英语单词单数变复数规则
单词单数变复数规则 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: 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.
crisis →crises, (um/on →a) analysis →analyses,
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: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 basis →bases,