Lakon itu memiliki dua babak.

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

So:

• lakon itu = that play / the play
• buku ini = this book

This is normal Indonesian word order. English says that play, but Indonesian says play that.

In many sentences, itu can also make the noun feel definite, so lakon itu can mean not only that play but also something like the play, depending on context.

Memiliki means to have or to possess.

It is correct here, but it sounds a bit more formal or written than everyday speech. In casual Indonesian, people often use:

• punya = to have

So a more conversational version would be:

• Lakon itu punya dua babak.

Both are understandable, but memiliki sounds more polished or formal.

Indonesian nouns usually do not change form for plural the way English nouns do.

So:

• babak = act
• dua babak = two acts

The number dua already shows that it is plural, so there is no need to add anything like English -s.

Sometimes Indonesian can show plurality by reduplication, for example:

• babak-babak

But after a number, that is usually unnecessary.

Here, babak means an act in a play, drama, match, or other staged event.

In the sentence Lakon itu memiliki dua babak, it refers to the structure of the play:

• babak = act
• dua babak = two acts

Depending on context, babak can also mean a round or phase, such as in sports or competitions.

Not always. Lakon can have a few related meanings depending on context, including:

• a play
• a drama/storyline
• a role/character part in some contexts

In this sentence, because of dua babak, it clearly refers to a staged work, so play is a natural interpretation.

It is a somewhat literary or formal word. In everyday Indonesian, people might also use words like:

• drama
• cerita
• pertunjukan

depending on the exact meaning.

Indonesian does not use articles like English a, an, and the.

That means a noun can often stand alone:

• lakon = a play / the play / play

The exact meaning depends on context.

In this sentence, itu helps make lakon definite:

• lakon itu = that play / the play

But babak has no article because Indonesian simply does not need one:

• dua babak = two acts

Yes. That is a very natural alternative.

Compare the two:

• Lakon itu memiliki dua babak. → more formal, more written
• Lakon itu punya dua babak. → more everyday, conversational

Both mean the same thing here.

Sometimes learners want to say:

• Lakon itu ada dua babak.

A native speaker might understand it, but it is less natural for this meaning. Better options are:

• Lakon itu memiliki dua babak.
• Lakon itu punya dua babak.
• Lakon itu terdiri dari dua babak. = The play consists of two acts.

If you are talking about the structure of something, terdiri dari is also very common and natural.

It sounds fairly formal or written, mainly because of memiliki and to some extent lakon.

A more casual version would be:

• Drama itu punya dua babak.

So the original sentence is correct, but it feels more like something you might read in a review, article, or textbook than hear in everyday casual conversation.

The structure is:

• Lakon itu = subject
• memiliki = verb
• dua babak = object

So the pattern is:

• Subject + Verb + Object

More literally:

• play that + possesses/has + two acts

This is a very common Indonesian sentence pattern and matches English word order fairly closely, except for the position of itu after the noun.