Unit4Whenistheartshow?BLet’sLearn汕頭市潮陽海門坑尾小學(xué)黃希文HowmanyfamilymembersarethereinWuBinbin’sfamily?Five.Whoarethey?motherfathergrandpagrandmaWhenis...’sbirthday?onefirsttwosecondthreethirdfourfourthfivefifthsixsixthsevenseventheighteighthnineninthtententheleveneleventh11twelvetwelfth12thirteenthirteenth13fourteenfourteenth14fifteenfifteenth15sixteensixteenth16seventeenseventeenth17eighteeneighteenth18nineteennineteenth19twentytwentieth20twentyonetwentyfirst21twentytwotwentysecond22twentythreetwentythird23Let’slearnWhenisGrandpa’sbirthday?It’son___________.October12thGrandpa’sbirthdaytwelveOctober12thPresentationWhenisGrandma’sbirthday?It’son___________.April20thGrandma’sbirthdaytwentyApril20thWhenisDad’sbirthday?It’son___________.November30thDad’sbirthdaythirtyNovember30thWhenisMum’sbirthday?It’son___________.February23rdMum’sbirthdaytwenty-threeFebruary23rdWhenisyourbirthday?It’son___________.August21stMybirthdaytwenty-oneAugust21stCanyoureadthesenumbers?24252627282924th25th26th27th28th29th

thirtythirtieth30Canyoureadthesenumbers?31st

32nd

33rd

34th

35th

......WuBinbin’sbirthdayison__________.Grandpa’sbirthdayison___________.Grandma’sbirthdayison_________.Dad’sbirthdayison_____________.Mum’sbirthdayison____________.August21stOctober12thApril20thNovember30thFebruary23rdFillintheblanksWhenisyourbirthday?

Mybirthdayison……Whenisyourmum’sbirthday?Howaboutyourdad?Yourgrandpaandgrandma?Whenisyourmum’s/dad’s/grandpa’s/grandma’sbirthday?Mymum’s/dad’s/grandpa’s/grandma’sbirthdayison……基數(shù)詞→序數(shù)詞的變化規(guī)則特殊情況(不規(guī)則變化)12358912基數(shù)詞序數(shù)詞onefirsttwosecondthreethirdfivefiftheighteighthnineninthtwelvetwelfth除特殊情況外，4~19的序數(shù)詞一般直接在詞尾加thfour→

nineteen→以ty結(jié)尾的整十?dāng)?shù)的基數(shù)詞要先變詞尾的y為ie，再加thtwenty→ninety→fourthnineteenthtwentiethninetieth20以上非整十的兩位數(shù)只將個(gè)位數(shù)變?yōu)樾驍?shù)詞twenty-one→ninety-seven→twenty-firstninety-seventh數(shù)字+序數(shù)詞的最后兩個(gè)字母序數(shù)詞縮寫的構(gòu)成Trytoread1st2nd3rd4th12th13th14th15th16th17th18th19th20th21st22nd23rd24th25th26th27th28th29th30th31stLookandwriteWhenisyourbirthday?MybirthdayisonMarch21st.LookandsayOctober20thJackRoseJanuary23rdAugust4thMaryApril16thMrLiuMarch15thMissWang—Whenis...’sbirthday?—It’son...GroupworkWhenisyour/yourfather’s/...birthday?...‘sbirthdayison.../It’son...Exercises一、寫出下列基數(shù)詞對應(yīng)的序數(shù)詞。(1)five________(2)six________(3)twenty-one____________(4)thirty-two_____________fifthtwenty-firstthirty-secondsixth(1)12th__________