Kami berakting saat gladi resik.

Both kami and kita can mean we, but they are different:

• kami = we, not including the person being spoken to
• kita = we, including the person being spoken to

So Kami berakting saat gladi resik means the speaker’s group was acting, but the listener was not part of that group.

Akting comes from English acting and is used in Indonesian as a noun or verb base related to performing/acting.

The prefix ber- often makes a verb that means to do an activity or to be engaged in something.

So:

• akting = acting / performance
• berakting = to act / to perform

In this sentence, berakting means to be acting / to perform.

Yes, berakting is understandable and used, especially in modern Indonesian. Because it is based on a loanword, it can sound a bit informal or entertainment-related.

Other possibilities include:

• bermain = to play / to act
• bermain peran = to play a role
• tampil = to appear / perform

For example, depending on context, someone might also say:

• Kami bermain saat gladi resik
• Kami tampil saat gladi resik

But berakting is perfectly fine if the context is clearly about acting.

Saat means when, while, or at the time of, depending on context.

In this sentence, it connects the action to a time/event:

• Kami berakting saat gladi resik = We acted / were acting during the dress rehearsal

Common similar words are:

• ketika = when
• waktu = when / time
• pada saat = at the time of

So saat is a normal and natural time connector here.

Gladi resik means dress rehearsal or final full rehearsal before the real performance/event.

It is a fixed Indonesian expression. Even though the individual words may not be very transparent to learners, together they commonly refer to the final rehearsal where everything is practiced as if it were the real event.

This phrase is often used for:

• theater performances
• ceremonies
• school events
• official events

Indonesian usually does not mark tense on the verb the way English does.

So berakting by itself does not mean specifically:

• act
• acted
• was acting
• will act

The time is understood from context, or from time words such as:

• kemarin = yesterday
• sekarang = now
• besok = tomorrow
• saat gladi resik = during the dress rehearsal

Because of this, the sentence could be translated in English in different ways depending on context, such as:

• We acted during the dress rehearsal
• We were acting during the dress rehearsal

The word order is very typical Indonesian:

• Kami = subject
• berakting = verb
• saat gladi resik = time expression

So the pattern is basically:

Subject + Verb + Time phrase

This is one of the most common and straightforward sentence patterns in Indonesian.

Yes. Indonesian is fairly flexible with time expressions.

These are all possible:

• Kami berakting saat gladi resik.
• Saat gladi resik, kami berakting.

Both are natural. The difference is mainly emphasis:

• Kami berakting saat gladi resik focuses first on what we did
• Saat gladi resik, kami berakting focuses first on when it happened

No. Indonesian does not use articles like a, an, or the.

So gladi resik can mean:

• a dress rehearsal
• the dress rehearsal

The exact meaning depends on context. English requires an article, but Indonesian does not.

Sometimes yes, if the subject is already clear from context. Indonesian often leaves out subjects when they are understood.

For example, in conversation, someone might just say:

• Berakting saat gladi resik.

But on its own, that sounds less complete. In a normal standalone sentence, Kami berakting saat gladi resik is clearer and more natural.

It is generally neutral and natural.

• kami is normal in both spoken and written Indonesian
• saat is slightly more neutral/written than very casual conversation, but still common
• berakting is modern and understandable, with a somewhat everyday/media feel
• gladi resik is a standard expression

So the whole sentence sounds normal and acceptable in many contexts.