Learn Hardcore Indonesian: Nanti kita gantian presentasi supaya adil. - Later we’ll take turns presenting so it’s fair.

kita = we/us including the listener (“you and I (and possibly others)”).
kami = we/us excluding the listener.
Here you’re proposing a plan that includes the person you’re talking to, so kita is correct.

What does gantian mean exactly, and how is it formed?

Base word: ganti = to change/replace.
Suffix -an makes gantian, which in this context means “taking turns / by turns.”
It can also mean “it’s someone else’s turn” in casual speech (e.g., Gantian, dong! = “Let me have a turn!”).

What’s the difference between gantian, bergantian, bergiliran, and giliran?

gantian: casual, very common in speech. “take turns” (adverb-like). Example: Kita gantian presentasi.
bergantian: a bit more formal/neutral; same idea of alternation. Example: Kita presentasi bergantian.
bergiliran: more formal or written; emphasizes rotation by “turns.” Example: Kita bergiliran presentasi.
giliran: a noun meaning “turn.” Example: Gilirannya siapa? (Whose turn is it?)

Is presentasi a noun or a verb here?

In Indonesian, presentasi can function as a verb in everyday use: presentasi = “to present (give a presentation).”
Alternatives:
- memberi/mengadakan presentasi = to give/hold a presentation.
- mempresentasikan (sesuatu) = to present (something) [more formal; takes an object]. Example: mempresentasikan laporan.

Can I replace supaya with biar or agar?

All mean “so that / in order to,” with register differences:
- biar: informal, very common in speech. Biar adil.
- supaya: neutral, widely acceptable.
- agar: more formal/written. Agar adil.

Is supaya adil okay even though there’s no subject after supaya?

Yes. Indonesian often omits an obvious subject. supaya adil = “so [that it’s] fair.”
You could make it explicit: supaya semuanya adil (“so everything is fair”) or add degree: supaya lebih adil (“so it’s fairer”).

Where can I put nanti, and does its position matter?

Flexible placement; meaning stays “later,” with slight emphasis changes:
- Nanti kita gantian presentasi… (neutral; sets time first)
- Kita nanti gantian presentasi… (focus on “we,” time in the middle)
- Kita gantian presentasi nanti… (time info at the end)
nanti is vague; add detail if needed: nanti siang (later this afternoon), nanti malam (tonight), besok (tomorrow), sebentar lagi (in a moment/soon).

Do I need akan to mark the future?

No. Indonesian often omits a future marker when context is clear.
Options:
- No marker: Nanti kita gantian… (natural)
- akan (neutral/formal): Kita akan gantian…
- bakal (informal/regional): Kita bakal gantian…

Is the whole sentence casual or formal?

It’s neutral-casual, suitable for colleagues, classmates, friends.
More formal rephrasing: Nanti kita (atau kami) akan bergiliran mempresentasikan materi agar adil.

Can I say Nanti kita presentasinya gantian? What does -nya do?

Yes. presentasinya nominalizes/focuses the noun “presentation” (“the presenting part”).
Kita presentasinya gantian ≈ “For the presentation part, we’ll take turns.” It’s a natural colloquial structure.

How do I talk about “turns” explicitly?

“Turn”: giliran
Useful phrases:
- Gilirannya siapa? = Whose turn is it?
- Ini giliran saya. = It’s my turn.
- Gantian, ya? = Let’s switch / My turn now, okay?
- Kita bagi giliran. = Let’s divide up the turns.

Any subtle differences between saying adil and alternatives like “equally”?

adil = fair/just (focus on fairness).
To stress equal distribution, you might hear:
- biar merata / biar rata = so it’s evenly distributed (more about evenness than justice).
In this context, supaya adil is the most idiomatic.