Formal:
* Mag-ayo ka? (Are you well?) - This is the most polite and formal greeting.
* Maayong adlaw. (Good day.) - This is another formal greeting, suitable for any time of day.
Informal:
* Kumusta? (How are you?) - This is a more casual greeting, suitable for friends and family.
* Aroy! (Hello!) - This is a very casual and friendly greeting, usually used between close friends.
* Uy! (Hey!) - This is a very informal greeting, used between close friends or family.
Other options:
* Hello - English is widely understood in the Philippines, so you can always use "hello" as a greeting.
* Good morning/afternoon/evening - These English greetings are also commonly used.
The best way to choose the right greeting is to consider who you are talking to and the situation.