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1、Lesson16数词什么是数词？表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。基数词onetwothreefourfivesixseveneightsevensixthreezeroninetwooneeightfourfivenumberssevensixthreezeroninetwooneeightfourfiveNumbersarewidelyused.Hello，86861873---Let’scount!1-10onetwothreefourfivesixseveneightn
2、ineten11-19eleventwelvethirteenforteenfifteensixteenseventeeneighteennineteenLet’sreview102030405060708090100tenthirtyfortyseventysixtyOnehundredfiftyninetytwentyeighty1324LookandRead100onehundred1,000onethousand1,000,000onemillion1,000,000,000onebillion1002,00030,000400,0005,00
3、0,00060,000,000 700,000,0008,000,000,00090,000,000,000100,000,000,000Canyoureadthem?hundredthousandmillionbillionone hundredonethousandten thousandone hundred thousandonemillionten millionone hundred milliononebillionten billionone hundred billiontens/hundreds/thousand
4、s/millionsof一百一千一万十万一百万一千万一亿十亿一百亿一千亿数十/百/千/百万看谁译得快：,Step1:onehundredandtwenty-threebillion,Step2:fourhundredandfifty-sixmillion,Step3:sevenhundredandeighty-ninethousand,Step4:onehundredandthree103789456123,,625sixhundredandtwenty-five8,961eightthousand,ninehundredandsixty-one95,
5、680ninety-fivethousand,sixhundredandeightyLookandPracticeLookandPractice6,302,876sixmillion,threehundredandtwothousand,eightyhundredandseventy-six45,690,510,810forty-fivebillion,sixhundredandninetymillion,fivehundredandtenthousand,eighthundredandten8391Whatisthelargest/smallest4
6、-digitnumber?98311389Let’sdoapractice!facetofacenumbertonumberone---firsttwo---secondthree---thirdfour---fourthfive---fifthsix---sixthseven---seventheight---eighthnine---ninthten----tenth序数词twenty---twentieththirty---thirtiethforty---fortiethfifty---fiftiethsixty---sixtiethseven
7、ty---seventietheighty---eightiethninety---ninetiethtenthnintheighthseventhsixthfifthfourththirdsecondfirstordinalnumberstenthnintheighthseventhsixthfifthfourththirdsecondfirst一、二、三，特殊记，加th从4起，八少“t”，九去“e”，“ve”要用“f”替，(five,twelve)见“y”变成“i”和“e”，词尾加上“th”，(twenty,thirty,---ninety)若是遇
8、到几十几，只变个位就可以。ordinalnumbers(序数词)Canyouwritethei
