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1、（人教PEP）五年级英语下册课件,Unit3Mybirthday,序数词学习,表示次序的数词叫序数词，是由基数词变化而来的。,1one-first2two-second3three-third4其余的序数词是由基数词后加-th变化而来。,几个特殊变化的序数词,1five-fifth2twelve-twelfth3eight-eighth4nine-ninth,整十的序数词把y变成i加-eth,1twenty-twentieth2thirty-thirtieth3forty-fortieth4fifty-fiftieth5你能写出sixtyseventyeightyninety的序数词吗？,你对
2、了吗？,1.Sixty-sixtieth2.seventy-seventieth3.eighty-eightieth4,ninety-ninetieth,几十几的序数词，十位数不变，个位数变成序数词。,1.twenty-one21-twenty-first21st2.thirty-two32-thirty-second32nd3.ninety-nine99-ninety-ninth99th4.请写出66834855的序数词。,日期的表达date,Whatsthedatetoday?ItsMarch28th.,（1879.3.14-1955.4.),Einstein,HisbirthdayisMarch14th.,LuXunHisbirthdayisSept.25th,(1881.9.25-1936.10.19),Whenisyourbirthday?,Its_.,WhenisTeachersDay?,ItsSept.10th.,WhenisChildrensDay?ItsJune1st.,WhenisChristmasDay?,ItsDec.25th,Goodbye！,