序数词的用法课件.pptVIP

monthsJanuaryFebruaryMarchAprilJulyAugustSeptemberOctoberMayNovemberDecemberJune

AprilJuneSeptemberNovemberJanuaryMarchMayJulyAugustOctoberDecemberFebruary

FilltheblankJuneChildren’sDayisin_________DecemberChristmasDayisin_________SeptemberTeachers’Dayisin_________JulySummerholidayisin______and_A__u_g_u_st

基数词变序数词加th,1、2、3要死记，9去e，8减t,f来把ve替，y要变ie,几十几只变个位就可以。

基变序，有规律：1、2、3特殊例，结尾各是t,d,d;th,4加起，8加h,9去e;y结尾改ie,ve要用f替，再加th莫迟疑；若是遇到几十几，只变个位就可以。

表示次序的数词叫序数词，是由基数词变化而来的。1one-----first2two------second3three----third

ten-----------tenthfour------fourthfive------fiftheleven-------eleventhtwelve-------twelfththirteen------thirteenthfourteen------fourteenthfifteen--------fifteenthsix--------sixthseven-----seventheight------eighthnine-------ninth序数词是由基数词后加-th变化而来。

基变序有规律，词尾加上th，特殊例子特殊记几个特殊变化的序数词1five----fifth2twelve----twelfth3eight----eighth4nine----ninth

整十的序数词1twenty----twentieth2thirty----thirtieth3forty----fortieth4fifty-----fiftieth整十的序数词把y变成i加-eth你能写出sixtyseventyeightyninety的序数词吗？

你对了吗？1.Sixty----sixtieth2.seventy---seventieth3.eighty----eightieth4,ninety----ninetieth

1.twenty-one21----twenty-first21st2.twenty-two22---twenty-second22nd几十几的序数词，十位数不变，个位数变成序数词。请写出232431的序数词。

基数词和序数词基数词：表示数量的词。序数词：表示顺序的词。在表示：年月日是，‘年’用基数词。如：1976年4月1日。写成：April1st,1976.读作：Aprilthefirst,nineteenseventy-six

读分数时，分子用基数词，分母用序数词，除了分子是1的情况下外，分母用单数，其他情况下，分母都用复数形式。书写时要加连词号。如：1/3读作：one-third,2/3读作：two-thirds52/3读作：fiveandtwo-thirds

th发音规则在th后以字母er或ern结尾的单词中，或者最后一个是不发音的e时，th发浊辅音「e」，如：mother,father,brother,weather.Leather,further,southern,northern,either,bathe,breathe.一般情况下，th字母在代词，冠词，介词，连词中读浊辅音「e」This,that,these,those,they,them,,their,the,than,then,….

th在数词(基数词和序数词）中读清辅音「θ」如：three,third,fourth…大部分位于词首读清辅音「θ」thank,thin,thing,thirsty,Thursday..以th结尾的单词，发清辅音「θ」bath,both,tooth…在复合词中,th读音与原词中的读音相同如「θ」Something,anything,nothing

thefirstdayofJanuary----January1st----(Januarythefirst)theseconddayofJanua