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1、学习目标学习目标一基数词的构成。一基数词的构成。二序数词的构成。二序数词的构成。三数词的基本用法。三数词的基本用法。四数词的特殊用法。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。一一基数词的构成基数词的构成 1one11eleven20twenty2two12twelve21twenty-one3three13thirteen30thirty4four14fourteen40forty5five15fifteen50fifty6six16sixteen6
2、0sixty7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90ninety10ten 100one/ahundred二 序数词的构成一基数词的构成二序数词的构成1one 1st2two2nd3three3rd4fourfourth4th5five5th6sixsixth6th7sevenseventh7th8eight8th9nine9th firstscondthirdfiftheighthninth八加八加h九去九去e一二三,特殊记一二三,特殊记 一一基数词的构成基数词的构成二二序数词的构成序数词的构成10
3、tententh10th11eleveneleventh11th1212twelve12th13thirteenthirteenth13th14fourteenfourteenth14th1515fifteenfifteenth15th16sixteensixteenth16th1717seventeenseventeenth17thtwelfthe,ve要用要用f替替一一基数词的构成基数词的构成二二序数词的构成序数词的构成18eighteeneighteenth18th19nineteennineteenth19th20twenty20th21twenty-onetwenty-21th22t
4、wenty-twotwenty-22th23twenty-threetwenty-23th24twenty-fourtwenty-fourth24th twentiethfirstscondthird以以y结尾变结尾变ie,后跟后跟th莫忘记莫忘记若想表示几十几若想表示几十几只变个位就可以只变个位就可以1,000一千一千_10,000一万一万_1,000,000一百万一百万_1,000,000,000十亿十亿_onethousandtenthousandonemilliononebillion一一基数词的构成基数词的构成二二序数词的构成序数词的构成二二25twenty-fivetwenty-f
5、ifth25th30thirtythirtieth30th100onehundredonehundredth100th101hundredandoneonehundredandfirst101th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_ 二二写出下列数字写出下列数字.1.twothousandsixhundredandfifty-nine_2.eighteenmilliontwohundredandthirtythousandandsixty-ei
6、ght_ thethreehundredandthird265918,230,068三三数词的基本用法数词的基本用法1.数字表示时刻数字表示时刻a.整点整点7:00读作读作sevenoclock或或seven.3:00读作读作b.用用past表示表示“几点过几分几点过几分”8:09读作读作eightonine或或ninepasteight11:26读作读作结构:不超过结构:不超过30分钟的,用分钟分钟的,用分钟+past+点钟数点钟数c.用用to表示几点差几分表示几点差几分4:50读作读作tentofive12:50读作读作-结构:超过结构:超过30分钟的,用(分钟的,用(60-分钟数)分钟数
7、)+to+(点钟数(点钟数+1)d.用用half表示半小时表示半小时5:30读作读作fivethirty或或halfpastfive4:30读作读作e.正好十五分钟正好十五分钟也可用也可用quarter例如例如1:15读作读作aquarterpastone9:45读作读作threeoclocktwenty-sixpastelevententoonefourthirty或或halfpastfouraquartertoten在时间前用介词在时间前用介词at,如:在,如:在6:45:ataquartertoseven或或atsixforty-five三三数词的基本用法数词的基本用法2.数词表示年数词
8、表示年月月日日英语年月日的顺序:日英语年月日的顺序:日月月,年年或或月月日,年日,年a.在在2011年年5月月1号号写作写作:on1(st)May,2011或或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,1989读作:读作:inSeptember,nineteeneighty-nine2013年年4月月22日:日:thetwenty-sendofApril,twothousandandeleve
9、nAprilthetwenty-sendtwothousandandeleven3.数词表示编号数词表示编号LessonOne=thefirstlesson结构结构:名词名词+基数词基数词或或the+序数词序数词+名词名词如:如:Page5=Room21读作读作4.表示年龄表示年龄a.表示十几岁用表示十几岁用teens指从指从13岁到岁到19岁。在某人十几岁时:岁。在某人十几岁时:inonesteens.b.表示表示“几十岁几十岁”;用;用inones+数词复数数词复数inonesthirties表示在某人三十几岁时表示在某人三十几岁时,指从,指从30岁到岁到39岁。岁。在他五十多岁时写作在他
10、五十多岁时写作c.18岁:岁:eighteenyearsoldd.一个十八岁的男孩:一个十八岁的男孩:an18-year-oldboy=aboyof18inhisfiftiesthefifthpageRoomTwenty-onethetwenty-firstroom加减乘数表达法a.加4+5=9表述为:Four and five are(is)nine.Four plus five equals nine.b.减9-4=5表述为:Nine minus four equals five.Four from nine leaves five.Nine less four is(are)five.N
11、ine minus four is equal to five.Take four from nine and the reminder is five.c.乘4*5=20表述为Four times five is(are)twenty.Four multiplied by five is(gives,equals,makes)twenty.d.除20/5=4表述为Twenty divided by five is equal to(equals,gives,makes)four.Five into twenty goes four times.1.It is not rare in _ th
12、at 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.GradeThirdB.C.GradeThreeC.3.-Peter,howoldisyourfatherthisyearD.-_.Andwejusthadapartyforhis_birthdaylastweekE.Fortieth,fortyB.Forty,fortyF.C.Forty,fortie
13、thD.Fortieth,forthiethDCC数词的特殊用法数词的特殊用法1.分数分数分子用基数词,分母用序数词,分子大于一时分子用基数词,分母用序数词,分子大于一时,分母,分母用复数用复数形形式。式。1/3onethird2/3twothirds3/5读作读作ahalf_threequarters_twothirdsmetre意意_2.百分数百分数倍数倍数5%fivepercent67%读作读作一次一次once两次两次twice三次三次threetimes四次四次读作读作六倍六倍读作读作3.小数小数0.6zeropointsixonepointfive_ 4.表示世纪年代表示世纪年代a.
