初中英语语法复习-数词.ppt

Numbers数词,数词的考点,一.基数词、序数词,二.数词的表示法,1.基数词：表示数目的词称为基数词。,oneeleventwentytwotwelvethirtythreethirteenfortyfourfourteenfiftyfivefifteensixtysixsixteenseventysevenseventeeneightyeighteighteenninetyninenineteenten,D百位数个数基数词形式加“hundred”，表示几百，在几十几与百位间加上and101onehundredandone320threehundredandtwenty648sixhundredandforty-eightE千位数以上从数字的右端向左端数起，每三位数加一个逗号“，”。从右开始，第一个“，”前的数字后添加thousand，第二个“，”前面的数字后添加million，第三个“，”前的数字后添加billion。然后一节一节分别表示，两个逗号之间最大的数为百位数形式。,fourthousandthreehundredandtwenty-one,7,654,321,1,987,654,321,4,321,onebillionninehundredandeighty-sevenmillion,sixhundredandfifty-fourthousandthreehundredandtwenty-one,sevenmillion,sixhundredandfiftyfourthousandthreehundredandtwenty-one,热门考点：,inones+整十的复数形式(在某人几时岁时)Myparentsareintheirforties.Mr.Greenisinherfifties.表示数量的名词的使用：Severalhundredstudentsfivethousandpeople,1.hundredthousand(表示具体数字)millionbillion2.hundredsthousands(表示概数)millionsbillions,三.基数词的用法,数词(several)+,+of,manyhundredsof,月日年在2008年10月1日,四.数词的表示法年月日,onOctoberthefirst,twothousandandeight,onAugusttheninth,onOct.1st,2008,月日在8月9日月年在2010年5月,有日用on无日用in,inMay,twothousandandten,1.Theaccidenthappenedon_.A.April5,2001B.2001,April5C.April2001,52.Iwasborn_.A.inMarch8,1993B.onJuly9,1994C.onMay,1995,20世纪90年代,inthe1990s,在他50多岁时inhisfifties,四.数词的表示法年代世纪,inthe,inones+整十基数词复数在某人几十岁时,nineteen,nineties,1.Thecitychangedalot_.A.in1980sB.inthe1980sC.inthe19802.Hegottheprize_.A.inhisfiftiesB.infiftiesC.inhisfifty,序数词,first1sttwentieth20thsecond2ndtwenty-first21stthird3rdthirtieth30thfourth4thfortieth40thfifth5thfiftieth50thsixth6thsixtieth60thseventh7thseventieth70theighth8theightieth80thninth9thninetieth90th,1.序数词一般由基数词后加th构成，前面一般加定冠词the。theeighteenth,thetwohundredth2.以y结尾的基数词构成序数词时，先把y改成i，再加eth。Thefiftieth,thetwentieth3.不规则的序数词有以下几个first,second,third,fifth,eighth,ninth,twelfth,4.编号有两种表示法1）名词基数词LessonThree,PartOne2）定冠词序数词名词thethirdlesson,thefirstpart5.序数词前加a/an,表示“再”，“又”Youshouldhaveatryasecondtime.你应该再试一次。Ihaveseenthefilmtwotimes,butIwanttoseeitathirdtimebecauseitisinteresting.我已经看过这部电影两次了，但是我还想再看一次（第三次）因为太有趣了。,一个半小时两个半小时,twoandahalfhours=twohoursandahalf,oneandahalfhours=onehourandahalf,四.数词的表示法半的表示法,1.Theboyalwaysstaystherefor_.A.oneandhalfhourB.oneandahalfhourC.oneandahalfhours2.Theoldmandrank_beer.A.twobottlesandahalfB.twoandahalfbottleC.twobottleandahalf,分数，小数百分数,15,分子基数词分母序数词,onefifth,27,分子1分母+s,twosevenths,14,分子a分母quarter,aquarter,34,threequarters,12,ahalf,四.数词的表示法分数百分数,时间和钟点,oneoclock,tenpasttwo,halfpastthree,twentytofive,aquarterpastfive,aquartertoseven,sevenfifty,表示在几点钟用介词at,四.数词的表示法时间,一倍once，两倍twice，三倍threetimes(三倍或以上：基数词times),四.数词的表示法倍数,Thisboxisfivetimesasbigasthatone.=Thisboxisfourtimesbiggerthanthatone.,A+be+倍数+as+adj.原+as+B.A是B的倍C+be+倍数+adj.比+than+D.C比D大倍,sixtimesheavierthan,seventimesasheavyas,1.Thisbuildingis_thatbuilding.A.threetimeastallasB.twicetallerthanC.threetimesastalleras2.我的箱子比你的重六倍!Myboxis_yours.,Thewinneris_.Heisan_boy.A.eight-year-old;eightyearsoldB.eightyearsold;eight-year-oldC.eight-yearsold;eight-year-oldHecametoChina_.A.att