可数名词都有单数和复数两种形式,复数形式通常是在单数形式后加-s或-es构成.加的主要方式有：例词一般在词尾直接加-sbook-booksgirl-girls以e结尾的词,直接加-scake-cakeshouse-houses以s,x,ch,sh结尾的词,在词尾加-esclass-classesbox-boxesmatch-matchesbrush-brushes以“辅音字母+y”结尾的词,变y为i,再加-escity-citiescountry-countries
⑴以f或fe结尾的词,多数变f或fe为v,再加-es：wife-wiveslife-livesknife-kniveshalf-halves⑵有少数名词的复数形式与单数形式差别较大：man-menwoman-womenchild-childrenfoot-feet⑶有个别名词的单复数形式是一样的：sheep,deer,Chinese,Japanese等1.一般来说,物质名词和抽象名词是不可数的,因此没有复数形式.如：news,milk,water,information,furniture等2.不可数名词前可以用some或any修饰somemilk,somenews3.如果要表示量的概念,就需要加定语：apieceofbreadthreepiecesofbreadaglassofwatertwoglassesofwaterabottleofmilkfivebottlesofmilk