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1、2)以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes, matches.? 3)以辅音字母加y结尾的名词，变y为i加es: cities, babies, enemies.?4)以f或fe结尾的名词，多数变f为v加es: wives, knives.但有些词只加s: roofs, proof s, chiefs.? 5)以o结尾的名词。

2、有些加es: Negroes, heroes, tomatoes, potatoes.其它加s: radio s, zoos, pianos, photos.? 6)不规则名词：foot→feet, goose→geese, tooth→teeth, child→children, man→me n, woman→women, sheep→sheep, deer→deer, mouse→mice. 7)某些外来词变复数：datum→data, medium→media, bacterium→bacteria, curriculum→curricula, criterion→criteria, phenomenon→phenomena. (?um/?on→a)?analysis→analyses, basis→bases, crisis→crises, diagnosis→diagnoses.(?is→es )? 8)复合名词变复数：以不可数名词结尾的复合名词无复数形式，如：homework.? 以man或woman为前缀的复合名词变复数，前后两个名词都变复数。

3、如：manservant→menservants, woman student women students.? 其它复合名词变复数：grown?up→grown?ups, brother?in?law→brothers?in?law, stand?by→stands?by.?。

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