Saya harus fotokopi kartu identitas lagi karena stempel di formulir pertama kurang jelas.

Indonesian does not use a separate infinitive marker like English to. After words like harus (must / have to), the next verb comes directly.

• Saya harus fotokopi = I have to photocopy
• not something like I have to to photocopy

This is normal Indonesian grammar.

Here, fotokopi is being used as a verb, meaning to photocopy.

A useful thing to know is that fotokopi can also be used as a noun in other contexts, and in more formal Indonesian you may also see memfotokopi for to photocopy.

So in this sentence:

• fotokopi kartu identitas = photocopy an ID card

In everyday Indonesian, especially in speech and informal writing, loanwords are often used directly as verbs without adding meN-. So fotokopi sounds natural and common.

• fotokopi = common, everyday
• memfotokopi = more formal or more textbook-like

Both can be correct, but the sentence you were given sounds very natural.

Lagi here means again or once more. It shows that the action needs to be repeated.

So:

• fotokopi kartu identitas lagi = photocopy the ID card again

Without lagi, the sentence would just mean the speaker has to photocopy the ID card, with no idea of repetition.

Kartu identitas literally means identity card or ID card. It is a general term for some kind of identification.

Depending on context, Indonesian may also use more specific terms. For example:

• KTP = Indonesian national ID card

But kartu identitas is broad, neutral, and easy to understand.

Indonesian often leaves possession unstated when it is obvious from context.

Because the sentence begins with Saya (I), listeners will usually assume the ID card belongs to the speaker unless there is some reason to think otherwise.

If you want to be explicit, you can say:

• kartu identitas saya = my ID card

But leaving out saya after the noun is very normal.

Indonesian has no articles like English a, an, or the.

So words like:

• kartu identitas
• stempel
• formulir

do not automatically include a or the. The listener figures that out from context.

That is why the same noun can be translated in different ways depending on the situation.

Karena means because. It introduces the reason.

The sentence has two parts:

• Saya harus fotokopi kartu identitas lagi = the main statement
• karena stempel di formulir pertama kurang jelas = the reason

So karena connects the action to its cause.

Here it is a preposition, not a passive prefix.

A good way to tell is this:

• di formulir → written separately → preposition = in/on/at the form
• passive di- attaches directly to a verb, like ditulis, dicap, distempel

So in this sentence, di formulir pertama means on the first form.

The Indonesian preposition di covers several English location words, including in, on, and at. English chooses between those more specifically, but Indonesian often uses just di.

So:

• di formulir is naturally translated as on the form
• di kantor = at the office
• di kotak = in the box

The exact English choice depends on context.

In Indonesian, modifiers usually come after the noun they describe.

So:

• formulir pertama = the first form
• rumah besar = big house
• orang tua = old person / parents depending on context

This word order is normal in Indonesian.

Literally, it means the first form.

It does not directly mean the original form. However, depending on the real-life situation, English might sometimes express it in a way that sounds more natural, such as referring to the earlier or first-submitted form.

But grammatically, pertama simply means first.

Here, stempel means an official stamp or seal mark on a document.

In this kind of sentence, it usually refers to the inked official stamp placed on paperwork, not a postage stamp.

Kurang jelas literally means less clear or not clear enough.

In natural English, it often means something like:

• too faint
• not clear enough
• not readable enough

So the idea is that the stamp on the first form did not come out clearly.

Both are possible, but they feel a little different.

• tidak jelas = not clear / unclear
• kurang jelas = not clear enough / somewhat unclear

Kurang jelas often sounds a bit softer and more practical. In document situations, it can suggest that something is visible, but not sufficiently sharp or readable.

Yes, but the meaning changes slightly.

• harus = must / have to → stronger obligation
• perlu = need to → a bit softer

So:

• Saya harus fotokopi kartu identitas lagi sounds more like a requirement
• Saya perlu fotokopi kartu identitas lagi sounds more like a need

The sentence follows a very common Indonesian pattern:

• Saya = subject
• harus = modal
• fotokopi = verb
• kartu identitas = object
• lagi = adverb
• karena ... = reason clause

A word-by-word breakdown looks like this:

• Saya = I
• harus = must / have to
• fotokopi = photocopy
• kartu identitas = ID card
• lagi = again
• karena = because
• stempel = stamp
• di formulir pertama = on the first form
• kurang jelas = not clear enough

So the order is very natural Indonesian: statement first, then the reason.