数词的用法

数词•数词分为基数词和序数词。一基数词的构成1one11eleven20twenty2two12twelve21twenty-one3three13thirteen30thirty4four14fourteen40forty5five15fifteen50fifty6six16sixteen60sixty7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90ninety10ten100one/ahundred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threehundredandtwenty-one3212、右往左数,三位一组,逗号隔开.依次是thousand(千)1，000million(百万)1，000,000billion(十亿)1,000,000,0001.hundredthousand(表示具体数字)millionbillion2.hundredsthousands(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1st2nd3rdfourth4th5thsixth6thseventh7th8th9thfirstsecondthirdfiftheighthninthnine二序数词的构成21twenty-21st22twenty-22nd23twenty-23rd24twenty-fourth24th……………………………………….firstscondthird练一练一读出下列数字791039991,3026,896,203123,234,438,209第九第四十第五十二第八十六第三百零三_____________thethreehundredandthird基数词的用法时间类型表示法例读法整点基数词（+o’clock)1:00几点过几分分钟+past+小时2:1030分钟half+past+小时3:30几点差几分分钟+to+小时4:4015分钟=一刻钟aquarter5:156:45简化法按顺序读基数词7:50oneo’clocktenpasttwohalfpastthreetwentytofiveaquarterpastfiveaquartertosevensevenfifty表示在几点钟用介词at1.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：onMay1(st),2011读作：onthefirstofMay,twothousandandeleven或onMaythefirst,twothousandandelevenb.在1989年9月写作：inSeptember,1989on+日on+月.日on+年.月.日in+月in+年in+年.月in+季节80%基数词+percent（%）3.78threepointseveneight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：inone’steens.2）.表示“几十岁”；用inone’s+整十数词复数的复数inone’sthirties表示在某人三十几岁时（30—39岁）。在他五十多岁时，写作______________3）18岁：eighteenyearsold4）一个十八岁的男孩：an18-year-oldboy5）inhisfifties数词的用法4—年龄：attheageof+年龄：在几岁的时候①Thewinneris___.Heisan___boy.A.eight-year-old;eightyearsoldB.eightyearsold;eight-year-oldC.eight-yearsold;eight-year-old②HecametoChina____.A.attheageof20B.whenheis20C.atageof20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．aseven-dayholidayathree-year-oldgirl①Theriverisabout____.A.6,000meterslongB.6,000-meters-longC.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threetimes(三倍或以上：基数词＋times)基数词的用法6：倍数Thisboxisfivetimesasbigasthatone.=Thisboxisfourtimesbiggerthanthatone.①A+be+倍数+as+adj.原+as+B.A是B的…倍…②A+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onefifth27分子﹥1分母+stwosevenths14分子a分母quarteraquarter34threequarters12ahalf13threeandonethird3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。____ofthelandinthatdistrict_____coveredwithtreesandgrass.A.Twofifth,isB.Twofifth,areC.Twofifths,isD.Twofifths,areC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Room207ClassOneGradeThreePartfive=thefifthpartLessonone=thefirstlessonBusNo.3=theNo.3busNo.1MiddleSchool基数词的用法8—编号基数词也可以表示顺序。thefirstlesson——LessonOne1）.inthe+数词的复数，意为在······年代，如:inthenineties在九十年代可写作：inthe90s2）.inthe+序数词+century,意为在……世纪如：在19世纪inthenineteenthcentury在十九世纪三十年代写作____________________inthe1830s数词的用法9—世纪年代1.Itisnotrarein_____thatpeoplein____fiftiesaregoingtouniversityforfurthereducation.A.90s,theB.the90s,/C.90s,theirD.the90s,their2.Jackisnowin_____.A.thethreegradeB.GradeThirdC.GradeThree3.---Peter,howoldisyourfatherthisyear?----_______.Andwejusthadapartyforhis______birthdaylastweekA.Fortieth,fortyB.Forty,fortyC.Forty,fortiethD.Fortieth,forthiethcCC1.“加”用plus：[plʌs]，and或add表示Howmuchistwoplusthree?Itisfive．Twoandthreeisequaltofive．2.“减”用minus：['mainəs]Howmuchistenminussix?3.“乘”times或者multiply['mʌltiplai]3X4＝?Howmuchisthreefour?4.“除”用divide的过去分词形式表示16÷4=?Howmuchissixteendividedbyfour?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”。Canyougivemeasecondtime．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[ˈjʊərəʊ]常考习题选择题1.-------Whenwasheborn?--------Hewasborn_________.A.in1988June6B.onJune6,in1988C.inJune6,1988D.onJune6,19882.Thelibraryintheschoolisn'tlarge.Thereareonly_____booksinit.A.sixthousand,fivehundredandforty-oneB.sixthousandandfivehundredandforty-oneC.sixthousandsfivehundredfortyandoneD.sixthousand,fivehundredsandforthone3.AthoughIfailedfourtimes,myfatherencouragedmetotrya_____time.A.twoB.fourC.thirdD.fifthDAD4.TheOlympicsGamesareheld____________.A.everyfouryearsB.everyfouryearC.everyfourthyearsD.everyfour-year5.Theyellowriveris____inChina.ItgoesthroughmanycitiesinChina.A.thesecondlongestriverB.thelongestscondriverC.thesecondlongestriversD.thelongestscondriversAA6.Inourschoolmorethan_____boys______likeEnglish.A.twofifths;don'tB.twofivesdon'tC.twofifthsdoesn'tD.scondfivedoesn't7.Thecarcostme_____dollars.A.eightthousandsB.eightthousandofC.eightthousandsofD.thousandof8.Thewartookplace_________.A.1720sB.1720'sC.inthe1720sD.the17209.Igotabeautifulbikeon______birthday.Ilikeitverymuch.A.fifteenthB.fifteenC.myfifteenD.myfifteenthACDA10Fiveminustwo_________three.A.wasB.areC.wereD.isD①102②6500③123456789④第一⑤第五⑥第二十一⑦1/3⑧2/7⑨9.8⑩2：00作业：①5：30②5:06③7:58④70％⑤69％⑥在1983年⑦在20世纪50年代⑧在1998年4月1号⑨在9月⑩在10月1号January——1月Jan.February——2月Feb.March——3月Mar.April——4月Apr.May——5月May.June——6月Jun.July——7月Jul.August——8月Aug.September--9月Sept.October——10月Oct.November—11月Nov.December——12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Inthe20thcentury：在20世纪decade-十年inthe1990s：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：winterThankyou