初中英语数词讲解及专项练习

数词一．数词含义：数词分为基数词和序数词。表示数目和数量的词为基数词；表示数目顺序的词为序数词。二．基数词基数词1-100(略)ten/onehundred/onethousand/tenthousand/onehundredthousandonemillion/tenmillion/onehundredmillion/onebillion123onehundrendandtwenty-three1,234onethusand,twohundredandthirty-four.12,345twelvethousand,threehundredandforty-five(千位与百位之间用逗号连接,百位与十位之间用and连接,十位与个位之间用连字符-连接)threehundred(hundred没有复数,不能加s；hundred前面只能用数字,不能用many和afew)hundredsof(hundred如果加s,后面必须接of)fivethousand(thousand没有复数,不能加s；thousand前面只能用数字,不能用many和afew)thousandsof(thousand如果加s,后面必须接of)三．讲解序数词序数词firstsecondthirdfourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenthtwenty-firsttwenty-secondtwentieththirtiethfortiethfiftiethsixtiethseventietheightiethninetiethonehundredth四．数词的表示法LessonThree:第三课pagefoursixthree:第463页pagefiveoseven:第507页Roomthreeofive:第305房间：Seventy-sixChang’anStree:长安街76号inhisfifties:在他50多岁的时候Januarytwenty-eighthFebruaryfourteenthOctoberfirst年代:1978:nineteenseventy-eight2008:twothousandandeight2010:twothousandandten1900:nineteenhundred1908:nineteenandeight/nineteenhundredandeight1960s（1960’s）:二十世纪六十年代(inthe1960s/inthe1960’s)钟点:8：45eightforty-five/aquartertonine9：15ninefifteen/aquarterpastnine10：03tenthree/threepastten11：30eleventhirty/halfpasteleven小数的读法：1.25:onepointtwofive3.728:threepointseventwoeight0.56:(zero)pointfivesix/(naught)pointfivesix百分数的读法：5％:fivepercent；20％：twentypercent；100％:onehundredpercent0.5％:zeropointfivepercent(naughtpointfivepercent)分数表示法:分子用基数词,分母用序数词.分子大于1时,分母用复数形式.1/5:onefifth；2/5:twofifths；1/4:aquarter/onefourth3/4:threequarters/threefourths；51/2:fiveandahalf；72/5:sevenandtwofifths在数学课上，可以这样读分数：1/2：oneovertwo2/3:twooverthree3/4:threeoverfour11/20:elevenovertwenty数词专项训练1．Hebecameafamouswriterinhis.A.thirtyB.thirtiethC.thirtiesD.thirty’s2．--Howoftendoyougotothemovies?--amonth.A.twoB.secondC.thesecondD.twice3．Myofficeisonfloor.A.twelveB.twelfthC.twelvethD.thetwelfth4．Therearemorethanthreepeopleinthepark.A.hundredB.hundredsC.hundredsofD.hundredof5．Theweightofthemoonisonlyaboutoneoftheearth.A.eightB.eighthC.eightyD.theeighth6．MrBrown’sroomisonthethirdfloor.A.Room309B.309RoomC.theRoom309D.the309Room7．Chinaislargestcountryintheworld.A.theB.threeC.thirdD.thethird8．Thereareworkersinthisfactory.A.fivethousandandtwohundredandsixty-fiveB.fivethousandandtwohundredandsixtyfiveC.fivethousand,twohundredandsixty-fiveD.fivethousands,twohundredandsixty-five9．Tomisaboy.A.12yearoldB.12yearsoldC.12-years-oldD.12-year-old10．Aboutofthestudentsinmyclassaregirls.A.threefifthB.threefifthsC.thirdfiveD.thirdfives11．Thereisnotenoughroomforus.A.fourB.thefourC.fourthD.thefourth12．Tenyearsalongtime.A.wereB.isC.areD.be13．Iwasexhaustedafterwalk.A.sixhoursB.sixhour’sC.sixhours’D.sixhour14．CocaColastartedtoenterChina’smarket.A.in1970’sB.in1970sC.inthe1970s’D.inthe1970s15．Myapartmentisonfloorofthisbuilding.A.thirtyB.thirtythC.thethirtythD.thethirtiethCDDABADCDBABCDD