[iə]：beer,deer,clear,dear,ear,fear,career,cheer,tear,gear,near,peer,sheer,engineer,volunteer
[εə]：air,pear,stare,stair,wear,bear,hair,rare,blare,dare,swear,fare,affair,chair,fair
[uə]：February,sure,tour,assure,poor,tourist,usually,ensure,boor,moor,dour,lure,mature,cure,fure,pure