Kami membawa uang tunai kalau-kalau kartu tidak bisa dipakai.

Kami means we, but it is exclusive: it does not include the person being spoken to.

Kita also means we, but it is inclusive: it does include the listener.

So in this sentence, kami membawa uang tunai... means we brought cash..., where we refers to the speaker’s group, not necessarily the person they are talking to.

Bawa is the basic root meaning carry / bring.

Membawa is the more standard verb form with the meN- prefix. In normal written and careful spoken Indonesian, membawa is what you would usually use.

• bawa = more casual / colloquial
• membawa = more standard

So:

• Kami membawa uang tunai = standard
• Kami bawa uang tunai = natural in casual speech

Uang tunai means cash.

• uang = money
• tunai = cash / in cash / immediate payment

So together, uang tunai is the normal expression for cash, as opposed to paying by card or transfer.

Kalau-kalau means something like:

• just in case
• in case
• for fear that

It is not just a repeated version of ordinary kalau.

Compare:

• kalau = if
• kalau-kalau = in case / just in case

So in this sentence:

• Kami membawa uang tunai kalau-kalau kartu tidak bisa dipakai.
• We brought cash just in case the card couldn’t be used.

The repetition creates a special expression with a precautionary meaning.

Sometimes learners want to replace it with kalau, but the meaning changes.

• kalau usually introduces a normal if condition
• kalau-kalau suggests taking precaution in advance

So:

• kalau kartu tidak bisa dipakai = if the card can’t be used
• kalau-kalau kartu tidak bisa dipakai = just in case the card can’t be used

In this sentence, kalau-kalau is better because bringing cash is a precaution.

Kartu just means card. In context, it often refers to whatever payment card is relevant:

• debit card
• credit card
• bank card
• card in general

Indonesian often leaves things more general if the context is clear. So kartu here can naturally mean the card or our card without saying exactly what kind.

Dipakai is the passive form of pakai (to use / wear).

• pakai = use
• dipakai = be used

So:

• kartu tidak bisa dipakai = the card cannot be used

This is very natural in Indonesian. It focuses on the card as the thing being used, rather than on who is using it.

You could think of it as:

• active: kita tidak bisa memakai kartu itu = we can’t use that card
• passive: kartu itu tidak bisa dipakai = that card can’t be used

The passive version is especially common when talking about whether something functions or is acceptable for use.

Both can mean be used, but there is a nuance:

• dipakai = very common, everyday, natural
• digunakan = a bit more formal or neutral

So:

• kartu tidak bisa dipakai = very natural in daily speech
• kartu tidak bisa digunakan = also correct, slightly more formal

In this sentence, dipakai sounds very normal.

It can suggest either, depending on context.

Literally, it means cannot be used. But in a situation like payments, English would often express this as:

• the card might not work
• the card might not be accepted
• the card may be unusable

So the Indonesian phrase is broader than a single English wording. It could mean:

• the machine won’t accept it
• the card reader is down
• the place doesn’t take cards
• the card has a problem

Indonesian does not use articles like a/an/the the way English does.

So:

• uang tunai can mean cash
• kartu can mean a card, the card, or cards, depending on context

The listener figures it out from the situation.

That is why kartu tidak bisa dipakai can naturally be understood as:

• the card can’t be used
• a card can’t be used
• cards can’t be used

In this sentence, context usually makes it mean the/our card or card payment in general.

Yes, the word order is normal.

Breakdown:

• Kami = we
• membawa = brought / carried
• uang tunai = cash
• kalau-kalau = just in case
• kartu = the card / card
• tidak bisa dipakai = cannot be used

So the structure is:

subject + verb + object + reason/precaution clause

That is completely natural in Indonesian.

You could also move things around for emphasis, but the given order is very standard.

Yes. Indonesian verbs do not change form for tense the way English verbs do.

So membawa does not itself mark past tense. The time comes from context.

Depending on context, this could mean:

• We brought cash just in case...
• We’re bringing cash just in case...
• We bring cash just in case...

In many contexts, English would translate it as brought, but Indonesian itself is not marking tense directly here.

Yes, it sounds natural and correct.

In casual conversation, some speakers might say a more relaxed version such as:

• Kami bawa uang tunai kalau-kalau kartu nggak bisa dipakai.

Differences:

• bawa instead of membawa = more casual
• nggak instead of tidak = more casual

But the original sentence is perfectly natural and a good standard model to learn from.