1wife,2knife,3wolf,4thief,5shelf,6self,7life,8half,9loaf,10leaf4.辅音y结尾，去掉yiesbaby-babies，city-cities，family-families注：元音y结尾，直接s。
1. 一般名词 s
apple-apples, book-books
2. 以s,x,ch,sh结尾 es
class-classes, fox-foxes, watch-watches, dish-dishes
注：部分以o结尾 es（黑人英雄爱吃芒果土豆西红柿）
negro-negroes, hero-heroes, mango-mangoes, potato-potatoes, tomato-tomatoes
但是radio-radios, photo-photos
3. 以f或fe结尾的，去掉f或fe ves
shelf-shelves, wife-wives
常见以f或fe结尾，变复数要去掉f或fe的单词
妻子（1）拿刀（2）去宰狼（3），
小偷（4）见了心发慌，
躲在架（5）下保自（6）命（7），
半（8）条（9）树叶（10）遮目光。
1 wife, 2 knife, 3 wolf, 4 thief, 5 shelf, 6 self, 7 life, 8 half, 9 loaf, 10 leaf
4. 辅音 y结尾，去掉y ies
baby-babies，city-cities，family-families
注：元音 y结尾，直接 s。boy-boys
5. 特殊变化：
A：改a为e型
Frenchman-Frenchmen, man-men, woman-women
B：改oo为ee型
foot-feet, tooth-teeth
C：在词尾 ren
child-children
D：其他特殊变化
mouse-mice
E：单复数相同
sheep, deer, police, Chinese, Japanese
F：有些名词只用于复数形式
trousers, socks, shoes, gloves, glasses
G：“某国人”的单复数变化
中日不变，英法变，其余后面s填
Chinese和Japanese单复数相同
Englishman-Englishmen, Frenchman-Frenchmen
German-Germans, American-Americans, Australian-Australians
