelve;fifthB.Twelfth;fifthC.Twelve;fiveD.Twelfth;five2.Mother’s Day is on the___________Sunday in May every year.A.twoB.secondC.sixD.sixth3.We planted trees last year.A.hundreds ofB.hundred ofC.five hundredsD.five hundred of4..—Excuse me,sir.Here’s a package for Lin Tao.Which room does he live in?—_____________.A.308RoomB.Room308C.The Room308D.The308Room5.To finish the task,we’re tried three times,and after dinner we’ll try _____time.A.the fourthB.a fourthC.fourthD.four6.It’s said that______of the water around the world______polluted.A.two third;hasB.two thirds;haveC.two third;areD.two thirds;is7.of our classmates are good at basketball.A.Three quartersB.Three fourthC.third four8.The earthquake in Ya’an left_______people homeless.A.two thousandsB.thousands ofC.two thousands ofD.two thousand of9.Amy will have her birthday next Friday.A.twelveB.twelfthC.the twelfth10.My mother bought me a sweater for my________birthday.A.twelfthB.twelveC.the twelfth11.There are______people in the zoo on Children’s Day.A.one hundredsB.two hundreds ofC.hundreds ofD.hundred of12.Boys and girls，please turn to Page and look at the picture．A．Fifth；five B．Five；fiveC．Fifth；fifth D．Five；fifth13.Kate is a schoolgirl．She got many presents on her birthday．A．nine B．the ninth C．ninetieth D．ninth14.It’s reported that over eight people lost their lives in theearthquake in Nepal this year．A．thousand B．thousandsC．thousand of D．thousands of15.December is and last month of a year．A．the twelfth B．twelfth C．the twelve16.Tony's mum looks young and beautiful．It’s hard to imagine she is alreadyin her．A．fifties B．fifty C．fiftieths D.fiftieth 17.—How many friends will come to your______birthday party?—About______.A．fifteen；fifteen B．fifteenth；fifteenthC．fifteen；fifteenth D．fifteenth；fifteen18.The teacher was very angry because the boy made mistakes in hishomework．A．one B．fifth C．five19.—This is the time that I come to Paris．I have been here twice．—Me too．The world is so large that I want to see more of it．A．first B．second C.three D．third20.of the land in that district is covered with trees and grass．A．Fifth-two B．Two-fifthC．Fifth-second D．Two-fifthsst year，three hundred English teachers took part in the English training．A．two-month B．two-monthsC．two-months D．two-month22.—What's five and seven?—It's．A．twelve B．twenty C．thirty-five23.—How many American students came to visit your school yesterday?—Nine．Five are from New York，and the other are from Boston．A．two B．three C．four D．five24.of the girls will join in the Summer Camp to visit England．A．Three-fives B．Third-fifths C．Three-fifths25.During the May Day holiday，we stayed in a mountain village with__________trees around．A．thousand of B．thousandC．thousands D．thousands of26.It is said that students like to talk with friends online．A．two-thirds B．two-three C．two-third27.Two students to the opening ceremony last Friday．A．hundreds；were invited B．hundred：were invitedC．hundreds of；invited D．hundred of；invited28.Rose received a letter full of love from her parents on her __________birthday．A．sixteen B．sixteen's C．sixteenth D．sixteenths 29.people died because of the earthquake．A．Two thousands B．Thousand ofC．Two thousands of D．Thousands of30.No way!I don’t think should be allowed to drive．I am worriedabout your safety．A.fifteen years oldB.fifteen-year-old C．fifteen-year-olds一、1-4:DDCC5-8:CCBA二、1-5:BADAB6-10:BCBBD11-15:BCCAA16-20:BCBAC21-25:BBABB三、1-5:ABABB6-10:DABBA11-15:CDDAA16-20:ADCDD21-25:AACCD 26-30:ABCDB。
