摘要: 单数名词变为复数的形式 规律: 1)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: 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: radios, zoos, pianos, photos. 6)不规则名词:foot→feet, goose→geese, tooth→teeth, child→children, man→men, 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. analysis→analyses, basis→bases, crisis→crises, diagnosis→diagnoses. 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:grown up→grown ups, brother in law→brothers in law, stand by→stands by. 9)复合形容词做定语时.其中的名词保持单数:a six year old boy.a two hundred page book

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