1)以y结尾的专有名词,或元音字母+y 结尾的名词变复数时,直接加s变复数:
如: two Marys the Henrys
monkey---monkeys holiday---holidays
比较: 层楼:storey ---storeys story---stories
2)以o 结尾的名词,变复数时:
a.加s,如: photo---photos piano---pianos
radio---radios zoo---zoos;
b.加es,如:potato--potatoes tomato--tomatoes
c.均可,如:zero---zeros / zeroes
3)以f或fe 结尾的名词变复数时:
a.加s,如: belief---beliefs roof(屋顶)---roofs
safe---safes gulf(海湾,分歧)---gulfs;
b.去f,fe 加ves,如:half---halves
knife(刀)---knives leaf(叶)---leaves wolf(狼)---wolves
wife(妻子)---wives life---lives thief(小偷)---thieves;
c.均可,如: handkerchief:
handkerchiefs / handkerchieves
From:https://www.zgghmh.com/CET-4/20000389.asp