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专题四数词考点一基数词考点突破考点二序数词考点一基数词考点突破基数词的构成和用法1.基数词的构成基数词用来表示精确的数量,100以下的基数词:1—911—19整十整十之间oneeleventen—twotwelvetwentytwenty-twothreethirteenthirtythirty-threefourfourteenfortyforty-fourfivefifteenfiftyfifty-fivesixsixteensixtysixty-sixsevenseventeenseventyseventy-seveneighteighteeneightyeighty-eightninenineteenninetyninety-nine2.基数词的用法(1)在表示“几百、几千、几百万”等确切的数字时,直接用“基数词+hundred/thousand/million”;表示“成百、数千、上百万”等不确切的数字时,则用hun-dreds/thousands/millionsof表达。如:Therearetwohundredpeopleinthehall.大厅里有200个人。Therearehundredsofpeopleinthehall.大厅里有数以百计的人。(2)表示“不确切岁数或年代”用几十的复数形式,结构为“in+one's+整十的复数”,“in+the+年代-s”。如:Hebecameaprofessorinhisforties.他四十多岁时成了一名教授。Itwasinthe1960s.那是在20世纪60年代。(3)表示顺序。由“单数名词+基数词”构成,此时名词和基数词的第一个字母需大写。如:GradeNine九年级;Room105105房间考点二序数词序数词的构成和用法1.序数词的构成序数词用来表示顺序,一般在基数词后加后缀-th构成,但也有特殊的情况。基数词序数词数字写法onefirst1sttwosecond2ndthreethird3rdfourfourth4th基数词序数词数字写法fivefifth5thsixsixth6thsevenseventh7theighteighth8thnineninth9thtententh10theleveneleventh11thtwelvetwelfth12thtwentytwentieth20thtwenty-onetwenty-first21st续表twenty-twotwenty-second22ndtwenty-threetwenty-third23rdtwenty-fourtwenty-fourth24thonehundredonehundredth100thonehundredandoneonehundredandfirst101st续表注意:基数词变序数词口诀基变序,有规律,词尾常加-th;一、二、三特殊记,词尾字母t,d,d。八减t,九减e,f来把ve替。-ty结尾变-tie。若是遇上“几十几”,只变个位就可以。2.序数词的用法在使用序数词时,通常前面要加定冠词the;但是如果序数词前出现不定冠词a或an时,则表示“再一,又一”。如:We'llgooveritasecondtime.我们得再检查一遍。We'vetrieditthreetimes.Mustwetryitafourthtime?我们已经试过三遍了,还必须再试一次(第四次)吗?一、单句填空1.(2019广东)Weareproudofourcountry.Theyear2019isherseventieth(seventy)birthday.2.(2019黑龙江哈尔滨)—We'llcelebratetheseventieth(seventy)NationalDaythisyear.—That'sreallyexciting.3.(2019贵州铜仁)Therearenine(nine)floorsinthebuilding.Weliveontheninth(nine)floor.中考题组4.(2019甘肃天水)Twofifthsofthestudentsinourclassare(be)goingtothesummercampinBeijingnextweek.5.(2019甘肃兰州)Wegaveawaysixthousand(thousand)bookstotheschoollibrarylastyear.6.(2019湖北襄阳)—IsDongjinHigh-speedRailwayStationthesecond(two)largestinHubeiProvince?—Yes,ofcourse.It'sjustalittlesmallerthanthelargestoneinWuhan.7.(2019黑龙江齐齐哈尔)Wearepreparingprogramstocelebrateourcountry'sseventieth(seventy)birthday.8.(2018重庆)Thousands(thousand)ofvisitorscametotakephotosofHongyadongduringthevacation.9.(2018广东)Accordingtoasurvey,fouroutoffivewomendohouseworkathome,butonlytwofifths(five)ofmenwoulddoit.fourfifth/fourfifths/twofifth/10.(2018新疆乌鲁木齐)AnumberofpeoplepreferHUAWEIphones,andaboutfour-fifthsofthemare(be)adults.11.(2018山东青岛)It'smydaughter'sbirthdaytoday.She'seighteen(eigh-teenth)yearsold.12.