1 名词单复数，如：family-families;

名词单数--复数规律:

1) 直接加s， 如： boy-boys, term-terms,

2)以o, x, s, sh, ch 结尾+es , 如: box-boxes, class-classes, glass-glasses, coach-coaches, dress-dresses, fax-faxes, inch-inches, match-matches,

3) 辅音字母加y结尾，把y改为i ，+es， 如：baby-babies, lady-ladies, factory-factories, peach-peaches, library-libraries, watch-watches ,

4) 以f或fe结尾，把f或fe，改为v+es: leaf-leaves, knife-knives, wife-wives, shelf-shelves, „

5) 特殊: man-men, policeman-policemen, woman-women, child-children, goose-geese, tooth-teeth, foot-feet,

   6) 不变: hair, milk, tea, coffee, water, bread, rice, paper, juice, meat, people, fish, sheep, „