What is the letter of a compound vowel? There are the following vowels: ie, iao, ai, ei, uo, uai, ao, ou, ia, iou, ua, uei, ü e A compound vowel refers to a compound vowel, which mainly refers to a vowel composed of two or three vowels. Chinese pinyin has thirteen disyllabic sounds.

What are the pronunciation characteristics of compound vowels? First of all, the pronunciation of vowels should be a phonetic unit with overall pronunciation. No matter the opening, lip shape or the position of the tongue, there are certain changes. This process of change is called "dynamic process". In the dynamic process of change, it is a sliding and slow change, just like a curve in mathematics, not a jumping change.

When reading compound vowels, you must read them as a whole without interruption, while triplet vowels (vowels consisting of three vowels) change through the position of the tongue. When reading the middle, you need to switch the sliding direction. Be sure to write down the three vowels of the first sound, inflection and ending, just like iao and uei.

In normal vowels, there are differences between main vowels and secondary vowels. Among them, vowels with large opening, loud pronunciation and clear pronunciation are generally called main vowels, which are generally catchy to read and rich in pronunciation, so they are also called rhyme abdomen.

Before and after the main vowel, there will be a vowel with light pronunciation, short pronunciation and overall ambiguity, so it is called "rhyme head" and "rhyme tail". According to the position of the main vowel in the vowel, it can be divided into three categories: polyphony, middle polyphony and post vowel.