初中英语语法专题复习之数词语法讲义
初中英语语法专题复习之数词语法英语数词语法是英语学习中非常重要的一部分，它涉及到数字的读法、写法以及数词的分类和使用。
在学习英语数词语法时，我们需要掌握基本的数词分类、基数词和序数词的用法，以及数词的单位和表示数量的单词。
一、英语数词的分类英语数词可以分为基数词和序数词两类。
基数词:表示数目多少的数词叫基数词，例如:“one”、“two”、“three”等。
基数词一般是单数形式，但以下情况，常用复数:a、与of短语连用，表示概数，不能与详细数目连用，如scores of。
序数词:表示顺序的数词叫序数词，例如:“first”、“second”、“third”等。
序数词一般是以-th结尾的形容词或名词的形式，例如“first”就是“第一”，“second”就是“第二”。
需要注意的是，有些数词既可以作为基数词，也可以作为序数词使用，例如“ten”可以作为基数词“ten”和序数词“tenth”使用。
另外，有些数词既可以表示数量，也可以表示顺序，例如“three”既可以表示“三个”，也可以表示“第三天”。
二、英语数词的用法英语数词在使用时有以下用法:表示数量:基数词可以表示数量的多少，例如:“one”表示“一个”，“two”表示“两个”，“three”表示“三个”等。
表示顺序:序数词可以表示顺序，例如:“first”表示“第一”，“second”表示“第二”，“third”表示“第三”等。
表示倍数:可以用基数词的倍数形式来表示倍数，例如:“two times”表示“两倍”，“three times”表示“三倍”等。
表示约数:可以用基数词的约数形式来表示约数，例如:“ten”表示“十个”，“twenty”表示“二十个”等。
表示价格:可以用基数词来表示价格，例如:“one dollar”表示“一美元”。
表示距离:可以用序数词来表示距离，例如:“fifth floor”表示“第五层”。
表示时数:可以用序数词来表示小时数，例如:“sixth hour”表示“第六小时”。
英语语法复习之数词
四ห้องสมุดไป่ตู้年、月、日、年代的表达
• 1) 年、月、日的表达 a.月份表达法 月份前用in，月份名称第一个字母须大写。 in January(in Jan.) in May. in September (in Sept.) in December(in Dec.) b.日期表达法 用序数词表示，前面加the，在某日前用介词on。 on the first 在一日 on the thirtieth在三十日 c. 某年某月某日表达法 • in October,1949 on October 1,1949 May 1(st)(May the first)五月一日 Mar.5(th)(March the fifth)三月五日
• • • • • • •
4) 约数 a. 大约用about, nearly, some, around He is coming around five o’clock. b. 多于，超过 用over, more than The bridge is over 1500 meters long. c. 少于，不超过 用less than She is less than twenty years ago.
2）倍数的表达法 a. 倍数+ as...as • 倍数+as...as（意为“A是B的几倍”，多用于对 客观事物的比较。） • Asia is four times as large as Europe.亚洲有欧洲 的四倍大。 • This dictionary is twice as heavy as that one.这 本字典有那本字典的两倍重 b. 倍数+比较级形式+than • 倍数+（形容词/副词）比较级形式+than，意为“ 增加（多）几倍”。 • This type of car uses three times more petrol than that type does.这种汽车比那种汽车的耗油 多三倍。 • The house is twice larger than that one.这间房子 比那间大两倍。
高考英语语法专题板块2第1讲名词和数词
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剖析考点·语法突破 高效训练·跟踪检测
例词
sons-in-law女婿； passers-by过路人； story-tellers讲故事的人； go-betweens中间人； grown-ups成年人
第1讲 名词和数词
2．名词复数的不规则变化
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剖析考点·语法突破 高效训练·跟踪检测
变化情况 特殊变化
抽象名词意义 骄傲 震惊 高兴 惊奇 快乐
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剖析考点·语法突破 高效训练·跟踪检测
具体化名词意义 令人骄傲的事情 令人震惊的事情 令人高兴的事情 令人惊奇的事情 令人快乐的事情
第1讲 名词和数词
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剖析考点·语法突破 高效训练·跟踪检测
3．物质名词的复数现象 (1)有些物质名词用复数形式表示与原来不同的事物。 paper(纸)→papers(证件；论文) custom(风俗习惯)→customs(海关) arm(胳膊)→arms(武器；装备) air(空气)→airs(摆架子；装腔作势)
第1讲 名词和数词
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剖析考点·语法突破 高效训练·跟踪检测
(2)有些物质名词用复数形式表示由大量该物质组成的事物。 sand(沙子)→sands(沙滩；沙漠) water(水)→waters(水域；水体) time(时间)→times(时代) wood(木头，木材)→woods(树林) (3)有些物质名词用复数形式表示不同的种类，如food, wine, metal, fish, vegetable等。 The wines of France are among the best in the world． 法国的葡萄酒在世界上名列前茅。
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英语语法复习课件--数词
三.基数词的用法
1.
