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1、数词数词分为基数词和序数词。一一基数词的构成基数词的构成 1one11eleven20twenty2two12twelve21twenty-one3three13thirteen30thirty4four14fourteen40forty5five15fifteen50fifty6six16sixteen60sixty7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90ninety10ten 100one/ahundred基数词的读法基数词的读法1 1、百位和十位间用、百位和十位间用 and 连接连接, , 十位
2、和个位间用十位和个位间用 - 连接连接threehundredandtwenty-one3212 2、右往左数、右往左数, ,三位一组三位一组, ,逗号隔开逗号隔开. .依次是依次是 thousand(千千)1，000million(百万百万)1，000,000billion(十亿十亿)1,000,000,0001.hundredthousand(表示具体数字表示具体数字) millionbillion2.hundredsthousands(表示概数表示概数)millions(数以数以计计) billions基数词的用法基数词的用法-表示数量表示数量具体数字+ +of+复数名词复数名词二 序数
3、词的构成1st2nd3rdfourth4th5thsixth6thseventh7th8th9th firstsecondthirdfiftheighthninthnine二二序数词的构成序数词的构成21twenty-21st22twenty-22nd23twenty-23rd24twenty-fourth24th. firstscondthird练一练练一练一一读出下列数字读出下列数字791039991,3026,896,203123,234,438,209第九第九第四十第四十第五十二第五十二第八十六第八十六第三百零三第三百零三_ thethreehundredandthird基数词的用法基
4、数词的用法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（+oclock)1:00几点过几分几点过几分分钟+past+小时2:1030分钟分钟half+past+小时3:30几点差几分几点差几分分钟+to+小时4:4015分钟分钟=一刻钟一刻钟aquarter5:156:45简化法简化法按顺序读基数词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 at1.1.表时间表时间 1) 1) 钟点钟点
5、时间时间2)数词表示年数词表示年月月日日英语年月日的顺序：月英语年月日的顺序：月日，年日，年a.在在2011年年5月月1号号写作写作：onMay1(st),2011读作：读作：onthefirstofMay,twothousandandeleven或或onMaythefirst,twothousandandelevenb.在在1989年年9月月写作写作：inSeptember,1989on+日日on+月月.日日on+年年.月月.日日in+月月in+年年in+年年.月月in+季节季节80 %基数词基数词 + percent（%）3.78three point seven eight 小数点小数点
6、基数词的用法基数词的用法2：百分数：百分数：基数词的用法基数词的用法3：小数：小数：1）.表示十几岁用表示十几岁用teens指从指从13岁到岁到19岁。岁。在某人十几岁时在某人十几岁时：inonesteens.2）.表示表示“几十岁几十岁”；用；用inones+整十数词复数的复数整十数词复数的复数inonesthirties表示在某人三十几岁时表示在某人三十几岁时（3039岁）。岁）。在他五十多岁时，写作在他五十多岁时，写作_3）18岁：岁：eighteenyearsold4）一个十八岁的男孩：）一个十八岁的男孩：an18-year-oldboy5）inhisfifties数词的用法数词的用法
7、4 4 年龄：年龄：attheageof+年龄：年龄：在几岁的时候在几岁的时候 Thewinneris_.Heisan_boy.A.eight-year-old;eightyearsoldB.eightyearsold;eight-year-oldC.eight-yearsold;eight-year-oldHecametoChina_.A.attheageof20B.whenheis20C.atageof20 基基数词的用法数词的用法4 4 年龄年龄基数词基数词常与常与名词名词构成的构成的合成词合成词在句中在句中作定语，中间要用连字符作定语，中间要用连字符“-”，这个，这个名词只用名词只用单
8、数形式单数形式aseven-dayholidayathree-year-oldgirlTheriverisabout_.A.6,000meterslongB.6,000-meters-longC.6,000-meter-long 基数词的用法基数词的用法5 5 ：计量计量be + 数词数词 + 量词量词 + 形容词形容词一倍once，两倍twice，三倍threetimes(三倍或以上：基数词times)基数词的用法基数词的用法6 6：倍数倍数 This box is five times as big as that one.=This box is four times bigger th
9、an that one. A + be + 倍数倍数 + as +adj.原原+ as +B. A是是B的的倍倍A + be + 倍数倍数 + adj.比比+ than +B.A比比B（宽，大，长）倍数（宽，大，长）倍数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基数词基数词 + and + 分数分数数词的用法数词的用法7 7 分数：分数：分子分子用基用基数词，数词，分
10、母分母用序用序数词，数词，当分当分子超子超过过“1”时，时，分母分母用复用复数。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, areC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 p
