Pronunciation hints:

1. Cantonese “aa” in “-aai” is a long vowel. Its sound is similar to “a” as in English father. However, “a” in “-ai” is a short vowel which resembles “u” as in English sun.
2. To differentiate “-aai” from “-ai”, “-aai” should be pronounced with your jaw more lowered and mouth more open than “-ai” .