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名词和数词名词二、可数名词单数形式复数形式可数名词复数形式的变化规则:1.一般情况直接加s,读音清s,元浊z,如:bag—bags,book—books,pear—pears。2.以s、x、ch、sh等结尾的单词,加es,读音iz,如:bus—buses,peach—peaches,box—boxes。3.以元音字母+y结尾的单词直接加s,如boy—boys,以辅音字母+y结尾的单词,变y为i,再加es,读音为z如baby—babies,family—families。4.以f,fe结尾的变f/fe为v再加es,如leaf—leaves,knife—knives。5.以o结尾的单词,无生命的加s,如photo—photos,zoo—zoos,piano—pianos;有生命的加es,如potato—potatoes,tomato—tomatoes。三、名词的所有格1.单数名词直接加’s,读音清s,元浊z。如Jim’smother吉姆的妈妈,Lily’sfather莉莉的爸爸,myfirend’ssister我朋友的妹妹。2.以s结尾的复数名词,加’,读音不变。如thestudents’book学生们的书。3.不以s结尾的复数名词,加’s,读音同1中的相同。如men’sshoes男人们的鞋子,women’sskirts女人们的裙子4.of所有格:thelegsofadesk桌子的腿数词二、基数词基数词的拼写有一定的规律。1.1-12:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve。2.13-19都以teen结尾:thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen。3.20-90的基数词十位数的整数都是以ty结尾的,十位与个位之间必须用连字符号“-”:twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety。sixty-seven4.百和百以上的数词的表示方法:百位+and+十位+-个位。如364threehundredandsixty-four三、序数词1.第一-第三:first(1st),second(2nd),third(3rd)。2.第四-第十九,在相应的基数词后面直接加th:fourth(4th),fifth(5th),sixth(6th),seventh(7th),eighth(8th),ninth(9th),tenth(10th),eleventh(11th),twelfth(12th),……3.十位整数序数词的构成方法是:先将十位整数基数词尾的y变成i,然后加eth。如twentieth(20th),sixtieth(60th)4.“第几十几”的表达方法:只须将相应基数词的个位数变成序数词。如:thirty-fourth(34th),ninety-second(92nd)5.序数词的缩写:由阿拉伯数字后加上那个序数词的最后两个字母构成。如:1st,36th,73rd……当堂训练三、选择填空题。1.Thereareinthebag.A.fivemiceB.sixbookC.twoboxes2.Thereisunderthetree.A.mybikeB.abikeC.bikeD.twobikes3.Icanseethreeinthezoo.A.sheepB.dogC.Sheeps4.Idranktwo.A.orangesB.bottlesoforangeCbottleoforangeD.bottlesoforanges四、根据下列的基数词写出序数词。1.one---2.five---3.two---4.three---5.nine---6.twelve---7.thirty---8.forty---9.twenty-one—五、写出下列序数词的简写形式。1.first---2.second---3.twentieth--4.twenty-first---5.seventh----六、单选题。1.Howmanystudentsarethereinyourclass?.A.TwentynineB.thirtyandtwoC.forty-five2.Whichnumberiswrong?.A.NinetyB.NinteenC.NinthD.Nineteenth3.Whichroomdoyoulivein?.A.The201roomB.Room201C.Room201stD.The201’sRoom4.Setemberismonthofthey