五下册第四单元BLEARN(精品).ppt

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1、Unit 4 When is Easter?B Lets learn Ask and answersecondfirstfourthJune 4thFebruary 2ndfifthAugust 1stthird3rdJanuary 3rdJuly 5th4th1st2nd5thFlash gamemath testDec.1stChinese testEnglish test July 5thApril 4thSports meetOct.3rdschool tripWhen is the_?Its on _.Mar.2ndSinging contest表示数目顺序的词表示数目顺序的词叫叫序

2、数词。序数词。例如例如:第一，第二，第一，第二，firstsecondthirdfourth第二第二第三第三第四第四第一第一fifth(ve变变f)第五第五sixthseventheighth（-t）第六第六第七第七第八第八ninth(-e)第九第九tenth第十第十 u特殊变化的：第一，第二，第三（结尾特殊变化的：第一，第二，第三（结尾t,d,d），第五，），第五，ve要用要用f替）；第八（减替）；第八（减t），），第九第九(减减e),u其他的序数词要在基数词后面其他的序数词要在基数词后面+th数字11121314基数词序数词eleventwelvethirteenfourteeneleve

3、nthtwelfththirteenth fourteenth1516171819fifteenthsixteenthseventeentheighteenth nineteenthsixteenseventeeneighteennineteenfifteen在在11-19的序数词里面，的序数词里面，只有只有第十二第十二的变化最为特殊，的变化最为特殊，twelfth1)在第在第1到第到第19之间：之间：特殊变化的：第一，第二，第三，第五，特殊变化的：第一，第二，第三，第五，第八，第九第八，第九,第十二第十二2）其他的序数词要在基数词后面）其他的序数词要在基数词后面+th数字20304050 基

4、数词twenty thirtyfortyfifty数字60708090基数词sixtyseventy eighty ninety十位整数十位整数的序数词的构成方法的序数词的构成方法:是将十位整数的词尾是将十位整数的词尾-y,变成变成 i和和e 再加再加 th;例如：例如：twenty-twentieth基数词基数词 twenty thirty forty fifty序数词序数词twentieth thirtiethfortiethfiftieth基数词基数词 sixty seventy eighty ninety序数词序数词 sixtiethseventietheightiethninetie

5、th几十几（例如几十几（例如32 32，6868等）序数词变化方法：等）序数词变化方法：只是把只是把个位数个位数变成变成相应的相应的序数词序数词,十位数不变十位数不变例如：例如：21:21:53:53:66:66:twenty-onetwenty-firstfifty-threefifty-thirdsixty-sixsixty-sixthWhen is _?Its on _New years DayFebruary 1stApril Fools DayApril 1stChildrens DayJune 1stChinas National DayOctober 1stMay DayMay

6、1stWhen is Tree Planting Day?Its on March 12th.When is Christmas?Its on December 25th.When is your birthday?Its on August 21st.twenty-first21sttwenty-oneFebruary 21stDec.21stWhen is grandpas birthday?Its on October 12th.12th twelfthtwelveApril 12thSept.12thJanuary 12thWhen is grandmas birthday?Its o

7、n April 20th.twentieth20thtwentyAugust20thMarch20thOct.20thWhen is Dads birthday?Its on November 30th.thirtieth30ththirtyJuly30thMarch30thJune30thWhen is Mums birthday?Its on February 23rd.twenty-third23rdtwenty-threeApril 23rdMay 23rdNov.23rdtwenty-third twelfthtwenty-firstthirtiethtwentiethtwenty-

8、third twelfthtwenty-firstthirtiethtwentieth23rd 12th21st30th20thWu yifans birthday is on August 21st.Grandpas birthday is on October 12th.Grandmas birthday is on April 20th.Dads birthday is on November 30th.Mums birthday is on February 23rd.When is your birthday?My birthday is on_When is your/your fathers/your mothers birthday?My birthday is on/Its onWhen is _?Its on _(this year)1、背诵变序数词的相关规则。、背诵变序数词的相关规则。2、背诵、抄写、背诵、抄写P42的句子，每个句子的句子，每个句子 两遍。两遍。