人教PEP版英语五下Unit3MyBirthday课件之四.ppt

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。one-----first1two------second2three----third3其余的序数词是由基数词后加-th变化而来。4nine----nintheight----eighthtwelve----twelfthfive----fifthCBAD几个特殊变化的序数词整十的序数词把y变成i加-ethtwenty----twentieththirty----thirtiethforty----fortiethfifty-----fiftieth你能写出sixtyseventyeightyninety的序数词吗？01.Sixty----sixtieth02.seventy---seventieth03.eighty----eightieth04.4,ninety----ninetieth你对了吗？几十几的序数词，十位数不变，个位数变成序数词。twenty-one21----twenty-first21stthirty-two32-----thirty-second32ndninety-nine99----ninety-ninth99th.请写出66834855的序数词。日期的表达dateIt’sMarch28th.What’sthedatetoday?BAHisbirthdayisMarch14th.（1879.3.14-1955.4.)EinsteinLuXunHisbirthdayisSept.25th(1881.9.25-1936.10.19)It’s_______.Whenisyourbirthday?