14、inthe+数词的复数数词的复数,意为,意为在在年代,年代,如如:inthenineties在九在九十年代十年代可写作:可写作:inthe90sb.inthe+序数词序数词+century,意为在意为在世纪,如:在世纪,如:在19世纪世纪inthenineteenthcentury在十九世纪三十年代在十九世纪三十年代写作写作thesixthcentury译译_intheearly1920s_threefifths二分之一二分之一四分之三四分之三三分之二米三分之二米sixty-sevenpercentfourtimessixtimesinthe1830s六世纪六世纪在二十世纪二十年代早期在二十世
15、纪二十年代早期1.5 _ 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 C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。数。该题中的是不可数名词,所以动词需用单数。5.hundred,thousand,million的用法的用法a.与具体数次与具体数次one,two或或several
16、等连用时,要用单数等连用时,要用单数如:如:300人:人:threehundredpeopleb.与与of连用,要用复数,前面不能加具体数词,连用,要用复数,前面不能加具体数词,表示表示“数百数百”、“数千数千”、“数百万数百万”等不确切数目等不确切数目如:如:hundredsofpeople6.数词加减乘除表示法数词加减乘除表示法a.“加加”用用plus,and,或或add表示:等于用表示:等于用“is,等词表示,等词表示如:如:2+3=?Howmuchistwoplusthree?2+3=5Twoplusthreeisfive.b.“减减”用用minus表示表示10-6=4Tenminus
17、sixisfour.c.“乘乘”用用time或或multiply表示表示34=12Threetimesfouristwelve.d.“除除”用用divide的过去分词形式表示的过去分词形式表示164=4Sixteendividedbyfourisfour.当堂检测当堂检测1.IstudyinPingLiChengguanMiddleSchool,therearetwo_studentsinourschool.A.thousandsB.thousandsofC.thousandofD.thousand2Whenspringcomes,_treesareplantedinourcity.A.ami
18、llionofB.millionsofC.twomillionsD.millionof3.Fiveminustwo_three.A.wasB.areC.wereD.isCBD7.不定冠词不定冠词+序数词序数词表示表示“又一次又一次”。a.Doyouwanttotryathirdtime?你想做第三次尝试吗?你想做第三次尝试吗?b.Thelittlemonkeyhadhadthreebananas,andhewantedtoeatafourthone.我可以再试一次吗?我可以再试一次吗?8.数词用连字符数词用连字符“-”连接连接作复合定语作复合定语amillion-poundnote一张百万英镑
19、的支票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。他有一个三岁大的妹妹。_9.用在习语中用在习语中intwosandthrees三三两两三三两两atsevensandeights_MayIhaveascondtry一篇两千字的作文一篇两千字的作文一个二十米宽的广场一个二十米宽的广场Hehasathree-year-oldsister.乱七八糟乱七八糟选择题选择题1.-Whenwasheborn?-Hewasborn_.A.in1988June6B.onJune6,in1988C.inJun
20、e6,1988D.onJune6,19882.Thelibraryintheschoolisntlarge.Thereareonly_booksinit.A.sixthousand,fivehundredandforty-oneB.sixthousandandfivehundredandforty-oneC.sixthousandsfivehundredfortyandoneD.sixthousand,fivehundredsandforthone3.AthoughIfailedfourtimes,myfatherencouragedmetotrya_time.A.twoB.fourC.thi
21、rdD.fifthDAD4.TheOlympicsGamesareheld_.A.everyfouryearsB.everyfouryearC.everyfourthyearsD.everyfour-year5._thestudentsinourschoolisabouttwothousand,and_ofthem_girls.A.Anumberof;twothird;areB.Thenumberof;twothirds;isC.Anumberof;twothirds;isD.Thenumberof;twothirds;are6.Theyellowriveris_inChina.Itgoest
22、hroughmanycitiesinChina.A.thesecondlongestriverB.thelongestscondriverC.thescondlongestriversD.thelongestscondriversADA7.Inourschoolmorethan_boys_likeEnglish.A.twofifths;dontB.twofivesdontC.twofifthsdoesntD.scondfivedoesnt8.Thecarcostme_dollars.A.eightthousandsB.eightthousandofC.eightthousandsofD.tho
23、usandsof9.Thewartookplace_.A.1720sB.1720sC.inthe1720sD.the172010.Igotabeatutifulbikeon_birthday.Ilikeitverymuch.A.fifteenthB.fifteenC.myfifteenD.myfifteenthDCCA课外知识衔接课外知识衔接:1.集合数词集合数词:onedozen_twodozen_ahalfdozen_onescore20twoscoreapples_onedozeneggs_2.阿拉伯数字阿拉伯数字罗马数字罗马数字1iIL-502iiII3iiiIIIC-1004ivIV5vVD-5006viVI7viiVII8viiiVII9ixIX10 xX11xiXI3.量度量度inch(es)、英寸、英寸foot(feet)、英尺、英尺mm公厘公厘cm、公分、公分m公尺公尺km公里公里12246四十个四十个苹苹果果十二个鸡蛋十二个鸡蛋 Thank you
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