Pinyin Lessons Study Material GoodChinese
[ao] is compound final. The former vowel is more open, longer and louder while the latter one is narrow, short, weak and blurred. It is imperative to havea natural glide but not a sudden change from the former to the latter.
[ou] is compound final. The former vowel is more open, longer and louder while the latter one is narrow, short, weak and blurred. It is imperative to havea natural glide but not a sudden change from the former to the latter.
[iu] is compound final. The former vowel is more open, longer and louder while the latter one is narrow, short, weak and blurred. It is imperative to havea natural glide but not a sudden change from the former to the latter.