数词 (several)+
hundred thousand (表示具体数字) million billion
2. hundreds
thousands
(表示概数)
millions
+ of
billions
some / many hundreds of
1. — If a = 3, b=4, what’s the answer to the problem, a+2ab+1= — the answer is___. A. twenty eight B. twenty-eighth C. twenty-eight
四.数词的表示法 — 半的表示法
一个半小时 one and a half hours = one hour and a half
两个半小时 two and a half hours = two hours and a half
1. The boy always stays there for __. A. one and half hour B. one and a half hour C. one and a half hours
be + 数词 + 量词 + 形容词
2. The city changed a lot ___. A. in 1980s B. in the 1980s C. in the 1980
3. He graduated in __ of __ century. A. the sixtieth; twenty B. sixty; the twentieth C. the sixties; the twentieth
高考英语语法考点归纳总结数词素材
高考英语语法考点归纳总结：高考英语语法：数词一.基数词: 表示数目的数词1.两位数: 几十和个位数之间加连词号, 如: twenty-three, forty-seven, ninety-six2.三位数的读法: 第一个数字+hundred + and +后面的一位或两位数字, 如: 101读作one hundred and one, 864读作eight hundred and sixty-four3.四位数和四位以上数字的读法: 阿拉伯数字每三位为一段, 从后往前用逗号分开, 每个逗号处所用的数词分别为: thousand, million, billion, 如: 21,634,755读作twenty-one million six hundred and thirty-four thousand seven hundred and fifty-five. 注意: 读这样的数时, 只在hundred一词后加and4.hundred, thousand, million, billion表示具体数目时都不用复数形式, 但它们的复数形式可以用于一些词组中, 如: hundreds of, thousands of, m illions of, billions of.5.数词dozen, score的用法与hundred, thousand等相同二.序数词: 表示数目顺序的词1.序数词一般是由基数词加th构成, 序数词前一定要加the, 如: the seventh, the thirteenth, the one hundredth2.以y结尾的基数词构成序数词时, 先把y变为i, 再加eth, 如: the twentieth, the fortieth, the fiftieth, the eightieth3.大于二十的基数词对应的序数词, 只将末位数变为序数词, 前面的其他位数仍用基数词, 如: 第532读作five hundred and thirty-second4.不规则的序数词如下: the first, the second, the third, the fifth, the eighth, the ninth, the twelfth三.数词的用法:1.编号的事物可用序数词或基数词加名词构成, 如: the fourth lesson =lesson four, the fifteen th page =page fifteen, the ninth part =part nine2.编号的事物若数字较大, 一般用基数词放在名词后面来表示, 名词前一般不用定冠词, 如: room 302, page 215, No. 101 middle school3.在表示年月日时, 年用基数词, 日用序数词, 年的读法是, 从后往前, 将年份分成两位一段, 依次读出每一段即可, 如: April 5,1976 读作April (the) fifth, nineteen seventy-six; October 1, 1949读作October t he first, nineteen forty-nine; 年份1905读作nineteen hundred and five; 年份1800读作eighteen hundred; 年份2000读作year two thousand; 年份502 B.C.读作five o two B C; 年份A.D. 620读作six twenty A D4.表示时间时用基数词:①.表示几点整的说法: It is five (o’clock)②.表示几点过几分的说法: 若不超过30分钟, 用past表示过几分; 若超过30分钟, 用to表示差多少分到几点, 如: 3:05 =five past three, 5:20 =twenty past five; 8:35 =twenty-five to nine; 12:50 =ten to one③.表示几刻钟的说法, 如: a quarter, three quarters④.表示上午,下午某时间, 如: 8:00 a.m., 4:15 p.m.⑤.时刻也用24小时制读法, 只须依次读出点钟数和分钟数, 整点钟时, 需在最后加读hundred ( hours), 如: 18:45读作eighteen forty-fiv e, 18:00读作eighteen hundred ( hours ), 以上提到的3:05, 5:20, 8:35分别也可读作three five, five twenty, eight thirty-five5.表示加减乘除的说法: 数学运算的加减乘分别用plus, minus, times, divided by 表示a. How much is fifteen plus two?b. How much is eight minus seven?c. How much is twelve times twelve?d. How much is eighty-one divided by nine?e. Five plus three is / equals eight.f. Five minus three equals / leaves two.g. Five times three makes / is fifteen.h. Fifteen divided by three equals five.十五除以三等于五6.表示倍数的说法:a. This room is three times bigger than that one.b. The dictionary is four times thicker than that book.c. The earth is 49 times the size of the moo n.7.表示百分比的说法: 基数词+ percent8.有些基数词可以构成固定词组, 如: one by one, twos and threes三三两两9.基数词可以与度量单位连用: twenty meters deep, ten meters long, one hundred yards10.分数的表示法: 分子用基数词, 分母用序数词, 若分子大于1, 则分母用序数词的复数形式, 如: one third, two tenths, two thirds. 有些分数可以用half, quarter表示, 如: three quarters11.小数: 小数点读作point, 小数点前面的数字读作一个完整的基数词, 小数点后面的每位数字依次用基数词读出, 如: 3.4读作three point four, 0.2读作zero point two, 8.97读作eight point nine seven12.某些数字的读法与写法, 如: $10.20读作ten dolla rs and twenty cents; 35Ｏ读作thirty-five degree; -20Ｏ读作twenty degree below zero或minus twenty degree; Napoleon III读作Napoleon the third; World War II读作World War two或the second world war.13.