3. the main vowel:
Cantonese has 9 main vowels. They are:
1. The letter "aa" corresponds to the international phonetic alphabet [a];
2. The letter "a" corresponds to the international phonetic alphabet [ɐ];
3. The letter "i" corresponds to the international phonetic alphabet [i]; but when preceded by "ng" or "k", the corresponding international phonetic alphabet is [ɪ];
4. The letter "u" corresponds to the international phonetic alphabet [u]; but when preceded by "ng" or "k", the corresponding international phonetic alphabet is [ʊ];
5. The letter "e" corresponds to the international phonetic alphabet [ɛ]; but when preceded by "i", the corresponding international phonetic alphabet is [e];
6. The letter "o" corresponds to the international phonetic alphabet [ɔ]; but when preceded by "u", the corresponding international phonetic alphabet is [o];
7. The letter "v" corresponds to the international phonetic alphabet [y];
8. The letter "oe" corresponds to the international phonetic alphabet [œ];
9. The letter "eo" corresponds to the international phonetic alphabet [ɵ].
It should be noted that in Cantonese syllables, finals are not necessarily required.
Therefore, Cantonese has 9 finals plus the case without the main vowel, totaling 10 variations.