精选优质文档-倾情为你奉上名词单复数变化规则:1一般情况下，直接加-s，如：book-books, bag-bags, cat-cats, bed-beds,boy-boys,pen-pens.2以s,x,sh,ch结尾，加-es，如：box-boxes, bus-buses, 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,baby-babies, lady-ladies, factory-factories,library-libraries, 4以“f或fe”结尾，变f或fe为v, 再加-es，如：knife-knives, leaf-leaves, wife-wives, 5O结为分两类： 有生命的,加-es,如potato-potatoes,tomato-tomatoes.没有生命的,加-s, 如photo-photos不规则名词复数：man-men, woman
