PEP五下英语第五单元知识点：基数次变序数词课件.ppt

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1、JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberThefirstmonthoftheyearissecondthirdfourthfifthsixtheleventhseventheighthninthtenthtwelfthFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberJanuary.下一页上一页1stfirst2ndsecond3rdthird4thfourth5thfifth6thsix

2、th7thseventh8theighth9thninth10thtenth11theleventh12thtwelfth13ththirteenth14thfourteenth15thfifteenth16thsixteenth17thseventeenth18theighteenth19thnineteenth20thtwentieth21sttwenty-first22ndtwenty-second23rdtwenty-third24thtwenty-fourth25thtwenty-fifth26thtwenty-sixth27thtwenty-seventh28tht

3、wenty-eighth29thtwenty-ninth30ththirtieth31stthirty-firstLearnthesenumbersandfindouttherules:上一页Let’sread!onefirsttwosecondthreethirdfourfourthfivefifthsixsixthsevenseventheighteighthnineninthtententheleveneleventhtwelvetwelfththirteenthirteenthfourteenfourteenthfifteenfifteenthsixteensixtee

4、nthseventeenseventeentheighteeneigthteenthtwenty-onetwenty-firstthirty-twothirty-secondforty-threeforty-thirdfifty-fourfifty-fourthsixty-fivesixty-fifthseventy-sixseventy-sixtheighty-seveneighty-seventhninety-eightninety-eighthtwentytwentiethonefirstsecondtwothreethirdfourfourthfivefiftheigh

5、teighthnineninthtwentytwentieth基数词变序数词口诀基变序有规律，一、二、三，特殊记；八去t,九去e;字母f代ve;整十数ty变成tie,th加在后面别忘记；若要遇到几十几，十位基，个位序。序数词前the来放，千万牢记不要忘！1stfirst2ndsecond3rdthird5thfifth8theighth12thtwelfth9thninth下一页上一页twenty-onetwenty-firsttwenty-twotwenty-secondtwenty-threetwenty-thirdthirty-onethirty-firstfifty-t

6、wofifty-secondninety-threeninety-third基数词变序数词表示顺序的数词叫序数词。基数词变序数词的规则是：（1）大部分数词在词尾加th：如:fourth（第四）thirteenth（第十三）hundredth（第一百）（2）表示整十的基数词，变y为ie，再加eth;如：twentieth第二十eightieth第八十（3）特殊的序数词有:第一first,第二second，第三third，第五fifth,第八eighth,第九ninth，第十二twelfth下一页上一页(4)要把一个“几十几”，“几百几”的基数词变成序数词，只需把个位数变成序数词。

7、如:32---thirty-second256---twohundredandfifty-sixth(5)在表示编号的东西时，可以用基数词表示，也可用序数词表示如:thefirstlesson=LessonOnethesixthgrade=GradeSix下一页上一页你能说出下列日期的英文表达并写下来？1.3月12日2.8月8日3.1月5日4.7月20日5.12月1日6.9月9日7.4月3日8.11月2日9.2月14日10.5月30日11.6月23日12.10月21日March12thAug