年龄的表示方法:a. The boy is ten years old.b. The boy is at the age of ten.c. He is a ten-year-old boy.d. The boy is of ten years.14. in one’s + 整十数的复数形式, 表示在某人几十多岁的时候, 如:a. He became famous in his thirties.15. in the 1930s / 1930’s表示在二十世纪三十年代16. 序数词前一般要用the, 但表示又一,再一的概念时, 序数词前也可以用a / ana. They plan to buy a second house. 他们计划再买第二房子四.选择使用数字或文字表示数的场合:1.一般来说, 两位数以内的数目用文字表示, 超过两位数的数目用数字, 如:a. There are forty-five students in our class.b. There are about 2,100 students in our school.2.在句首的数目多用文字表示:a. One hundred and two voters are against the project.3.基数词的复数形式多用文字表示:a. There are three twos in six. 6之内有三个2.b. He became famous in his fifties.2.在句首的数目多用文字表示:a. One hundred and two voters are against the pr oject.3.基数词的复数形式多用文字表示:a. There are three twos in six. 6之内有三个2.b. He became famous in his fifties。
英语语法1205--数词
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英语语法--数词-序数词
序数词：表示顺序的词称为序数词。
注：通常前面要加定冠词 the；但出现不定冠词a或an时，则表示“再—”，“又— ”。 We'll go over it a second time． We've tried it three times．Must we try it a fourth time? 另外，基数词也可以表示顺序。 the first lesson——Lesson One the fifth page——Page 5（five） the twenty-first room——Room 21（twenty-one）
数词hundred,thousand,million,billion用来修饰名词，表示名词的多少，具体数字 直接修饰名词； 当表示“数以......计的”这样的不确切数时，要变复数并加上of，才能接名词。并 且在这些词前还可以加several,many等词进行修饰。 hundreds of 数以百计的
2. 年代用定冠词及基数词表示的世纪加十位整数的复数形式构成 在二十世纪三十年代 in the 1930„s（in the thirties of the twentieth century或 in the nineteen thirties ） 在十九世纪六十年代 in the 1860‟s（in the sixties of the 19th century或 in the eighteen sixties）
E．序数词的句法功能：序数词在句中可作主语、宾语、定语和表语。
The second is what I really need．（作主语） He choose the second．（作宾语） We are to carry out the first plan．（作定语） She is the second in our class．（作表语）
英语语法数词专题
数词用法专题1.百位数和十位数之间;在英式英语中要用“and”连接;在美式英语中一般不用..例：456：four hundred and fifty-six2.3.有关“零”的各种说法：zero：一般说法;在温度或数学上使用；nil/nothing：在运动比赛中使用；love：在网球比赛中专用；O读音：电话或数学用语；cipher：书面语;指符号而不指数目有时指温度..例：零下 10 度：ten degrees below zeroThe result of the match was 5:0.读作 five goals to nilThey won 3:0.读作 three to nothingOur team leads by 10:0 in the first tennis game.读作 ten loveDial 110.If you have no children; enter a cipher in the space on the form.The thermometer fell below cipher yesterday.4.在某些表示概数的习语中如“成百上千”、“成千上万”等;基数词后要加“-s”..例：thousands of studentsmillions of childrentens of thousands of people5.hundred of;thousand of;million of 等被 a few;some;several;many 等修饰;表示不确定数字时;用单复数形式均可..例：a few thousands of bookssome thousands of soldiers单用：some thousandsseveral hundreds of workers单用：several hundredmany millions of birds单用：many millions6.表示“多少人组成一组;几个一起”时;基数词要用复数形式..例：The students lined in fives.She counts them in eights.The guests came in twos.相当于 two by two/two and two7.“第一名”、“第二名”可用 first;second 表示;并且可用复数形式..例：几个第 1 名：several firsts3 个第 2 名：three seconds8.在“several/many/基数词 + dozen + 名词”结构中;dozen 使用单数形式..当名词前有修饰性成分时;dozen 和名词之间要用 of不可省略;即“several/many/基数词 + dozen + of + 修饰词 + 名词”;另外;score 的用法和 dozen 相同..例：several/many/six dozen eggsseveral/many/six dozen of white birdsseveral/many/six score eggsseveral/many/six score of white birdsI bought several dozen/score these desks. ×I bought several dozen/score of these desks. √9.“some dozens/scores of + 复数名词”结构表示“好几十;很多”..some dozen/scoreof + …表示“大约 12/20 个...”例：some dozens/scores of children几十个儿童some 表示“一些”;对含义无影响some dozen/score of children大约 12/20 个儿童some 表示“大约”;对含义有影响10.“a dozen + 复数名词”和“a score of + 复数名词”也可表示“很多”..例：I have been there a dozen times.I have been there a score of times.11.基数词可以表示书页、住所、房间、教室、邮政编码、电话号码等的编号..电话号码通常以两个数字读为一组;中间有个小停顿;但以三个数字读为一组的情况也属常见;尤其是当电话号码为六位数或六位数以上时..电话号码中两个重复的数字;常用 double..例：第 8 页：Page eightP. 8第 7 行：Line sevenL. 7唐宁街 10 号：No. 10 Downing Street第 301 房间：Room No. 301第 4 教室：Classroom No. 4邮政编码：223805读作：double six o; two three two; double eight12.罗列几个并列的名词时;前面的若干个名词前用“不定冠词 + 序数词”结构;最后一个名词前用“定冠词 + 序数词”结构..