五年级下册英语课件Unit4WhenisEasterPartB4人教PEP22.ppt

Unit4WhenisEaster?,BLetslearn,1st,one,two,three,four,five,first,second,third,fourth,fifth,2nd,3rd,4th,5th,1,2,3,4,5,Howmanyballscanyousee?,twelfth,第十二（的）,12th,twelfth,twelve,WhenisGrandpasbirthday?,ItsonOctober12th.,把ve变成f再加th,twentieth,第二十（的）,20th,twentieth,twenty,WhenisGrandmasbirthday?,ItsonApril20th.,把y变成ie再加th,thirtieth,第三十（的）,30th,thirtieth,thirty,WhenisDadsbirthday?,ItsonNovember30th.,把y变成ie再加th,twenty-third,第二十三（的）,23rd,twenty-third,twenty-three,WhenisMumsbirthday?,ItsonFebruary23rd.,几十几只变个位数,twenty-first,第二十一（的）,21st,twenty-first,twenty-one,Whenisyourbirthday?,ItsonAugust21st.,几十几只变个位数,twelfth,twentieth,twenty-third,thirtieth,twenty-first,twenty-two,twenty-second,基变序，有规律：一般都是在基数词的末尾加上th发音|特殊情况：1，一、二、三、特殊记，八去t,九去e,ve要用f替，最后th加上去.2，整十去y变ie,然后再加th.3，若是遇到几十几，只变个位就可以。,基数词：1，2，3序数词：第一，第二，第三,twentytwentieth20ththirtythirtieth30th,第一、二、三特殊记,一般是在基数词的末尾加th,基数词末尾ve要用f替，再加th,八去t，九去e，再加th,整十基数变序数，末尾y改为ie，再加th,基数词序数词序数词缩写,onefirst1sttwosecond2ndthreethird3rd,fourfourth4thsevenseventh7th,fivefifth5thtwelvetwelfth12th,eighteighth8thnineninth9th,Whatsmissing,twelfth,twenty-first,22nd,30th,thirtieth,12th,20th,twenty-third,21st,October24th,Sept.21st,July12th,June23rd,Lookandwrite,Whenisyourbirthday?,Mybirthdayison.,一、写出下列单词的完全形式,(1)12th(2)20th(3)30th(4)21st(5)23rd,(1)twelfth,(2)twentieth,(3)thirtieth,(4)twenty-first,(5)twenty-third,1.is,when,birthday,your,brothers(?)2.uncles,my,in,is,July,birthday(.)3.is,December12th,on,birthday,ZhangPengs(.),Whenisyourbrothersbirthday?,MyunclesbirthdayisinJuly.,ZhangPengsbirthdayisonDecember12th.,二、Putthe