可数名词变不可数名词的规则

以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes,
matches.?

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.?

以o结尾的名词,有些加es: Negroes, heroes, tomatoes, potatoes.其它加s: radio s,
zoos, pianos, photos.?

不规则名词：foot→feet, goose→geese, tooth→teeth,
child→children, man→me n, woman→women, sheep→sheep, deer→deer, mouse→mice.

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
)?

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,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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