(1)多数名词及缩略词,词尾加"s",清辅音后读[s];浊辅音后读[z](2)以s,x,z,ch,sh结尾,词尾加"es",es读[z](3)以辅音字母+y结尾,变y为i,再加es,es读[z](4)以f或fe结尾,把f或fe变为v,再加es,es读[z](5)以f或fe结尾,有些直...