以“f”结尾的单词直接加“s”变复数的s所有单词答:roofs, proof s, chiefs.2)以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes, matches.3)以辅音字母加y结尾的名词,变y为i加es: cities, babies, enemies.4)以f或fe结尾的名词,多数变f为v加es: wives, knives.但有些词只加s: roofs, proof s, chiefs....
keies是keie的复数吗?答:[注]:少数以o结尾的词,变复数时只加s。如:photo→photos, piano→pianos.③以辅音字母加y结尾的名词,变y为i,再加es。如:family→families, city→cities, party→parties.④以f或fe结尾的名词,变f或fe为v,再加es。如:shelf→shelves, wolf→wolves, life→lives, knife→knives.2、不规则...