例：The old man has four daughters. One is a nurse; a second is a teacher; a third is a musician; and the fourth is a painter.13.2 倍：twice AmE: two times;double;duple;twofold;as …again as；3 倍：3times;triple;treble;threefold；4 倍：quadruple;4 times;fourfold；5 倍：5 times;fivefold；依此类推..①double 可作 n/v/adj/adv..②double/twice/three times/four times/…等表示倍数时;要放在定冠词、形容词形物主代词或名词所有格之前..③treble可作 v/adj;通常可以和 triple 互换;但有时只能用 triple;如 the triple alliance..Ref.P46<2>..例：You have paid twice/two times the usual price.You are twice/two times her/Jenny's age.Four is the double of two.double 作名词He doubled/trebled his income in 6 years.double/treble 作动词It is double the distance.double 作形容词The driver demanded double the usual fare.double 作副词Duple quantity of iron is needed for this project.The amount of alcohol in his blood was triple the legal maximum.They have produced twofold/threefold as many washers as they did last year.This river is as wider again as that one.He earns treble my salary.treble 作副词Treble salaries were paid.treble 作形容词I asked for a treble portion of wine.treble 作名词20 is the quadruple of 5.quadruple 作名词Sales have quadrupled in the last 5 years.quadruple 作动词A quadruple alliance comes into being.quadruple 作形容词This year we produced quadruple that of last year.quadruple 作副词14.倍数比较的表示法：1)X times as + adj/adv原级+ as ... Ref.P47<划线部分>例：My room is twice as long as hers.My room is half as long as hers.0.5 倍表示法My room is half as long again as hers.= My room is one and a half times as long as hers.1.5 倍表示法Jack runs 3 times as fast as Jim.They have twice as many planes as we have. 此句中是 n;不是 adj/adv2)X times + adj/adv比较级+ than …… Ref.P47<划线部分>例：My room is twice longer than hers. = My room is as long again as hers.My room is half longer than hers.0.5 倍表示法My room is one and a half times longer than hers.1.5 倍表示法 Jack runs 3 times faster than Jim.The cotton output is 20% greater than that of 2009.此句中是 20%;不是倍数3)X times + the width length; breadth; level; value; size; velocity of …例：My room is twice the length of hers.My room is half the length of hers.0.5 倍表示法My room is one and a half times the length of hers.1.5 倍表示法 The earth is 49 times the size of the moon.15.倍数增减的表示法：1)increase/exceed/speed up/step up/raise/rise/go up/grow/... + by + 百分数X%/倍数X；A 增加了 X% ‖ A 增加为原来的 X 倍例：Sales increased by 15%.The production of TV sets in the fourth quarter increase by 3 times.2) A be/multiply/increase/exceed/speed up/step up/raise/rise/go up/grow... +数词X + times/fold；A 是/增加为原来的 X 倍例：Sales increased 3 times.The production of notebooks computers has been increased sixfold over/as against/as compared with that of 2005.3) A multiply X times & A be multiplied by + 数字；A 增加为原来的 X 倍例：Sales have been multiplied by 4 times.The production has multiplied 8 times.4) A increase/exceed/speed up/step up/raise/rise/go up/grow/decrease/drop/fall/weaken/shorten/reduce/step down/speed down/go down + bya factor of + 百分数X%/数词X；A 增加/减少/...为原来的 X 倍例：Sales have increased/decreased by a factor of 5.The speed exceeded the average value by a factor of 4.It raised by an average factor of 30%.5) A decrease/drop/fall/weaken/shorten/reduce/step down/speed down/go down +by +百分数X%/数词X/倍数X；A 减少/下降/...了 X ‖ A 减少/下降/...为原来的 1/X例：Sales have decreased by 5;000 RMB/3 times.The price of rice was reduced by 15%.6) A 黄色部分/绿色部分 to ...；A 增加/减少到 ...例：Sales increased/decreased to 50 million.The soldiers have increased to 1;000.7) A be + 倍数X + upon/over B；A 是 B 的 X 倍例：Sales was 3 times upon/over that of last year.I am twice upon/over your age.The number of college students for 2010 is 30 times over that for 1995.8) A be + 倍数X + what 从句；A 是 ... 