Formal:
* 坐低 (zo6 dai1): This is the most common and formal way to say "sit down." It literally means "sit low."
* 坐 (zo6): This is a shorter and less formal way to say "sit down."
* 請坐 (cing2 zo6): This means "please sit" and is used when inviting someone to sit down.
Informal:
* 坐低啦 (zo6 dai1 laa): This is a more informal way to say "sit down" and is often used with friends or family.
* 企埋一邊 (kei2 maai4 jat1 bin1): This literally means "stand aside" and is used to tell someone to move away so that they can sit down.
Note: The tones are indicated using numbers (e.g., zo6). Cantonese tones are important for understanding the meaning of words.
You can choose the most appropriate phrase based on the situation.