Formal:
* 再見 (zoi gin) - This is the most common and formal way to say "goodbye". It literally means "see you again".
* 多謝 (do ze) - This means "thank you", and is often used as a polite way to say goodbye, especially if someone has helped you.
Informal:
* 拜拜 (baai baai) - This is a casual way to say "bye".
* 下次再見 (haa ci zoi gin) - This means "see you next time".
* 走啦 (zau la) - This is a very casual way to say "bye", and is often used among friends.
* 遲啲再講 (ci di zoi gong) - This means "talk to you later".
Choosing the right phrase:
* Use formal phrases like "再見" or "多謝" with elders, people you don't know well, or in professional settings.
* Use informal phrases like "拜拜" or "下次再見" with friends and family.
* "走啦" is very casual and should only be used with close friends.
It's important to remember that Cantonese pronunciation can be tricky for non-native speakers. It's best to listen to audio examples or practice with a native speaker to get the correct pronunciation.