的 X 倍例：Sales are 4 times what we had for the first quarter.The population is more than 3 times what it was in 1985.9) A be + 百分数X% + above/higher than B；A 比 B 高 X%例：Sales are 40% above/higher than that of last month.The export this month was 23% above/higher than that was achieved in May.10)A be up + 倍数X；A 增加为原来的 X 倍例：Sales this month was up 6 times.His income this month was up 3 times.The nation's grain output was up 4.5 times.11)A show/register + 百分数X% + increase/decrease名词；A 增加/减少了 X%例：Sales in August registered/showed a 25% increase/decrease over March.12)A be + 百分数X%/数字X + less than B；A 比 B 少 X%例：Sales are 37% less than that of last month.The steel output this year is 10;000 tons less than in 2001.注：by 常可省略;但 to 则不可省略16.5 feet square 与 5 square feet 的区别：A table 5 feet square has an area of 25 square feet.17.“减少一半”的表示法：1)be half as many/much/long/fast/... as ...2)twice thinner than ...3)reduce/decrease/... by one half4)be one half less5)cut/break/split/... A in half/into halves6)half the usual price/speed/...18.概数的表示法：1)“over/above/more than + 数字”或“数字 + odd”2)below/under/less than + 数字3)“about/nearly/some/towards/more or less + 数字”或“数字 + or so”注：“数字 + more or less”和“more or less + 数字”等价4)其它零散表示法..Ref.P51-52<4>19.“每隔”和“每逢”的表示法：1)“every + 基数词 + 复数名词”=“every + 序数词 + 单数名词”例：every 5 days = every 5th day每 5 天 = 每隔 4 天2)“每两天/每隔一天”的表示法：every 2 days = every 2nd day = every other day20.比例的表示法：Ref.P52-53<六>注：1 person in 10 = 1 person out of 10 = 1 in every 10 person21.数学公式、小数和分数等的表示法：Ref.P53-54<七>22.长度、面积、重量和体积的表示法：Ref.P54-55<八>23.英美楼层的不同表示法：Ref.P55-56<九>1)floor 表示“楼层”时;指的是“第几层”常与 on 连用；而 story 表示“楼层”时;指的是“层数”此时等同于 storey;并常与基数词连用或参与构成复合词;不与on 连用..另外;storeyed 是形容词;意为“有...层楼的”;常参与构成复合词..2) a 4-story house = a 4-storied house24.币制的表示法：Ref.P55-56<十>25.年代、年月等的表示法：Ref.P56<十一>26.年龄的表示法：1)大概年龄：Ref.P56<1>2)“... 岁”：Ref.P56<2>3)“快 ... 岁”：Ref.P57<3>4)“已 ... 岁”：Ref.P57<4>5)“不满 ... 岁”：Ref.P57<5>6)其它年龄的表示法：be/come of age <成年>; be under age <未成年>; be of schoolage <已到学龄>; be over age <超龄>; be far advanced in years <年迈>; attain the advanced age of < ... 岁的高龄>; long-lived/live to a great age <长寿>;live to 90 <活到 90 岁> 等27.时刻的表示法：1)用 a.m./p.m. 后便不能再用 o'clock；例：at 7 o'clock a.m. <×>2) a.m./p.m. 前用数字;不用文字表示时刻；例：8:15 a.m. <√>；a quarter past eight a.m. <×>3)不说出钟点时不能用 a.m./p.m.；例：tomorrow p.m. <×>；tomorrow afternoon <√>4) a.m./p.m. 在标题、句子开头或时间表中用大写的 A.M./P.M.；电报用语为 A. 和P.5)past过和 to差一般限制在 30 分钟内；6)零点：zero hours; O hundred hours28.用阿拉伯数字表示复数名词时;阿拉伯数字后加“s”或“'s”..29.数词构成的惯用语：Ref.P57-58<4>30.数词的限定语：1)表示“大约、左右”：about; some; around; round; or so; in the rough; in theneighbourhood of; close to; more or less; round about; or thereabouts;somewhere about2)表示“恰好、整整”：exactly; clear; cool; just; sharp; flat; solid; good; whole;neither more or less3)表示“仅仅、只不过”：only; scarcely; barely; scant; no more than4)表示“过剩、外加”：over; more; left; other; another5)表示“接近”：near; close to; towards; nearly; almost6)表示“少于、不足”：less; under; less than; below; off; short; within7)表示“多于、以上”：over; past; odd; good; full; upwards of; no less than;more than; all of注：or so; in the rough; left; over; flat 等一般要放在“数词 + 名词”之后；另外;对于 two hours; five months; three years 等表示整体概念时;形容词须放在它们的前面..31.“基数词 + 名词”和“基数词 + 名词-ed”的区别：它们均可参与构成复合形容词中间均需加连字符作前置定语;均不可置于名词后或作表语;但“基数词 + 名词”强调数量;而“基数词 + 名词-ed”则强调特点..注：“数词 + 名词 + 形容词”也是常用的复合形容词;其用法与上述基本相同..需要说明的是;当不使用连字符且数词 > 1 时;名词使用复数形式..32.half 的用法：Ref.P60-61<十二>33.a fall of snow ——英语量词表示法：Ref.P62-63<十三>。
中考英语语法——数词课件(56张PPT)
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9、要学生做的事，教职员躬亲共做； 要学生 学的知 识，教 职员躬 亲共学 ；要学 生守的 规则， 教职员 躬亲共 守。2021/8/92021/8/9Monday, August 09, 2021
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10、阅读一切好书如同和过去最杰出 的人谈 话。2021/8/92021/8/92021/8/98/9/2021 12:15:30 AM
13、He who seize the right moment, is the right man.谁把握机遇，谁就心想事成 。2021/8/92021/8/92021/8/92021/8/98/9/2021
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14、谁要是自己还没有发展培养和教 育好， 他就不 能发展 培养和 教育别 人。2021年8月 9日星 期一2021/8/92021/8/92021/8/9
中考链接
