Simone
下列12个以-f或-fe结尾的名词，须先将-f或烂亏-fe改成-v，再加-es。这些名词是：calf,half,knife,leaf,life,loaf,self,sheaf,shelf,thief,wife,wolf等。如禅局：wife-wives,wolf-wolves,calf-calves.以下几个名词scarf,wharf,hoof,handkerchief等的复数形式，可先将-f或-fe改成-v，再加-es；也可直接加-s即scarfs或scarves,wharfs或wharves,hoofs或hooves,handkerchiefs或handkerchieves。以f或fe结尾的名词变复贺历让数时：加s，如：belief---beliefsroof---roofssafe---safesgulf---gulfs；去f,fe加ves，如：half---halvesknife---knivesleaf---leaveswolf---wolveswife---wiveslife---livesthief---thieves；上述a和b两种方法均可，如handkerchief:handkerchiefs/handkerchieves。
