The vowels are usually separated into two groups: monophthongs and diphthongs. Monophthongs are generated with a single articulatory movement (that's why the prefix mono), when diphthongs aspect an articulatory alter. Diphthongs have two constituents: a glide (or even a semivowel) and also a monophthong. You can find some disagreement about https://francisco2e6je.targetblogs.com/28540418/little-known-facts-about-korean