Besok pagi, saya mengantar adik laki-laki saya ke sekolah sebelum pergi ke kantor.

In Indonesian, verbs usually do not change form to show tense the way English verbs do.

So:

• mengantar can mean take/escort
• pergi can mean go

Whether the action is past, present, or future is often shown by time words, not by changing the verb. Here, besok pagi already makes the time clear, so no special future verb form is needed.

You could sometimes add akan to make the future more explicit, but in this sentence it would usually be unnecessary.

Indonesian often puts time expressions near the beginning of a sentence to set the scene first.

So Besok pagi, saya mengantar ... is very natural and means something like:

• As for tomorrow morning...
• Tomorrow morning, I...

You could also place the time later, but the beginning is common and smooth, especially in narration.

The comma separates the introductory time phrase from the main clause.

So:

• Besok pagi, saya mengantar ...

works like English Tomorrow morning, I take...

In Indonesian writing, this comma is common and helps readability. In informal writing, people sometimes leave it out, but using it here is perfectly standard.

This is a very common learner question.

• adik = younger sibling
• laki-laki = male

So adik laki-laki means younger brother.

Indonesian often cares about older vs. younger sibling more explicitly than English does:

• adik = younger sibling
• kakak = older sibling

If you want to specify gender, you add:

• adik laki-laki = younger brother
• adik perempuan = younger sister

So the sentence is being precise.

Because the two saya have different jobs:

• the first saya = I (subject)
• the second saya = my (possessor)

In Indonesian, possession is often shown by putting the possessor after the noun:

• adik saya = my younger sibling
• adik laki-laki saya = my younger brother

So even though English changes I to my, Indonesian just uses saya in both places, and the grammar around it shows the difference.

The base root is antar, but in standard Indonesian, the active transitive verb usually takes the meN- prefix, giving mengantar.

So:

• antar = root
• mengantar = to take/escort someone somewhere

This is the normal form when the subject is actively doing the action to an object:

• Saya mengantar adik saya. = I take my younger sibling.

You may hear bare antar in casual speech or commands, but mengantar is the standard form here.

ke is a preposition meaning to, toward, or to a place.

So:

• ke sekolah = to school
• ke kantor = to the office

It is used before destinations or locations being moved toward.

This is different from:

• di = at/in/on
• dari = from

For example:

• Saya pergi ke kantor. = I go to the office.
• Saya di kantor. = I am at the office.
• Saya pulang dari kantor. = I go home from the office.

Because the subject is understood to be the same subject as in the main clause: saya.

So sebelum pergi ke kantor naturally means:

• before going to the office
• before I go to the office

Indonesian often leaves out the subject in a subordinate clause when it is already clear from context.

You could say:

• sebelum saya pergi ke kantor

but in this sentence, leaving out saya is very natural.

Yes, in this sentence that is the natural interpretation.

Because the main subject is saya, the listener understands that the omitted subject of pergi is also saya.

If the subject were different, Indonesian would usually need to state it more clearly. For example, if it meant before my younger brother goes to school, the wording would need to change.

So here, the omitted subject is understood from context.

Indonesian does not have articles that work like English a/an/the.

So nouns such as:

• sekolah
• kantor

can be understood from context as:

• school
• the school
• a school
• the office
• an office

In this sentence, context makes ke sekolah and ke kantor sound natural as to school and to the office/work.

Learners often want to add something to mean the, but usually Indonesian simply does not need it.

Yes, adik alone could work if the gender is either:

• already known from context, or
• not important

But adik by itself is gender-neutral: it means younger sibling.

Adding laki-laki makes it explicit that the sibling is male. So:

• adik saya = my younger sibling
• adik laki-laki saya = my younger brother

The longer form is just more specific.

Both are possible in many situations, but mengantar is the simpler and very natural choice here.

Broadly speaking:

• mengantar = to escort/take someone somewhere
• mengantarkan = can sound a bit more explicitly like delivering/taking something or someone to a destination

In everyday use, there is overlap, and speakers may use both. But for this sentence, mengantar adik laki-laki saya ke sekolah is completely normal and idiomatic.

Because Indonesian possessive structure usually works like:

• noun + possessor

So:

• buku saya = my book
• rumah saya = my house
• adik laki-laki saya = my younger brother

This is one of the biggest word-order differences from English. English usually says my brother, but Indonesian says the equivalent of brother my.

That pattern is completely normal in Indonesian.