新pep小学英语五年级下册第四单元第四课时unit4_when_is_easter_b_let 39;s_learn.ppt

When is Mum’s birthday? It’s on February 23rd. 点击标题打开word文档，详细了解相关知识。 点击标题打开word文档，详细了解相关知识。 Unit 4 When is Easter ? B Let’s 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 Dec. 1st Chinese test English test July 5th April 4th Sports meet Oct. 3rd school trip When is the_____________? It’s on __________________. Mar. 2nd Singing contest 表示数目顺序的词叫序数词。 例如:第一，第二，…… first second third fourth 第二 第三 第四 第一 fifth (ve变f) 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 数字 11 12 13 14 基数词 序数词 eleven twelve thirteen fourteen eleventh twelfth thirteenth fourteenth 15 16 17 18 19 fifteenth sixteenth seventeenth eighteenth nineteenth sixteen seventeen eighteen nineteen fifteen 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 数字 20 30 40 50 基数词 twenty thirty forty fifty 数字 60 70 80 90 基数词 sixty seventy eighty ninety 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　　　　 基数词 twenty thirty forty fifty 序数词 twentieth thirtieth fortieth fiftieth 基数词 sixty seventy eighty ninety 序数词 sixtieth seventieth eightieth ninetieth 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 twenty-first fifty-three fifty-third sixty-six sixty-sixth When is ___________________? It’s on ____________________ New year’s Day February 1st April Fool’s Day April 1st Children’s Day June 1st China’s National Day October 1st May Day May 1st When is Tree Planting Day ? It’s on March 12th . When is Christmas ? It’s on December 25th. When is your birthday? It’s on August 21st. twenty-first 21st twenty-one February 21st Dec. 21st When is grandpa’s birthday? It’s on October 12th. 12th twelfth twelve April 12th Sept. 12th January 12th When is grandma’s birthday? It’s on April 20th. twentieth 20th twent