1、一般情况下,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
6、不可数名词(单复数形式不变)
bread, rice, water ,juice etc.