小升初数词精讲

一、数词的概念表示人或事物的数目和顺序的词是数词。如：eight8nineteen19sixty-six66first第一tenth第十twenty-seventh第二十七二、数词的分类数词分为基数词和序数词。1.基数词（1）1-19的基数词onetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteen(2)20-90的整十数基数词twentythirtyfortyfiftysixtyseventyeightyninety(3)非整十数基数词(十位和个位数之间用连字符号“-”)Twenty-threeforty-fourninety-nine（4）101-999的基数词①整百基数词fivehundred500eighthundred800②非整百基数词onehundredandone101threehundredandsixty-five365（5）1000以上的基数词fivethousand5,000ninethousandninehundredandninety-nine9,999thirtythousand30,000（6）年代的读法：每两位数读一读1997nineteenninety-seven2010twothousandandten请读一读下面的句子Therewere450sheepand83cowsinthefarmin2005.读作：Therewerefourhundredandfiftysheepandeighty-threecowsinthefarmintwothousandandfive.2.序数词（1）1-19的序数词first第一1stsecond第二2ndthird第三3rdfourth第四4thfifth第五5thsixth第六6thseventh第七7theighth第八8thninth第九9thtenth第十10theleventh第十一twelfth第十二thirteenth第十三fourteenth第十四fifteenth第十五sixteenth第十六seventeenth第十七eighteenth第十八nineteenth第十九（2）20-90的整十数序数词：基数词词尾y变成i,再加eth/IT/twentieth第二十thirtieth第三十fortieth第四十fiftieth第五十sixtieth第六十seventieth第七十eightieth第八十ninetieth第九十twenty-eighth第二十八28ththirty-third第三十三33rdeighty-first第八十一81sttwohundredandfifty-fourth第二百五十254th（3）非整十数序数词三、数词的用法1.基数词的用法（1）编号的事物用基数词如：SheistheNo.one.她是第一名。TodaywearegoingtolearnLessonThree.（2）表示时间时用基数词。如：eighto’clock8点eleventwenty-five十一点二十五分（可从前到后依次读）twentytoeleven十点四十分（分针大于30，可用to)aquarterpastseven七点一刻(分针小于或等于30，可用past)（3）表示年龄时用基数词如：Heistwenty.他二十岁了。Whenshewassix,shewenttoprimaryschool.当她六岁时，她上了小学。（4）一些数学公式的读法4+9=13：Fourplus/andnineisthirteen.15-7=8:Fifteenminusseveniseight.2.序数词的用法⑴序数词主要用作定语、表语。前面要加定冠词the.Thethirdchairisbetterthanthesecond.第三把椅子比第二把好。⑵表示日期的读法9月10日读作：September(the)tenth或thetenthofSeptember.Exercises一、把下列基数词改成序数词one.five.thirty.twelvetwenty-two.firstfifththirtiethtwelfthtwenty-second二、选择题1.-Whattimeisitnow?-It’s.A.No.6B.sixteno’clockC.halfpastsix2.TherearedaysinJanuary.A.29B.30C.313.-Howmuchisthecoat?-It’s.A.thirtyo’clockB.thirtyyuanC.thirtyyearsold4.-Whichclassareyouin?-.A.I’mtwo.B.I’minclasstwo.C.I’minClassTwo.5.-Whenisyourbirthday?-.A.It’sonthe10thofJuly.B.It’son10ofJuly.C.It’s10ofJuly.6.Icanseesixorangesinthebagandeightorangesinthebox.IhavegotorangesA.fortyB.fourteenC.fourteenth7.IamTom.Ihavetwobrothers.Myparentshavesons.A.oneB.twoC.three8.Myparentshavethreechildren.Mybrotherisolderthanme,andmysisterisyoungerthanme.Iamthechildofmyparents.A.thirdB.secondC.two9.-Howmanystarsarethereinournationalflag(国旗)?-Thereare.A.fourB.fiveC.six10.ChinaholdOlympicGamessuccessfully.A.thetwenty-ninthB.twenty-ninethC.thetwenty-eighth11.Todayisofthenewterm.Allthestudentsarehappytoseeeachother.A.oneB.firstC.thefirst12.Sundayisthedayofaweek.A.firstB.lastCsecond13.Thetwelfthmonthinayearis.A.NovemberB.DecemberC.October14.-HowcanIgettothesupermarket?-Goalongthestreetandturnleftatcrossing.A.thesecondB.twoC.second15.Hisbirthdayison.A.1995,April6B.Aprilsix,1995C.April6,1995