1、一般情况下,直接加-s。
例如:book-books, bag-bags, cat-cats, bed-beds 等等。
2、以s、 x、 sh、 ch结尾,加-es。例如:bus-buses, box-boxes, brush-brushes, watch-watches等等。
3、以“辅音字母+y”结尾,变y为。例如:family-families, strawberry-strawberries等等。
4、以“f或fe”结尾,变f或fe为v。例如:knife-knives5.不规则名词复数。例如:man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice child-children foot-feet,、tooth-teeth fish-fish, people-people, Chinese-Chinese, Japanese-Japanese等等。
6、不可数名词(单复数形式不变)。例如:bread, rice, water ,juice etc.