2)以s、x、sh、ch結(jié)尾的名詞加es: glasses, boxes, brushes, matches.?
3)以輔音字母加y結(jié)尾的名詞,變y為i加es: cities, babies, enemies.?4)以f或fe結(jié)尾的名詞,多數(shù)變f為v加es: wives, knives.但有些詞只加s: roofs, proof s, chiefs.?
5)以o結(jié)尾的名詞,有些加es: Negroes, heroes, tomatoes, potatoes.其它加s: radio s, zoos, pianos, photos.?
6)不規(guī)則名詞：foot→feet, goose→geese, tooth→teeth, child→children, man→me n, woman→women, sheep→sheep, deer→deer, mouse→mice.
7)某些外來詞變復(fù)數(shù)：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)復(fù)合名詞變復(fù)數(shù)：以不可數(shù)名詞結(jié)尾的復(fù)合名詞無復(fù)數(shù)形式,如：homework.?
以man或woman為前綴的復(fù)合名詞變復(fù)數(shù),前后兩個名詞都變復(fù)數(shù),如：manservant→menservants, woman student women students.?
其它復(fù)合名詞變復(fù)數(shù)：grown?up→grown?ups, brother?in?law→brothers?in?law, stand?by→stands?by.?
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