1)People often live a hard life___B______ . A.in the forty B. in the forties C. in forty D. on forties
序数词
定义：表示顺序的词。 e.g. first、second、third…
序数词的构成：
719 seven hundred and nineteen
1,020
one thousand and twenty
1,657
one thousand six hundred and fifty-seven
1,248,000
one million two hundred and forty-eight thousand
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11、一个好的教师，是一个懂得心理 学和教 育学的 人。2021/8/92021/8/92021/8/9Aug-219-Aug-21
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英语语法数词专题Company Document number：WUUT-WUUY-WBBGB-BWYTT-1982GT数词用法专题1.百位数和十位数之间，在英式英语中要用“and”连接，在美式英语中一般不用。
例：456：four hundred (and) fifty-six2.3.有关“零”的各种说法：zero：一般说法，在温度或数学上使用；nil/nothing：在运动比赛中使用；love：在网球比赛中专用；O（读音）：电话或数学用语；cipher：书面语，指符号而不指数目（有时指温度）。
例：零下 10 度：ten degrees below zeroThe result of the match was 5:0.（读作 five (goals to) nil）They won 3:0.（读作 three (to) nothing）Our team leads by 10:0 in the first tennis game.（读作 ten love）Dial 110.If you have no children, enter a cipher in the space on the form.The thermometer fell below cipher yesterday.4.在某些表示概数的习语中（如“成百上千”、“成千上万”等），基数词后要加“-s”。
例：thousands of studentsmillions of childrentens of thousands of people5.hundred of，thousand of，million of 等被 a few，some，several，many 等修饰，表示不确定数字时，用单复数形式均可。
例：a few thousand(s) of bookssome thousand(s) of soldiers（单用：some thousands）several hundred(s) of workers（单用：several hundred）many million(s) of birds（单用：many millions）6.表示“多少人组成一组，几个一起”时，基数词要用复数形式。
例：The students lined in fives.She counts them in eights.The guests came in twos.（相当于 two by two/two and two）7.“第一名”、“第二名”可用 first，second 表示，并且可用复数形式。
例：几个第 1 名：several firsts3 个第 2 名：three seconds8.在“several/many/基数词 + dozen + 名词”结构中，dozen 使用单数形式。
（当名词前有修饰性成分时，dozen 和名词之间要用 of（不可省略），即“several/many/基数词 + dozen + of + 修饰词 + 名词”，另外，score 的用法和 dozen 相同。
）例：several/many/six dozen eggsseveral/many/six dozen of white birdsseveral/many/six score eggsseveral/many/six score of white birdsI bought several dozen/score these desks. (×)I bought several dozen/score of these desks. (√)9.“(some) dozens/scores of + 复数名词”结构表示“好几十，很多”。
（some dozen/score (of) + …表示“大约 12/20 个...”）例：(some) dozens/scores of children几十个儿童（some 表示“一些”，对含义无影响）some dozen/score (of) children大约 12/20 个儿童（some 表示“大约”，对含义有影响）10.“a dozen + 复数名词”和“a score of + 复数名词”也可表示“很多”。
例：I have been there a dozen times.I have been there a score of times.11.基数词可以表示书页、住所、房间、教室、邮政编码、电话号码等的编号。
（电话号码通常以两个数字读为一组，中间有个小停顿，但以三个数字读为一组的情况也属常见，尤其是当电话号码为六位数或六位数以上时。
电话号码中两个重复的数字，常用 double。
）例：第 8 页：Page eight（P. 8）第 7 行：Line seven（L. 7）唐宁街 10 号：No. 10 Downing Street第 301 房间：Room (No.) 301第 4 教室：Classroom (No.) 4邮政编码：223805（读作：double six o, two three two, double eight）12.罗列几个并列的名词时，前面的若干个名词前用“不定冠词 + 序数词”结构，最后一个名词前用“定冠词 + 序数词”结构。
例：The old man has four daughters. One is a nurse, a second is a teacher, a third is a musician, and the fourth is a painter.13.2 倍：twice (AmE: two times)，double，duple，twofold，as … again as；3 倍：3 times，triple，treble，threefold；4 倍：quadruple，4 times，fourfold；5 倍：5 times，fivefold；依此类推。
（①double 可作 n/v/adj/adv。
②double/twice/three times/four times/…等表示倍数时，要放在定冠词、形容词形物主代词或名词所有格之前。
③treble可作 v/adj，通常可以和 triple 互换，但有时只能用 triple，如 the triple alliance。
<2>。
）例：You have paid twice/two times the usual price.You are twice/two times her/Jenny's age.Four is the double of two.（double 作名词）He doubled/trebled his income in 6 years.（double/treble 作动词）It is double the distance.（double 作形容词）The driver demanded double the usual fare.（double 作副词）Duple quantity of iron is needed for this project.The amount of alcohol in his blood was triple the legal maximum.They have produced twofold/threefold as many washers as they did last year.This river is as wider again as that one.He earns treble my salary.（treble 作副词）Treble salaries were paid.（treble 作形容词）I asked for a treble (portion of wine).（treble 作名词）20 is the quadruple of 5.