(人教PEP)五年级英语下册课件-Unit.ppt

（人教PEP）五年级英语下册课件,Unit 3 My birthday,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。,1 one-first2 two-second3 three-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,1 five-fifth2 twelve-twelfth3 eight-eighth4 nine-ninth,整十的序数词把 y 变成 i加-eth,1 twenty-twentieth2 thirty-thirtieth3 forty-fortieth4 fifty-fiftieth5 你能写出 sixty seventy eighty ninety 的序数词吗？,你对了吗？,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-one 21-twenty-first 21st2.thirty-two 32-thirty-second 32nd3.ninety-nine 99-ninety-ninth 99th4.请写出66 83 48 55的序数词。,日期的表达 date,Whats the date today?Its March 28th.,（1879.3.14-1955.4.),Einstein,His birthday isMarch 14th.,Lu Xun His birthday is Sept.25th,(1881.9.25-1936.10.19),When is your birthday?,Its _.,When is Teachers Day?,Its Sept.10th.,When is Childrens Day?Its June 1st.,When is Christmas Day?,Its Dec.25th,Goodbye！,