二、韵母系统的学习难点 普通话有三十九个韵母。通常分为单韵母、复韵母和鼻韵母三类: 单韵母:a、o、e、ê、i、u、ǖ、-i(前)、-i(后)、er。 复韵母:ai、ei、ao、ou、ia、ie、iao、icu、ua、uo、uai、uei、ǖe 鼻韵母:an、en、ang、eng、ong、ian、in、iang、ing、iong、uan、uen、uang、ueng、uan、un。 贵阳话有三十六个韵母: 单韵母:a、o、ê、i、u、ǖ、-i(前)、er。 Second, vowel system difficult to learn Putonghua thirty-nine vowels. Usually divided into single vowels, complex vowels and nasal vowels three categories: single finals: a, o, e, e, i, u, ǖ, -i (front), - i (after), er. Complex vowels: ai, ei, ao, ou, ia, ie, iao, icu, ua, uo, uai, uei, ǖe nasal vowels: an, en, ang, eng, ong, ian, in, iang, ing, iong , Uan, uen, uang, ueng, uan, un. Guiyang dialect has thirty-six vowels: single finals: a, o, ê, i, u, ǖ, -i (front), er.