名词单数变复数变化规则:1一般名词复数是在名词后面加上“s”,如mapmaps, bagbags,book-books等; 2以s,x, sh, ch结尾的词加“es”,如busbuses, watchwatches, box-boxes等; 3以f或fe结尾的名词变复数时,去掉f, fe 加ves的名词有: halfhalves knifeknives leafleaves wolfwolves wifewives lifelives thiefthieves4以o 结尾的名词变复数时: a)加s的名词有(无生命):photophotos ,pianopianos, radioradiosb)加es的名词有(有生命): potatopotatoes tomatotomatoes 5以辅音字母y结尾的词,变y为i加es,如babybabies, family-families, study-studies等;以元音字母 y结尾的名词变复数时,直接加s变复数,如monkeymonkeys, ho