2016年人教版九年级英语专题复习之数词

数词---就是表示事物的数量和顺序的词,分为基数词和序数词两种。数词基数词序数词表示事物的数量表示事物的顺序(1)1-12分别由从one到twelve12个各不相同的词表示。0zero1one2two3three4four5five6six7seven8eight9nine10ten11eleven12twelve基数词构成方法如下：13thirteen14fourteen15fifteen16sixteen17seventeen18eighteen19nineteen(2)13-19均以后缀-teen结尾。20twenty30thirty40forty50fifty60sixty70seventy80eighty90ninety(3)20-90的整十数词均以后缀-ty结尾。表示“几十几”时,个位和十位之间需加连词符,如:twenty-one,thirty-two,forty-three.百位和十位(若无十位则和个位)之间用and连接,十位和个位间用“-”连接。156onehundredandfifty-six;810eighthundredandten204twohundredandfour;(4)三位数数词:基数词+hundredthousandmillion表示具体数字表示具体、准确的数目时,hundred,thousand,million等词后不能加-s,如:fivehundred,sixthousand,sevenmillion等。hundredsthousandsmillions+of表示概数当hundred,thousand等数词与of连用,表示不具体、不准确的数目时,词尾须加-s。如:thousandsofstudents,millionsoftrees.afew后常接hundred;many后常接hundredsof;several后常接hundred或hundredsof。afewhundredmen几百人manyhundredsofmen几百人1.—Ifa=3,b=4,what’stheanswertotheproblem,a+2ab+1=?—Theansweris___.A.twentyeightB.twenty-eighthC.twenty-eight2.Inourschoolseveral__studentsareabletosearchtheInternet.A.hundredofB.hundredsofC.hundredsCB3.Many___sheepwerekilledintheaccident.A.thousandsofB.thousandC.thousands4.Thereareovernine___workersinthefactory,but___ofyoungpeoplehopetoworkinit.A.hundred;hundredsB.hundreds;hundredsC.hundreds;hundredAA序数词1=one1st=first2=two2nd=second3=three3rd=third4=four4th=fourth5=five5th=fifth6=six6th=sixth7=seven7th=seventh8=eight8th=eighth9=nine9th=ninth10=ten10th=tenth11=eleven11th=eleventh12=twelve12th=twelfth13=thirteen13th=thirteenth14=fourteen14th=fourteenth15=fifteen15th=fifteenth16=sixteen16th=sixteenth17=seventeen17th=seventeenth18=eighteen18th=eighteenth19=nineteen19th=nineteenth20=twenty20th=twentieth21=twenty-one21st=twenty-first22=twenty-two22nd=twenty-second序数词(1).序数词除了first(第一)、second(第二)、third(第三)特殊外,其余的都是在基数词上加词尾-th构成。注意fifth,eighth,ninth,twelfth这几个词。基数词onetwothree序数词firstsecondthird基数词fiveeightninetwelve序数词fiftheighthninthtwelfth(2)从第二十至第九十以-ty结尾的表示“几十”的基数词(十位整数的序数词),先变y为ie,再加“-th”构成。twentytwentieth;thirtythirtiethfortyfiftysixtyseventyeightyninety(3)表示“第几十几”时，十位数的“几十”仍用基数词，只把处位部分变成序数词。thirty-onethirty-first第31forty-twoforty-second;fifty-sixth;seventy-third;ninety-ninth(5)序数词的缩写形式有时,序数词可以用缩写形式来表示。序数词的缩写形式,由阿拉伯数字加序数词的最后两个字母构成。主要缩写形式有。first—1st;second—2nd;third—3rd;fourth—4th;sixth—6th;twentieth—20th;twenty-third—23rd其中1st,2nd,3rd为特殊形式,其它的都是阿拉伯数字后加上th。注:序数词前通常要加定冠词the。如果名词前有代词（my/her/this/that）则不加the.We’llgooveritasecondtime.We’vetrieditthreetimes.Mustwetryitafourthtime?TheSecondWorldWarbrokeoutin1939.