一般情况（包括以e结尾的名词）加-s-s在清辅音[p][t][k][f]后读[s]在浊辅音和元音后读[z]在辅音[s][z][d]后读[iz]口诀：清清浊浊元浊Cups,cats,cakes,roofs,flags,keys,faces以s,x,ch,sh结尾加-es在[s][z][?][t?]后读[iz]Classes,boxes,watches,brushes以辅音+y结尾变y为i,加es读[z]Cities,countries,studies以元音+y结尾加-s读[z]Boys,rays,days有人还把以下两个加入了名词有规则变复数的行列.情况构成法读音例词以o结尾加-es读[z]Heroes,tomatoes,potatoes,Negroes加-s读[z]Bamboos,radios,zoos,photos,pianos以f,fe结尾变f,fe为v,再加-es读[vz]Leaf-leavesLife-livesWife-wives加-s读[s]Roofs,proofs,chiefs40