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1、I.名词复数规则变化–11.规则变化是在单数名词后加s如﹕cat–cats,fruit–fruits,apple–apples,pear–pears2.以子音字母加y结尾的，改y为i,再加es,但当y前面是元音时，y不变，直接加s,如﹕fly–flies,monkey–monkeys.名词复数规则变化–21.以子音字母加o结尾的，一般加es,如﹕hero–heroes,tomato–tomatoes,potato–potatoes2.元音字母加o结尾的，只加s,如﹕bamboo–bamboos,kangaroo-kangaroos.3.某些外来语和简略语只加s，如,piano
2、–pianos,photo–photos,名词复数规则变化–31.一般以f或fe结尾的，变f或fe为ves,如﹕leaf–leaves,knife–knives,wife–wives,life–lives2.以s,ss,x,z,sh,ch结尾的，加es（但也有直接加s的），例如﹕glass–glasses,buzz–buzzes,dish–dishes,bench–benches,bus–buses,stomach–stomachs,box–boxes变化类型构成形式ExampleI1.直接在名词后加scat–cats,fruit–fruits,apple–apples,pe
3、ar–pears2.以子音字母加y结尾的，改y为i,再加es,但当y前面是元音时，y不变，直接加s,fly–flies,monkey–monkeys.II1.以子音字母加o结尾的，一般加es,hero–heroes,tomato–tomatoes,potato–potatoes2.元音字母加o结尾的，只加sbamboo–bamboos,kangaroo-kangaroos3.某些外来语和简略语只加spiano–pianos,photo–photos,III1.以f或fe结尾的，变f或fe为vesleaf–leaves,knife–knives,wife–wives,life–
4、lives2.以s,ss,x,z,sh,ch结尾的，加S（但也有直接加s的）glass–glasses,buzz–buzzes,dish–dishes,bench–benches,bus–buses,stomach–stomachs,box–boxes2II.名词复数的不规则变化1.改变内变元音字母﹕foot–feet,tooth–teeth,man–men,woman–women,mouse–mice.2.加字尾en或ren，ox–oxen,child–children3.单复数同形﹕sheep–sheep,deer–deer,4.有些外来语保留原来的复数形式﹕bacter
5、ium–bacteria,phenomenon–phenomena构成形式Example改变内部元音字母foot–feet,tooth–teeth,man–men,woman–women,mouse–mice.加字尾en或renox–oxen,child–children单复数同形sheep–sheep,deer–deer,fish,fish有些外来语保留原来的复数形式bacterium–bacteria,(细菌)phenomenon–phenomena（现象）变化类型构成形式ExampleI1.直接在名词后加s2.以子音字母加y结尾的，改y为i,再加es,但当y前面是元音时
6、，y不变，直接加s,cat–cats,fruit–fruits,apple–apples,pear–pearsfly–flies,monkey–monkeys.II1.以子音字母加o结尾的，一般加es,2.元音字母加o结尾的，只加s3.某些外来语和简略语只加sox–oxen,child–childrenbamboo–bamboos,kangaroo-kangaroos.piano–pianos,photo–photos,III1.以f或fe结尾的，变f或fe为ves2.以s,ss,x,z,sh,ch结尾的，加S（但也有直接加s的）leaf–leaves,knife–knive
7、s,wife–wives,life–livesglass–glasses,buzz–buzzes,dish–dishes,bench–benches,bus–buses,stomach–stomachs,box–boxes构成形式Example改变内变元音字母foot–feet,tooth–teeth,man–men,woman–women,mouse–mice.加字尾en或renox–oxen,child–children单复数同形sheep–sheep,deer–deer,有些外来语保留原来的复数形
