第1个回答 2015-01-17
．一般名词复数是在名词后面加上“s”，如map→maps， bag→bags等； 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，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，如：manservant→menservants, woman student women students. 其它复合名词变复数：grownup→grownups, brotherinlaw→brothersinlaw, standby→standsby. 还有一点以f、fe结尾的单词，回f、fe为v，再加es