一、可数名词变双数规那么1
普通状况下加s例:friend→friends;cat→cats;style→styles;sport→sports;piece→pieces2
以s、z、x、ch、sh开头加es例:bus→buses;quiz→quizzes;fox→foxes;match→matches;flash→flashes3、以子音字母+y开头,将y改动为i,再加-es例:candy→candies;lady→ladies;story→stories4、以-o开头的名词,假如不是外来词或缩写,就加-es,否那么加-s形成双数
(有性命的加es,无性命的加s)例:tomato→tomatoes;potato→potatoes;torpedo(鱼雷)→torpedoes;bingo→(彩票式游戏)bingoes反例:radio→radios;piano→pianos(外来词);photo→photos;zoo→zoos5、以f或fe开头的将f或fe变为-ves,但有破例例:knife→knives;lifescarf→(领巾)scarves→lives;leaf→leaves;员工)staff(→staves;直截了当加s:roof-roofs,belief-beliefs,gulf(海湾)-gulfs,serf(农奴)-serfs,safe-safes,chief(担任人)-chiefs6、不规那么名词:例:man→men;woman→women;child→children;personfoot→feet;goose→geese;mouse→mice;tooth→people;ox→;oxen→teeth;datum→数据dataanalysis→analyses剖析;basis→bases根底;datum→data数据;formula→公式formulae/for