（quadruple 作名词）Sales have quadrupled in the last 5 years.（quadruple 作动词）A quadruple alliance comes into being.（quadruple 作形容词）This year we produced quadruple that of last year.（quadruple 作副词）14.倍数比较的表示法：1)X times as + adj/adv（原级）+ as ... <划线部分>)例：My room is twice as long as hers.My room is half as long as hers.（倍表示法）My room is half as long again as hers.= My room is one and a half times as long as hers.（倍表示法）Jack runs 3 times as fast as Jim.They have twice as many planes as we have. （此句中是 n，不是 adj/adv！）2)X times + adj/adv（比较级）+ than …… <划线部分>)例：My room is twice longer than hers. = My room is as long again as hers.My room is half longer than hers.（倍表示法）My room is one and a half times longer than hers.（倍表示法）Jack runs 3 times faster than Jim.The cotton output is 20% greater than that of 2009.（此句中是 20%，不是倍数！）3)X times + the width (length, breadth, level, value, size, velocity) of …例：My room is twice the length of hers.My room is half the length of hers.（倍表示法）My room is one and a half times the length of hers.（倍表示法）The earth is 49 times the size of the moon.15.倍数增减的表示法：1)increase/exceed/speed up/step up/raise/rise/go up/grow/... + by + 百分数(X%)/倍数(X)；（A 增加了 X% ‖ A 增加为原来的 X 倍）例：Sales increased by 15%.The production of TV sets in the fourth quarter increase by 3 times.2) A be/multiply/increase/exceed/speed up/step up/raise/rise/go up/grow... + 数词(X) + times/fold；（A 是/增加为原来的 X 倍）例：Sales increased 3 times.The production of notebooks computers has been increased sixfold over/as against/as compared with that of 2005.3) A multiply X times & A be multiplied by + 数字；（A 增加为原来的 X 倍）例：Sales have been multiplied by 4 times.The production has multiplied 8 times.4) A increase/exceed/speed up/step up/raise/rise/go up/grow/decrease/drop/fall/weaken/shorten/reduce/step down/speed down/go down + by a factor of + 百分数(X%)/数词(X)；（A 增加/减少/...为原来的 X 倍）例：Sales have increased/decreased by a factor of 5.The speed exceeded (the average value) by a factor of 4.It raised by an (average) factor of 30%.5) A decrease/drop/fall/weaken/shorten/reduce/step down/speed down/go down + by +百分数(X%)/数词(X)/倍数(X)；（A 减少/下降/...了 X ‖ A 减少/下降/...为原来的 1/X）例：Sales have decreased by 5,000 RMB/3 times.The price of rice was reduced by 15%.6) A 黄色部分/绿色部分 to ...；（A 增加/减少到 ...）例：Sales increased/decreased to 50 million.The soldiers have increased to 1,000.7) A be + 倍数(X) + upon/over B；（A 是 B 的 X 倍）例：Sales was 3 times upon/over that of last year.I am twice upon/over your age.The number of college students for 2010 is 30 times over that for 1995.8) A be + 倍数(X) + what 从句；（A 是 ... 的 X 倍）例：Sales are 4 times what we had for the first quarter.The population is (more than) 3 times what it was in 1985.9) A be + 百分数(X%) + above/higher than B；（A 比 B 高 X%）例：Sales are 40% above/higher than that of last month.The export this month was 23% above/higher than that was achieved in May.10)A be up + 倍数(X)；（A 增加为原来的 X 倍）例：Sales (this month) was up 6 times.His income this month was up 3 times.The nation's grain output was up times.11)A show/register + 百分数(X%) + increase/decrease（名词）；（A 增加/减少了 X%）例：Sales in August registered/showed a 25% increase/decrease over March.12)A be + 百分数(X%)/数字(X) + less than B；（A 比 B 少 X%）例：Sales are 37% less than (that of) last month.The steel output this year is 10,000 tons less than in 2001.（注：by 常可省略，但 to 则不可省略）16.5 feet square 与 5 square feet 的区别：A table 5 feet square has an area of 25 square feet.17.“减少一半”的表示法：1)be half as many/much/long/fast/... as ...2)twice thinner than ...3)reduce/decrease/... by one half4)be one half less5)cut/break/split/... A in half/into halves6)half the (usual) price/speed/...18.概数的表示法：1)“over/above/more than + 数字”或“数字 + odd”2)below/under/less than + 数字3)“about/nearly/some/toward(s)/more or less + 数字”或“数字 + or so”（注：“数字 + more or less”和“more or less + 数字”等价）4)其它零散表示法。