一、名词名词可以分为可数名词与不可数名词,其中可数名词具有单、复数的形式;而不可数名词没有复数形式。1. 从单数 复数,变形规则如下: 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, watch-watches 3以“辅音字母+y”结尾,变y为i, 再加-es,如:family-families(家庭), strawberry-strawberries(草莓) 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(男警察)-policemen, policewoman(女警察)-policewomen, mouse-mice child(孩子)-children foot-feet,. tooth-t