韵母包含单韵母和复韵母,复韵母包含前鼻韵母和后鼻韵母。单韵母: Aa,Oo,Ee,Yi,Uu,Yuü.前鼻韵母:ANan,ENen,INin,UNun,UNün.后鼻韵母:ANGang,ENGeng,YINGing,ONGong.