1.一般名词复数是在名词后面加上“s”,如map→maps, bag→bags等;2.以s, sh, ch, x等结尾的词加“es”,如bus→buses, watch→watches等;3.以辅音字母+y结尾的词,变y为i加es,如baby→babies等;以元音字母+ y结尾的名词变复数时,直接加s变复数,如monkey→monkeys, holiday→holidays, storey→storeys(楼层);4.以o 结尾的名词变复数时:a)加s的名词有:photo→photos ,piano→pianos, radio→radios, zoo→zoosb)加es的名词有:potato→potatoes tomato→tomatoes5.以f或fe结尾的名词变复数时:a)加s的名词有:belief→beliefs roof→roofssafe→safes gulf→gulfsb)去掉f, fe 加ves的名词有:half→halves knife→knivesleaf→leaves wolf→wolveswife→wives life→lives thief→thieves