What is the Tagalog of why should you?

There are several ways to translate "Why should you?" in Tagalog, depending on the context and tone:

Formal:

* Bakit ka dapat? (Most literal translation)

* Bakit kailangang ikaw? (Emphasis on "you")

* Ano ang dahilan kung bakit dapat kang...? (More formal and emphasizes reason)

Informal:

* Bakit mo naman gagawin 'yan? (Implies questioning the necessity)

* Bakit ikaw pa? (Informal and slightly sarcastic)

* Bakit ka naman magsisikap? (Implies questioning effort)

Other options:

* Ano ang motibo mo? (What is your motive?)

* May dahilan ka ba? (Do you have a reason?)

The best translation will depend on the specific context and the desired level of formality.