初中教育英语数词复习.pptx

v数词的用法数词的用法数词分数词分基数词基数词和和序数序数词词。基数词表示数目，。基数词表示数目，序数词表示顺序。序数词表示顺序。r基数词的用法基数词的用法ThirtyofthemarePartymembers.（）-Howmanywouldyoulike？-Three,please()(1)分析以下句子中基数词在句中基数词在句中的成分的成分ThenineboysarefromTianjing.（）Sixplusfouristen.（）Wefourwillgowithyou.（）r 基数词的用法(2)表示一个具体数字时，表示一个具体数字时，hundred,thousand,million,billion,dozen,score一律不用复数；一律不用复数；在在与与of短语短语连用，表示概数连用，表示概数时，则用复数。时，则用复数。例如例如：r基数词的用法基数词的用法Ourcountryhasapopu-lationof1,300millionpeople.r基数词的用法基数词的用法WehaveplantedmillionsoftreesinSanBei.(表示具体数字表示具体数字)(表示不确定数字表示不确定数字)Afterthewar,thousandsofpeoplebecamehome-less.r基数词的用基数词的用法法Therearethreethousandstudentsinourschool.(表示不确定数字表示不确定数字)(表示具体数字表示具体数字)(3)(3)基数词基数词中表示中表示“几十几十”的的复复 数形式可以表达人的岁数数形式可以表达人的岁数或年代或年代HeisinhislatethirtiesHediedinhisfortiesThistookplaceinthe1930s他快满四十了。他快满四十了。(4)表示时刻用表示时刻用基数词基数词。Wegetupatsix.Theworkersbeginworkateight.J表示表示“几点几点过过几分几分”，用介词，用介词past,但须在半小时以内。但须在半小时以内。tenpastten 10:109:1512:30aquarterpastninehalfpasttwelveJ表示表示“几点几点差差几分几分”用介用介词词 to,但分数须在半小时以但分数须在半小时以上。上。twentytoninefivetoeightaquartertoten8:407:559:45sevenfifteenJ表示表示“几点几分几点几分”还可直接用还可直接用基基 数词数词。eleventhirtynineforty7:15=a quarter past seven11:30=half past eleven9:40=twenty to tenr序数词的用法序数词的用法(1(1）序数词序数词主要主要用作定语，前面用作定语，前面要加定冠词，例如：要加定冠词，例如：ThefirsttruckiscarryingalotofbasketsJohnlivesonthefifteen-thfloor(2)序数词序数词有时前面可加有时前面可加不定冠不定冠词来表示词来表示“再一再一”，“又一又一”这这 样的意思，例如：样的意思，例如：WellhavetodoitasecondtimeShallIaskhimathirdtime？WhenIsatdown，afourthmanrosetospeak(3(3）由几个由几个序数词序数词和和基数词基数词在拼在拼写时不对应，很容易写错，写时不对应，很容易写错，应特别注意。它们是：应特别注意。它们是：one-first two-second three-third five-fifth eight-eighth nine-ninth twelve-twelfth(4)表示年，月，日时，表示年，月，日时，年用年用基基数词数词表示，日用表示，日用序数词序数词表示。表示。1960年十月一日读作年十月一日读作:October(the)first,nineteen sixty2004年九月十日读作：年九月十日读作：September(the)tenth,two thousand and four(5)表示分数时，表示分数时，分子分子用基数词表用基数词表示，示，分母分母用用序数词序数词表示。分子表示。分子大于大于1时，分母加时，分母加-s。threefourthsonesecondtwofifths3/41/22/5（6）序数词有时用缩写形）序数词有时用缩写形式：式：first1stsecond2ndthird3rdfourth4thtwenty-second22ndthirty-first31stfifty-third53rda.主语+谓语+倍数（或分数）+as+adj.+as。译：我有你三倍那么多 b.主语+谓语+倍数（分数）+the size（amount，length，width,height）of。译：地球是月球的49倍。c.主语+谓语+倍数（分数）+形容词（副词）比较级+than。译：今年比去年粮食产量增加8%。r 倍数表达法倍数表达法I have three times as many as you.The earth is 49 times the size of the moon.The grain output is 8 percent higher this year than that of last year.d.还可以用by+倍数，表示增加多少倍。译：今年粮食产量增加了4倍。The production of grain has been increased by four times this year.1About_studentsinourclasscandescribethatplaceinEnglish.A.three-fifthsB.three-fifthC.third-fiveD.third-fifths2.Nine_poundsaweek?Thatsverygood.A.hundredofB.hundredsofC.hundredsD.hundred3.-Whichisthesmallest3.-Whichisthesmallest numberofthefour?numberofthefour?-_.