Formal:
* 您好 (Yǐnhóu): This is the most formal and respectful way to greet someone. It literally means "you are well".
* 早晨 (Zǎochén): This is used in the morning, similar to "good morning".
* 下午好 (Xiàwǔ hǎo): This is used in the afternoon, similar to "good afternoon".
* 晚上好 (Wǎnshàng hǎo): This is used in the evening, similar to "good evening".
Informal:
* 你好 (Nǐhǎo): This is the most common and casual way to say "hi". It is less formal than "您好" but still polite.
* 喂 (Wéi): This is a very informal way to get someone's attention, similar to "hey" or "yo".
* 嗨 (Hāi): This is a more modern and casual way to say "hi", influenced by English.
You can also use greetings specific to the time of day:
* 早上好 (Zǎoshàng hǎo): Good morning
* 中午好 (Zhōngwǔ hǎo): Good noon
* 下午好 (Xiàwǔ hǎo): Good afternoon
* 晚上好 (Wǎnshàng hǎo): Good evening
It is important to note that the choice of greeting depends on the context and your relationship with the person you are greeting. For example, you would use "您好" when speaking to someone older or in a more formal setting. However, you could use "你好" or "嗨" when speaking to friends or family.
Remember, practice makes perfect! The best way to learn how to say "hi" in Cantonese is to listen to native speakers and practice saying it yourself.