11、artLesson one = the first lesson Bus No.3 = the No.3 busNo. 1 Middle School 基数词的用法基数词的用法8 8 编号编号基数词也可以表示顺序。基数词也可以表示顺序。thefirstlessonLessonOne1）.inthe+数词的复数数词的复数，意为，意为在在年代，年代，如如:inthenineties在九十年代在九十年代可写作：可写作：inthe90s2）.inthe+序数词序数词+century,意为在意为在世纪世纪如：在如：在19世纪世纪inthenineteenthcentury在十九世纪三十年代在十九世纪三十
12、年代写作写作_inthe1830s数词的用法数词的用法9 9 世纪年代世纪年代 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.Jackisnowin_.A.thethreegradeB.GradeThirdC.GradeThree3.-Peter,howoldisyourfatherthisyear?-_.Andwejusthadaparty
13、forhis_birthdaylastweekA.Fortieth,fortyB.Forty,fortyC.Forty,fortiethD.Fortieth,forthiethcCC1. 1. “加加”用用plusplus：plpls s ，andand或或addadd表示表示 How much is two plus three?How much is two plus three? It is five It is five Two and three is equal to fiveTwo and three is equal to five2. 2. “减减”用用 minusminus
14、：mainmains s How much is ten minus six? How much is ten minus six?3. 3. “乘乘” timestimes或者或者multiplymmultiplymltiplailtiplai 3X4 3X4? How much is three four? How much is three four?4. 4. “除除”用用dividedivide的过去分词形式表示的过去分词形式表示 16164=? How much is sixteen divided by four?4=? How much is sixteen divided b
15、y four?数词的用法数词的用法10 10 加减乘除加减乘除注：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 人民币人民币RMB：yuan英镑英镑GBP：pound(s)美元美元USD:dollar(s)欧元欧元EUR:euro（s）常见钱币单位常见钱币单位jr常考习题常考习题选择题选择题1.-Whenwasheborn?-Hewasborn_.A.in1988June6B.onJune6,in1988C.inJune6,1988D.onJune6,19882.Thelibraryinthes
16、choolisntlarge.Thereareonly_booksinit.A.sixthousand,fivehundredandforty-oneB.sixthousandandfivehundredandforty-oneC.sixthousandsfivehundredfortyandoneD.sixthousand,fivehundredsandforthone3.AthoughIfailedfourtimes,myfatherencouragedmetotrya_time.A.twoB.fourC.thirdD.fifthDAD4.TheOlympicsGamesareheld_.
17、A.everyfouryearsB.everyfouryearC.everyfourthyearsD.everyfour-year5.Theyellowriveris_inChina.ItgoesthroughmanycitiesinChina.A.thesecondlongestriverB.thelongestscondriverC.thesecondlongestriversD.thelongestscondriversAA6.Inourschoolmorethan_boys_likeEnglish.A.twofifths;dontB.twofivesdontC.twofifthsdoe
18、sntD.scondfivedoesnt7.Thecarcostme_dollars.A.eightthousandsB.eightthousandofC.eightthousandsofD.thousandof8.Thewartookplace_.A.1720sB.1720sC.inthe1720sD.the17209.Igotabeautifulbikeon_birthday.Ilikeitverymuch.A.fifteenthB.fifteenC.myfifteenD.myfifteenthACDA10Fiveminustwo_three.A.wasB.areC.wereD.isD10
19、210265006500123456789123456789第一第一第五第五第二十一第二十一1/31/32/72/79.89.822：0000作业：作业：5：305:067:58706969 在在19831983年年在在2020世纪世纪5050年代年代在在19981998年年4 4月月1 1号号在在9 9月月在在1010月月1 1号号January1月月Jan.February2月月Feb.March3月月Mar.April4月月Apr.May5月月May.June6月月Jun.July7月月Jul.August8月月Aug.September-9月月Sept.October10月月Oct.November11月月Nov.December12月月Dec.Monday周一周一Tuesday周二周二Wednesday周三周三Thursday周四周四Friday周五周五Saturday周六周六Sunday周日周日century-世纪世纪Inthe20thcentury：在：在20世纪世纪decade-十年十年inthe1990s：在：在20世纪世纪90年代年代year-年年season-季节季节month-月月day-天天date-日期日期春：春：spring夏：夏：summer秋：秋：autumn冬：冬：winter Thank you
