名词复数规则

　　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