(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

1. 主格一般用在句中作为主语，一般用在动词前（除疑问句）

2. 宾格多用于动词介词后面。

3. 形容词性物主代词后面必须要跟名词。

4. 名次性物主代词＝形容词性物主代词+名词

名词变复数规则