No, they were pointing out that, even though English doesn’t use a separate symbol to each phonemic vowel sound, there are 20 distinct vowel phonemes. If we have each its own letter, there would be 20 vowels in English.
No, they were pointing out that, even though English doesn’t use a separate symbol to each phonemic vowel sound, there are 20 distinct vowel phonemes. If we have each its own letter, there would be 20 vowels in English.