)单数名词加s: students, apples, bags, trees, books, brothers.?
2)以s、x、sh、ch结尾的名词加es: glass, 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，有些加es:Negroes,heroes,tomatoes,potatoes.其它加s:radios,zoos,pianos, photos.?
6)不规则名词：foot→feet,goo→gee,tooth→teeth,child→children,man→men,woman→women, sheep→sheep, deer→deer, mou→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→analys, basis→bas, crisis→cris, diagnosis→diagnos.(?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，如：manrvant→menrvants, woman student women students.?
