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1、第六讲—数词、介词数词数词的种类（1）基数词—表示数量的多少one,two,ten（2）序数词—表示数的顺序first,second,ninth,twelfth其前要加上冠词the或代词。1.IhavealreadygottwolettersfromSusanthisyear.Sothisisthethethirdone.2.ThisishersecondvisittoShanghai,isn’tit?基数词一、基数词（cardinalnumbers）1~12onetwothreefourfivesixseveneightnineteneleventw
2、elve13~19-teenthirteenfourteenfifteensixteenseventeeneighteennineteen20~90-tytwentythirtyfortyfiftysixtyseventyeightyninety21~99twenty-onethirty-twoforty-threeninety-nine100201122onehundredtwohundredandoneonehundredandtwenty-one1,0001,53210,000100,000onethousandonethousandfivehu
3、ndredandthirty-twotenthousandonehundredthousand1,000,0001,000,000,000onemilliononebillionGrammar二、序数词（ordinalnumbers）123first(1st)second(2nd)third(3rd)4~19基数词后加-thfourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnin
4、eteenth20~90变-ty为-tiethtwentieththirtieth…….Ninetieth21~99十位数用基数词，个位数用序数词twenty-firstfifty-fourth…….ninety-ninth1001,0001,000,0001,000,000,000直接加-thonehundredthonethousandthonemillionthonebillionth2081,937只在个位数用序数词，其它用基数词。twohundredandeighthonethousandninehundredandthirty-sevent
5、hGrammar用英语读出下列数字：1112267051，0984，56875，137425，7121，306，5272，032，67836，441，000900，745，0221，280，532，866练习onehundredandonetwohundredandtwenty-sixsevenhundredandfiveonethousandandninety-eightfourthousand,fivehundredandsixty-eightseventy-fivethousand,onehundredandthirty-sevenfourhun
6、dredandtwenty-fivethousand,sevenhundredandtwelveonemillion,threehundredandsixthousand,fivehundredandtwenty-seventwomillion,thirty-twothousand,sixhundredandseventy-eightthirty-sixmillion,fourhundredandforty-onethousandninehundredmillion,sevenhundredandforty-fivethousand,andtwenty
7、-twoonebillion,twohundredandeightymillion,fivehundredandthirty-twothousand,eighthundredandsixty-six用基数词或序数词填空：1.The___________dayoftheyearisNewYear’sDay.2.There’sonly__________Sundayinaweek.3.July’sthe____________monthoftheyear.4.Threetimesfourequals____________.5.Thenumber195ha
8、sthreedigits.The_________digitisa‘nine’andthe__
