Surat izin itu sudah ditandatangani oleh bos perempuan kami.

A simple breakdown is:

• surat izin = permit letter / permission letter
• itu = that / the
• sudah = already; marks the action as completed
• ditandatangani = signed
• oleh = by
• bos perempuan kami = our female boss

So the structure is basically:

[thing being talked about] + [completion marker] + [passive verb] + [agent]

That is why the sentence feels like The permit letter has already been signed by our female boss.

Ditandatangani is a passive verb meaning to be signed or signed in this sentence.

A useful learner-level way to think about it is:

• di- = passive marker
• tandatangan / tanda tangan relates to signature or signing
• -i is part of the verb formation here

The active version is menandatangani = to sign.
The passive version is ditandatangani = to be signed.

So:

• Bos kami menandatangani surat itu = Our boss signed the letter
• Surat itu ditandatangani oleh bos kami = The letter was signed by our boss

Because here di- is a prefix, not the preposition di meaning in/at/on.

In standard Indonesian spelling:

• di as a preposition is written separately:
  di kantor, di rumah
• di- as a passive prefix is written together with the verb:
  ditandatangani, dibaca, dibuat

So di tandatangani is incorrect in this sentence.

Indonesian uses the passive very naturally, often more often than English does.

Here, the speaker is focusing on the permit letter, not on the boss. That is why the sentence starts with Surat izin itu and uses the passive ditandatangani.

The active version would be:

Bos perempuan kami sudah menandatangani surat izin itu.

Both are correct, but they focus on different things:

• Passive: focuses on the letter
• Active: focuses on the boss

Sudah marks that the action is completed.

In many contexts, it can be translated as:

• already
• has/have
• has been / have been
• did, depending on the sentence

In this sentence, it tells you the signing is finished. So it gives the sense of:

• has already been signed
• or simply has been signed

It is often very natural in Indonesian even when English would not always say already.

In Indonesian, demonstratives like ini and itu usually come after the noun.

So:

• surat ini = this letter
• surat itu = that letter

And with a noun phrase:

• surat izin itu = that permit letter / the permit letter

This is normal Indonesian word order. English puts this/that before the noun, but Indonesian usually puts ini/itu after it.

It can feel like either one in translation.

Literally, itu is that, but in real Indonesian it often also helps make a noun phrase definite, which can sound like English the.

So surat izin itu could be understood as:

• that permit letter
• the permit letter

The exact English choice depends on context.

Oleh marks the agent in a passive sentence, like English by.

So:

• ditandatangani oleh bos perempuan kami = signed by our female boss

It can sometimes be omitted, especially in less formal speech, if the meaning is still clear:

Surat izin itu sudah ditandatangani bos perempuan kami.

That said, oleh sounds clearer and more standard, especially in careful or written Indonesian.

This is a very important Indonesian distinction:

• kami = we/us/our, excluding the listener
• kita = we/us/our, including the listener

So bos perempuan kami means our female boss, but your listener is not part of that our.

English just says our, so English speakers often have to learn to pay attention to this difference.

Yes, bos perempuan means female boss.

Indonesian usually puts the main noun first and the describing word after it:

• bos perempuan = female boss
• dokter perempuan = female doctor
• teman lama = old friend

So the pattern is normal.

However, whether it sounds natural depends on context. Sometimes Indonesians might simply say:

• bos kami if gender does not matter
• bos kami yang perempuan if they are distinguishing her from a male boss
• atasan perempuan kami in a more formal style

Bos is very common and natural in everyday Indonesian, but it is not the most formal choice.

More formal alternatives can include:

• atasan = superior / supervisor
• pimpinan = leader / management
• kepala = head, chief, head of a unit

So:

• bos = common, everyday
• atasan = more formal/professional

Your sentence is perfectly normal, but it is not especially formal.

Because Indonesian usually puts the main noun first, followed by the word that describes its type.

Here:

• surat = letter
• izin tells you what kind of letter it is

So:

• surat izin = permit letter / permission letter

This head-first pattern is very common in Indonesian.

Yes. Telah and sudah can both mark completed action.

Compare:

• Surat izin itu sudah ditandatangani ...
• Surat izin itu telah ditandatangani ...

The difference is mostly one of style:

• sudah = very common, everyday, natural in speech and writing
• telah = more formal, more common in writing or official language

Both are correct here.

They are similar, but not always identical in tone.

• perempuan = woman / female; very common and neutral in many contexts
• wanita = woman; often feels a bit more formal or institutional

In modern usage, nuance can vary depending on speaker and context, but in a sentence like this, perempuan clearly means the boss is female.

So bos perempuan kami is understandable and correct. In some contexts, someone might prefer bos wanita kami, but perempuan is completely normal.

A very natural active version is:

Bos perempuan kami sudah menandatangani surat izin itu.

That keeps the same meaning but changes the focus:

• Passive original: focus on the letter
• Active version: focus on the boss

Both are good Indonesian.