1、中考专题复习中考专题复习数词数词基数词基数词、序数词序数词及分数分数1.构成构成2.基本用法基本用法基数词基数词一、基数词的构成一、基数词的构成范围范围特点特点举例举例1-12特殊记four,five,eleven,twelve13-19以teen结尾thirteen,fourteen20-90整十数以ty结尾twenty,thirty21-99两位数十位与个位用-隔开twenty-one,eighty-three101-999百位后有and连接six hundred and fourty-two1000以上每三位用，隔开three thousand,four hundred and two1
2、-12:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve我来变一变个位数twothreefourfivesixseveneightnine十几twelvethirteenfourteenfifteensixteenseventeeneighteennineteen整十数twentythirtyfortyfiftysixtyseventyeightyninety二、基数词的用法二、基数词的用法1.表示年、年代和具体时刻。I get up at six every morning.she was born in 2005.
3、20世纪90年代：1990s/the 1990s2.表示电话号码或编号My telephone number is 2233157.He lives in Room 801.3.用于四则运算Two plus three is five.Five times six is thirty.4.表示倍数Their house is three times as big as ours.5.表示小数和百分数 5.6 five point six 20%twenty percent 6.表示顺序时，位于名词后，且首表示顺序时，位于名词后，且首字母通常要大写字母通常要大写。Please turn to P
4、age Six.当hundred,thousand,million等前面有具体的数字，表示准确的数目时，不用复数形式，也不能与of连用；但若表示数百、数千、数百万这样的概数时，则需要用复数形式，且与介词of连用。温馨提示温馨提示1.构成构成2.基本用法基本用法序数词序数词一、序数词的构成一、序数词的构成范围范围特点特点举例举例1-3特殊记first,second,third4-19基数词后加thfourth,sixth20-90整十数变ty为tie再加thtwentieth21-99两位数十位基数词，个位序数词twenty-firsthundred,thousand,million基数词后加t
5、hhundredth,billionth记忆口诀记忆口诀基变序，有规律，词尾加上th一二三，特殊记，结尾分别t,d,d八去t，九去e，f要把ve替整十基数变序数，先要变y为ie，th最后加上去若要变成几十几，只变个位就可以。二、序数词的用法二、序数词的用法1.表示顺序，位于名词前the fifth lessonthe first time2.表示世纪或日期in the sixth century ADJanuary 12th1.构成构成2.基本用法基本用法分数分数一、分数的构成读分数时，先读分子，后读分母03分子大于1时，分母用复数形式02分子用基数词，分母用序数词01二、分数的用法二、分数的
6、用法Nearly three-fourths of the surface is covered by water.“分数分数+of+可数名词单数可数名词单数/不可数名词不可数名词”作主语时，谓语动词用单数作主语时，谓语动词用单数Two-thirds of the students are boys in Class 2.“分数分数+of+可数名词复数可数名词复数/人称代词宾格复数人称代词宾格复数”作主语时，谓语动词用复数作主语时，谓语动词用复数0102练习闯关练习闯关()1Thereare_daysinayearAthreehundredandsixtyfiveBthreehundredan
7、dsixty-fiveCthreehundredsandsixtyfiveDthreehundredsandsixtyfive()2Dannylivesin_Aroom404BRoom404C404roomD404Room()3Jimisin_Aclassone，gradesixBgradeone，classsixCClassOne，GradeSixDGradeOne,ClassSixBBC练习闯关练习闯关()1Marchthe_isWomensDay.A.eighthB.ninthC.tenthD.eight()2Septemberisthe_monthoftheyear.A.ninethB.ninthC.nineD.thetwelveth()3Decemberthe_isChristmas.A.twenty-fiveB.twenty-fifthC.twentieth-fiveD.twenty-five()4Thebikecostme_yuanAfivehundredfortyBfivehundredsfourtyCfivehundredandfortyDfivehundredfourtyABBC谢谢观看
