1.一般情况,直接加-s,
如:book-books, bag-bags, cat-cats, bed-beds
2.以s. x. sh. ch结尾,加-es,
如:bus-buses, box-boxes, brush-brushes, watch-watches
3.以“辅音字母+y”结尾,变y为i, 再加-es,如:
family-families, strawberry-strawberries
4.以“f或fe”结尾,变f或fe为v, 再加-es,
如:knife-knives
5.不规则名词复数:
man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice
child-children, foot-feet, tooth-teeth, fish-fish, people-people, Chinese-Chinese, Japanese-Japanese
不可数名词的复数就是原型:
paper, juice, water, milk, rice, tea