序数词的用法.ppt

序数词的用法.ppt

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Unit5Dates,months,JanuaryJulyFebruaryAugustMarchSeptemberAprilOctoberMayNovemberJuneDecember,AprilJuneSeptemberNovember,JanuaryMarchMayJulyAugustOctoberDecember,February,Filltheblank,ChildrensDayisin_ChristmasDayisin_TeachersDayisin_Summerholidayisin_and_,June,December,September,July,August,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,four-fourthfive-fifthsix-sixthseven-seventheight-eighthnine-ninth,ten-tentheleven-eleventhtwelve-twelfththirteen-thirteenthfourteen-fourteenthfifteen-fifteenth,序数词是由基数词后加-th变化而来。

几个特殊变化的序数词,1five-fifth2twelve-twelfth3eight-eighth4nine-ninth,基变序有规律，词尾加上th，特殊例子特殊记,整十的序数词把y变成i加-eth,1twenty-twentieth2thirty-thirtieth3forty-fortieth4fifty-fiftieth,你能写出sixtyseventyeightyninety的序数词吗？

整十的序数词,你对了吗？

1.Sixty-sixtieth2.seventy-seventieth3.eighty-eightieth4,ninety-ninetieth,几十几的序数词，十位数不变，个位数变成序数词。

1.twenty-one21-twenty-first21st2.twenty-two22-twenty-second22nd,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，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）中读清辅音如：

three,third,fourth大部分位于词首读清辅音thank,thin,thing,thirsty,Thursday.以th结尾的单词，发清辅音bath,both,tooth在复合词中,th读音与原词中的读音相同如Something,anything,nothing,thefirstdayofJanuary-January1st-（Januarythefirst）,theseconddayofJanuary-January2nd-（Januarythesecond）,thetwenty-firstdayofJanuary-,January21st-（Januarythetwenty-first）,thefifthdayofJanuary-,January5th-（Januarythefifth）,theeleventhdayofJanuary-,January11th-（Maytheeleventh）,日期的表达date,Whatsthedatetoday?

Its_,October13th.,WhenisTeachersDay?

ItsonSept.10th.,WhenisChildrensDay?

ItsonJune1st.,WhenisChristmasDay?

ItsonDecember25th,HisbirthdayisonJuly13th,（1983.7.13）,Liuxiang,Whenishisbirthday?

（1980.9.12）,Whenishisbirthday?

HisbirthdayisonSeptember12th.,YaoMing,Whenisyourbirthday?

Itson_.,Homework,1.抄73U4黑体单词

（2）2.同步543.同步作文写在一张纸上4.状元坊订正59，60，做61，625.完成双行本6.读3845，背诵45的一句谚语,