Formal:
* Habari za asubuhi? (Good morning, how are you?) - Used in the morning.
* Habari za mchana? (Good afternoon, how are you?) - Used in the afternoon.
* Habari za jioni? (Good evening, how are you?) - Used in the evening.
* Habari gani? (How are you?) - More general greeting, can be used at any time of day.
Informal:
* Shikamoo! (Hello, how are you?) - This is a very common greeting, especially among younger people.
* Umekuwaje? (How have you been?) - This is a more informal way of asking how someone is doing.
Responses:
* Nzuri, asante. Wewe? (Good, thank you. And you?)
* Sijambo, asante. Na wewe? (I'm fine, thank you. And you?)
* Poa, asante. Na wewe? (Good, thank you. And you?)
Note: You can also use a combination of these phrases, such as "Habari za asubuhi! Umekuwaje?" (Good morning! How have you been?)