ppt数词

学习目标一基数词的构成。二序数词的构成。三数词的基本用法。四数词的特殊用法。数词概述•表示数目多少或顺序先后的词叫数词。•数词分为基数词和序数词。•基数词表示数目或数量多少。序数词表示顺序和等级。•数词在句中可作主语、宾语、表语、定语和同位语等成分。一基数词的构成1one11eleven20twenty2two12twelve21twenty-one3three13thirteen30thirty4four14fourteen40forty5five15fifteen50fifty6six16sixteen60sixty7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90ninety10ten100one/ahundred二序数词的构成一基数词的构成二序数词的构成1one1st2two2nd3three3rd4fourfourth4th5five5th6sixsixth6th7sevenseventh7th8eight8th9nine9thfirstscondthirdfiftheighthninth八加h九去e一二三，特殊记一基数词的构成二序数词的构成10tententh10th11eleveneleventh11th12twelve12th13thirteenthirteenth13th14fourteenfourteenth14th15fifteenfifteenth15th16sixteensixteenth16th17seventeenseventeenth17thtwelfthe,ve要用f替一基数词的构成二序数词的构成18eighteeneighteenth18th19nineteennineteenth19th20twenty20th21twenty-onetwenty-21th22twenty-twotwenty-22th23twenty-threetwenty-23th24twenty-fourtwenty-fourth24thtwentiethfirstscondthird以y结尾变ie,后跟th莫忘记若想表示几十几只变个位就可以1,000一千___________________10,000一万___________________1,000,000一百万________________1,000,000,000十亿_________________onethousandtenthousandonemilliononebillion一基数词的构成二序数词的构成25twenty-fivetwenty-fifth25th30thirtythirtieth30th100onehundredonehundredth100th101hundredandoneonehundredandfirst101th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_____________二写出下列数字.1.twothousandsixhundredandfifty-nine_________2.eighteenmilliontwohundredandthirtythousandandsixty-eight___________________thethreehundredandthird265918,230,068三数词的基本用法1.数字表示时刻a.整点7:00读作seveno'clock或seven.3:00读作————b.用past表示“几点过几分”8:09读作eightonine或ninepasteight11:26读作———————————结构：不超过30分钟的，用分钟+past+点钟数c.用to表示几点差几分4:50读作tentofive12：50读作————---结构：超过30分钟的，用（60-分钟数）+to+（点钟数+1）d.用half表示半小时5:30读作fivethirty或halfpastfive4:30读作—————————e.正好十五分钟也可用quarter例如1:15读作aquarterpastone9:45读作———————threeo'clocktwenty-sixpastelevententoonefourthirty或halfpastfouraquartertoten在时间前用介词at，如：在6:45：ataquartertoseven或atsixforty-five三数词的基本用法2.数词表示年月日英语年月日的顺序：日月,年或月日，年a.在2011年5月1号写作：on1(st)May,2011或onMay1(st),2011读作：onthefirstofMay,twothousandandeleven或onMaythefirst,twothousandandelevenb.在1989年9月写作：inSeptember,1989读作：inSeptember，nineteeneighty-nine2013年4月22日：thetwenty-sendofApril,twothousandandelevenAprilthetwenty-sendtwothousandandeleven3.数词表示编号LessonOne=thefirstlesson结构:名词+基数词或the+序数词+名词如：Page5=Room21读作—————————————————4.表示年龄a.表示十几岁用teens指从13岁到19岁。在某人十几岁时：inone‘steens.b.表示“几十岁”；用inone’s+数词复数inone‘sthirties表示在某人三十几岁时，指从30岁到39岁。在他五十多岁时写作———————c.18岁：eighteenyearsoldd.一个十八岁的男孩：an18-year-oldboy=aboyof18inhisfiftiesthefifthpageRoomTwenty-onethetwenty-firstroom1.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,forthiethACC数词的特殊用法1.分数分子用基数词，分母用序数词，分子大于一时，分母用复数形式。1/3onethird2/3twothirds3/5读作——————ahalf_____threequarters_______twothirdsmetre意__________2.百分数倍数5%fivepercent67%读作————————一次once两次twice三次threetimes四次读作————六倍读作——————3.小数0.6zeropointsixonepointfive___________4.表示世纪年代a.inthe+数词的复数，意为在······年代，如:inthenineties在九十年代可写作：inthe90sb.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————————thesixthcentury译________intheearly1920's_________________threefifths二分之一四分之三三分之二米sixty-sevenpercentfourtimessixtimesinthe1830s六世纪在二十世纪二十年代早期1.5____ofthelandinthatdistrict_____coveredwithtreesandgrass.A.Twofifth,isB.Twofifth,areC.Twofifths,isD.Twofifths,areC分数和百分数作主语时，关键是看其后的名词来决定其谓语动词的数。该题中的是不可数名词，所以动词需用单数。5.hundred,thousand,million的用法a.与具体数次one,two或several等连用时，要用单数如：300人：threehundredpeopleb.与of连用，要用复数，前面不能加具体数词，表示“数百”、“数千”、“数百万”等不确切数目如：hundredsofpeople6.数词加减乘除表示法a.“加”用plus,and,或add表示：等于用“is’，等词表示如：2+3=?Howmuchistwoplusthree?2+3=5Twoplusthreeisfive.b.“减”用minus表示10-6=4Tenminussixisfour.c.“乘”用time或multiply表示3×4=12Threetimesfouristwelve.d.“除”用divide的过去分词形式表示16÷4=4Sixteendividedbyfourisfour.当堂检测1.IstudyinPingLiChengguanMiddleSchool,therearetwo______studentsinourschool.A.thousandsB.thousandsofC.thousandofD.thousand2Whenspringcomes,_____treesareplantedinourcity.A.amillionofB.millionsofC.twomillionsD.millionof3.Fiveminustwo_________three.A.wasB.areC.wereD.isCDD7.不定冠词+序数词表示“又一次”。a.Doyouwanttotryathirdtime?你想做第三次尝试吗？b.Thelittlemonkeyhadhadthreebananas,andhewantedtoeatafourthone.我可以再试一次吗？——————————————？8.数词用连字符“-”连接作复合定语amillion-poundnote一张百万英镑的支票atwo-thousand-wordcomposition_______________atwenty-metre-widesquare____________________他有一个三岁大的妹妹。__________________________9.用在习语中intwosandthrees三三两两atsevensandeights_______MayIhaveascondtry一篇两千字的作文一个二十米宽的广场Hehasathree-year-oldsister.乱七八糟中考风向标1.千以内数词的表达方法。2.基数词变为序数词的方法。3年月日编号时刻的表达方法。4.分数小数的表达方法。中考演练选择题1.-------Whenwasheborn?--------Hewasborn_________.A.in1988June6B.onJune6,in1988C.inJune6,1988D.onJune6,19882.Thelibraryintheschoolisn'tlarge.Thereareonly_____booksinit.A.sixthousand,fivehundredandforty-oneB.sixthousandandfivehundredandforty-oneC.sixth