数词（b/c）掌握基数词和序数词的构成及基本用法（B)；熟练掌握日期、钟点和年龄等的表达方法(C)；数词的分类基数词的构成两位基数词的构成onehundredonethousandtenthousandonehundredthousandonemilliontenmilliononehundredmilliononebilliontenbilliononehundredbilliontens/hundreds/thousands/millionsof1002,00030,000400,0005,000,00060,000,000700,000,0008,000,000,00090,000,000,000100,000,000,000,基数词的用法4.编了号的事物要用基数词表示顺序，但是基数词要后置。如：第一课第305房间第12路公共汽车序数词：表示顺序的词。相当于中文的“第几...”基本构成:一、二、三，特殊记，加th从4起，八加“h”，九去“e”，“ve”要用“f”替，(five,twelve)“ty”变成“tie”，词尾加上“th”，(twenty,thirty,---ninety)若是遇到几十几，只变个位就可以。两位序数词的构成Canyouwritetheirordinalnumbers?序数词的用法2.年、月、日的表达法2时间表达法5.表示编号基数词和序数词+名词可以表示事物的编号，如：LessonOne=thefirstlesson,BusNo.3=theNo.3bus注意:（1）表示房间住所时，不必用“No.”来表示编号，但常将名词大写。如：Room302（2）如果编号的数字较长，一般用基数词，读法也简化。Page367Homework专题例析:例3——Excuseme,howdoesthisnumber20,135read?——Itreads___________.A.twentythousandsonehundredandthirtyfiveB.twentythousandonehundredthirtyfiveC.twentythousand,onehundredandthirty-fiveD.twentythousands,onehundredandthirty-five分析：根据数字的读法规律，选C。例4Inourclass______ofthestudentsaregirls.A.threefifthsB.threefifthC.thirdfiveD.thirdfifths分析：根据分数的表达方法，分子用基数词，分母用序数词，分子大于1，分母用复数可以找到正确答案为A。专题训练:5.Nine_____poundsaweek?That’sverygood.A.hundredofB.hundredsofC.hundredsD.hundred.6.Sharkshavebeenontheearthfor_____years.A.thousandsofB.twothousandsC.twothousandsofD.thousandof7.______peoplecometoJilintovisitMountChangbaieveryyear.A.ThousandsofB.ThousandofC.ThousandsD.Thousand8.Thecomputerwascheap.Ispentonlytwo_____yuanonit.A.thousandsB.thousandC.thousandsofD.thousandof9.About_____oftheworkersintheclothesfactoryarewomen.A.thirdfifthsB.thirdfifthC.threefifthsD.threefifth10.Theroadisover______metreslong.A.sixhundredsandfifty-twoB.sixhundredandfifty-twoC.sixhundred,fifty-twoD.sixhundred,fiftyandtwo11.Septemberis_____monthoftheyear.A.ninthB.eighthC.theeighthD.theninth12.It’sabout______kilometresfromNanningtoBeijing.A.twothousand,fivehundredandsixtyB.twothousand,fivehundredsandsixtyC.twothousands,fivehun