-_.A.Two-thirdsB.AhalfTwo-thirdsB.AhalfC.AquarterC.AquarterD.Three-fourthsD.Three-fourthsADC4.Weallthinkthatthe_centurywillbringusmorehopes.A.twenty-firstB.twentieth-firstC.twenty-oneD.twentieth-one5.A_schoolboy,LiLida,firsttriedtocrossthe5.A_schoolboy,LiLida,firsttriedtocrosstheQiongzhouChannelinJunem2000.QiongzhouChannelinJunem2000.A.12-year-oldB.12-years-oldC.12-years-old12-year-oldB.12-years-oldC.12-years-old s s6.Bothofthetworulers6.Bothofthetworulers arebroken.Iwanttoarebroken.Iwanttobuya_one.buya_one.A.threeA.three B.thirdB.thirdC.forthC.forthD./D./7._martyrshaveheroicallylaiddowntheir7._martyrshaveheroicallylaiddowntheirlivesforthepeople.livesforthepeople.a.a.ThousanduponthousandofThousanduponthousandofb.b.b.Thousandandthousandsofb.Thousandandthousandsofc.Thousandsuponthousandsofc.ThousandsuponthousandsofAABC8.hey received _ of letters about their TV programs.A.dozen B.dozen and dozen C.score D.Dozens9.Who is that man,_ in the front row?A.one B.the one C.first D.the first10.We have produced _ this year as we did in 1993.A.as much cotton twice B.as twice much cottonC.much as twice cotton D.twice as much cottonDDD11.The earth is about _ as the moon.11.The earth is about _ as the moon.A.as fifty time big B.fifty times as big A.as fifty time big B.fifty times as big C.as big fifty time D.fifty as times bigC.as big fifty time D.fifty as times big12.The moon is about _ in diameter as diameter 12.The moon is about _ in diameter as diameter as the earth.as the earth.A.one-three as large B.one three as large A.one-three as large B.one three as large C.one-third as large D.one third as largeC.one-third as large D.one third as large13.Five hundred yuan a month _ enough to live 13.Five hundred yuan a month _ enough to live on.on.A.is B.are C.is being D.has beenA.is B.are C.is being D.has been14._ of the buildings were ruined.14._ of the buildings were ruined.A.Three fourth B.Three four A.Three fourth B.Three four C.Three-fourths D.Three-fourC.Three-fourths D.Three-fourBCAC翻译句子l l1.我的房间是她的房间的2倍。l l2.这所大学十分之三的学生来自南方。l l3.那个男孩买了几十支铅笔。l l4.他30多岁时去了美国。My room is twice as large as hers.My room is twice as large as hers.Three students out of ten in this university come from the south.The boy bought dozens of pencils.He went to America in his thirties.v 句子改错句子改错：下面各句画线部分中有一下面各句画线部分中有一处错误，请指出并改正。处错误，请指出并改正。1.Mayisafifthmonthoftheyear.2.Thefilmhasbeenonforhalfahour.the an3.Theboysandthegirlsoftenplaythefoot-ballintheafternoon.4.Itsgoingtorain.Whynottakeaumbrellawithyou?an play5.LiMeioftengivesussomegoodinformationbythee-meil.6.Weveplantedtwohundredstreesinthecentreofourcitythisyear.by hundred7.Fivemillionofdollarsisalotofmoney.8.Therearethousandofchildrenintheparknow.thousands9.Bytheendofthetwentycentury,theworldpopulationhadpassedsixbillion.twentieth10.Overthreefifthoftheworldsbooksand newspapersarewritteninEnglish.threefifths用数词的适当形式填空 1.As the (twenty)century came to a close，the raw materials for a great national literature were at hand，waiting to be used.2.The boss said we had only three days to finish the work.Dont worry.We have already got through two (three)of it.3.Two (five)of the land in that district is covered with trees and grass.twentieth thirds fifths