可数名词单复数一、变化规则:1一般情况下,直接加-s,如:book-books, bag-bags, cat-cats, bed-beds2以s. x. sh. ch结尾,加-es,如:bus-buses, box-boxes, watch-watches3以“辅音字母+y”结尾,变y为i, 再加-es,如:family-families(家庭),以元音+y结尾的直接加s,例如monkey-monkeys.4以“f或fe”结尾,变f或fe为v, 再加-es,如:knife-knives5不规则名词复数man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice, child-children, foot-feet, tooth-teeth, 6.单复数同形:fish-fish, sheep-sheep people-people, Chinese-Chinese, Japanese-Japanese7.和woman/man搭配的词组要双重复数。例如w