注:序数词前出现不定冠词a或an时,则表示“再—”,“又—”。(=another)Twodaysisn’tenoughformetofinishthework.Ineed____day.(2008宁波市鄞yin州)A.athirdB.thethirdC.theotherD.otherAInordertomakeitclear,Imustgoupto_______secondfloorandaskhim_______secondtime.(2005呼和浩特市)A.the;aB.the;theC.a;theD.a;aA分数的表示法:分子用基数词,分母用序数词。分子大于1时,分母用复数(+s)。基数词序数词数词的表示法—分数15分子基数词分母序数词onefifth27分子﹥1分母+stwosevenths14分子a分母quarterafourth/onefourth/aquarter/onequarter34threefourthsthreequarters12asecond/ahalfAbout_______oftheworkersinthefactorywereborninthe_______.(2008无锡市;2009兰州市)A.two-thirds;1970B.two-thirds;1970sC.two-third;1970D.two-third;1970sB二、时刻表示法时刻通常用基数词来读顺序法:先说时钟数,后说分钟数。8:45(=eightforty-five)10:05(=tenfive)6:30=sixthirty10:25=tentwenty-five14:05=fourteenofive16:15=sixteenfifteen18:30=eighteenthirty23:55=twenty-threefifty-five注意:表示“整点”时,在基数词后加o’clock:9o’clock几点过几分:分钟数≤30分钟时,用“分钟数+past+时钟数”；6:05fivepastsix8:15aquarterpasteight9:25twenty-fivepastnine7:30halfpastseven反序法:先说分钟数,后说时钟数。6:20/7:25/10:15/9:10几点差几分:分钟数﹥30时,用“到下一个时钟所差的分钟数+to+下一个时钟数”。7:35twenty-fivetoeight11:40twentytotwelve8:50tentonine6:559:434:51—It’salready7:40now.Whenwillthefilmstart?—___.Westillhavefiveminutes.A.AquartertosevenB.Sevenpastforty-fiveC.AquartertoeightC三、年代用“the+基数词表示的世纪+十位整数的复数形式表示的年代”构成。在二十世纪三十年代inthe1930s(inthenineteenthirties)在十九世纪六十年代inthe1860s(intheeighteensixties)C.thetwenty-first,thetwentieth2.Thecitychangedalot___.A.in1980sB.inthe1980sC.inthe1980B“inone’s+整十位基数词的复数”是一种习惯表达法,用以表示约略年龄,意为“在某人几十几岁的时候”。使用该结构时,必须注意①数词用复数形式,②其前是形容词性物主代词,③最前面是介词in。inone’sforties在某人四十多岁时Mymotherisinherfifties.WhenMrLiuwas____,hebecameafamousprofessor.A.onhisfortiesB.inthefortiesC.inthefortyD.inhisfortiesMyfatherbegantolearnRussianwhenhewasoverfifty.MyfatherbegantolearnRussian_______________.inhisfiftiesD一个半小时twoandahalfhours=twohoursandahalfoneandahalfhours=anhourandahalf数词的表示法——“……半”的表示法两个半小时一年半两年半twoandahalfyears=twoyearsandahalfoneandahalfyears=ayearandahalf1.Theboyalwaysstaystherefor_____.A.oneandhalfhourB.oneandahalfhourC.oneandahalfhours2.Theoldmandrank_____beer.A.twobottlesandahalfB.twoandahalfbottleC.twobottleandahalfCA数词的表示法——“一两个”的表示法“a/an+单名+ortwo”或“oneortwo+复名”。Don’tworry.You’llbeallrightinadayortwo.Icanonlystayhereforoneortwodays.Icanfinishtheworkinaweekortwo.“一两个”习惯上用注意:a/an和one不可调换。三、年月表示法theseventeenthcentury十七世纪the1600s十七世纪thetwentiethcentury二十世纪the1900s二十世纪the1950s二十世纪五十年代1.世纪可以用“the+序数词+century”表示,也可以用“the+百位进数加s”表示1.Therewillbemorechancesin__centurythanin__century.A.twenty-one,twentyB.twenty-first,twentiethC.thetwenty-first,thetwentiethC3.Hegrad