(2018湖北黄冈)—Dad,aboutthreequarters(quarter)ofourclassmateswearglasses.—Oh,that'sterrible.Youallshouldtakegoodcareofyoureyes.13.(2017重庆)TodayisJack'sbirthday.Heisfourteen(fourteenth)yearsoldnow.二、语篇填空(2020河南中考预测)阅读短文,从方框中选择适当的词并用其正确形式填空,使短文意思通顺、完整。每空限填一词,每词限用一次。never,give,old,challenge,but,with,though,history,when,dropMaggie,mygranddaughter,wasmovingintoherfirstapartment.Igaveheraspe-cialgift.IwasalittleanxiousabouthowMaggiewouldreceiveit.Itwas,afterall,1andused.Shelookedatthecup.“Grandma,it'sbeautiful,”shesaid.Seeingthecracks(裂缝),sheadded,“2it'sbroken.”“No,honey,it'smended,”Isaid.ThenItoldherthecup's3.Thecupwas4tomebymydearestfriend,Dianne.Rememberweusedtohaveteapartieswhenyouwerelittle?MyfriendandIwouldshareteatimesjustlikethat.We'dgettogethertotalkoverteaaboutjoysand5lifehadpresenteduswith.Theteacupheardmanystoriesandsecrets.Womenthenwenttooneanother6theirproblems.ThereweremanymorningswhenIranuptoherhouse,andwe'dsitbythefiresideanddrinkourtea.Diannewouldlistenandofferedmecomfort7Ihadaproblem.Andshewouldcometomeinthesameway.Finally,Diannemovedaway,butIkeptmyteacupandwouldthinkofherwhenev-erIusedit.Oneday,I8myspecialcup.Ididthebesttoputittogether.Thecupwas9thesame,butIrealizeditreallydidn'tmatter.10itnolongerholdsliquid,itisfilledwithsweetmemories.“I'dlikeyoutohaveit.”“Thankyou,Grandma.”Iknewmyspecialteacupwasingoodhands—andthatitwasthespecialgiftforagranddaughterstartingoutonherownjourney.1.old2.But3.history4.given5.challenges6.with7.when8.dropped9.never10.Though一、单句填空1.(2019河南平顶山一模)—HowdoyouliketheenvironmentinPingdingshan?—Great!Twofifths(five)ofthelandis(be)coveredwithtreesandgrass.2.(2018河南信阳一模)—Goodnews!Billwonamedalinthelongjumpjustnow.—Really?That'shisfourth(four)oneatoursportsmeeting.3.(2018河南开封二模)—Whatadifficultexam!—Iagree.Itissaidthatonlyaquarterpassedthisexam.模拟题组4.(2018河南平顶山二模)—ThemathistoodifficultandIhavetriedittwice.—Don'tbeafraid.Whynottryitathird(three)time?5.—DoyouknowthegirlwhoissittingnexttoLinda?—Yes.SheisLinda'sfriend.Theyarecelebratingherninth(nine)birthday.6.(2017河南新乡一模)Tom'sfatherisforty(forty)yearsoldthisyear.Wejusthadaspecialpartyforhisfortieth(forty)birthdaylastweekend.7.(2017河南洛阳一模)Yogaisbecomingmoreandmorepopularamongyoungpeopleandmillionsof(million)ofpeopleplayitforexerciseandfun.二、语篇填空(2020河南中考原创)阅读短文,根据语篇要求填空,使短文通顺、意思完整。每空限填一词。DearVictor,Ihavereceivedyourletterfromschool.I'mgladtoknowthatyouaretakingre-sponsibility1makeadecisionaboutyourjob.Youarenowinthefinalyearofhighschooland2goingtostartfurthereduca-tionincollege.Youaskedmetogiveyousomesuggestion