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1、Unit 4 When is Easter?,B Lets learn Ask and answer,second,first,fourth,June 4th,February 2nd,fifth,August 1st,third,3rd,January 3rd,July 5th,4th,1st,2nd,5th,Flash game,math test,April 4thSports meet,When is the_?Its on _.,表示数目顺序的词叫序数词。例如:第一，第二，,序 数 词,first,second,third,fourth,第二,第三,第四,第一,fifth(ve变f)
2、,第五,sixth,seventh,eighth（-t）,第六,第七,第八,ninth(-e),第九,tenth,第十,特殊变化的：第一，第二，第三（结尾t,d,d），第五，ve要用f替）；第八（减t），第九(减e),其他的序数词要在基数词后面+th,基数词变序数词规则,eleven,twelve,thirteen,fourteen,eleventh,twelfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth,sixteen,seventeen,eighteen,nineteen,fif
3、teen,在11-19的序数词里面，只有第十二的变化最为特殊，twelfth,1)在第1到第19之间：特殊变化的：第一，第二，第三，第五，第八，第九,第十二2）其他的序数词要在基数词后面+th,基数词变序数词规则,整十的数,twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety,序 数 词,十位整数的序数词的构成方法:是将十位整数的词尾-y,变成 i和e 再加 th;例如：twenty-twentieth,十位整数变序数词,twentieth,thirtieth,fortieth,fiftieth,sixtieth,seventieth,ei
4、ghtieth,ninetieth,序 数 词,几十几（例如32，68等）序数词变化方法：只是把个位数变成相应的序数词,十位数不变例如：21:53:66:,twenty-one,fifty-three,sixty-six,When is _?Its on _,New years Day,February 1st,April Fools Day,April 1st,Childrens Day,June 1st,Chinas National Day,October 1st,May Day,May 1st,When is Tree Planting Day?Its on March 12th.,W
5、hen is Christmas?Its on December 25th.,When is your birthday?,Its on August 21st.,twenty-first,21st,twenty-one,February 21st,Dec.21st,When is grandpas birthday?,Its on October 12th.,12th,twelfth,twelve,April 12th,Sept.12th,January 12th,When is grandmas birthday?,Its on April 20th.,twentieth,20th,twe
6、nty,August20th,March20th,Oct.20th,When is Dads birthday?,Its on November 30th.,thirtieth,30th,thirty,July30th,March30th,June30th,When is Mums birthday?,Its on February 23rd.,twenty-third,23rd,twenty-three,April 23rd,May 23rd,Nov.23rd,twenty-third,twelfth,twenty-first,thirtieth,twentieth,twenty-third
7、,twelfth,twenty-first,thirtieth,twentieth,23rd,12th,21st,30th,20th,Wu 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 on,When is _?Its on _(this year),1、背诵变序数词的相关规则。2、背诵、抄写P42的句子，每个句子 两遍。,Homework,
