Mahusay ang pagganap ng bida at kontrabida.

Because Filipino often uses predicate-first word order. Here, Mahusay is the predicate, and ang pagganap ng bida at kontrabida is the topic.

So the structure is closer to:

Excellent is the performance of the protagonist and antagonist.

In more English-like order, you can also say:

Ang pagganap ng bida at kontrabida ay mahusay.

That version is also correct, just a bit more explicit or formal.

Ang marks the topic of the sentence.

Here, the topic is:

ang pagganap ng bida at kontrabida

That whole phrase is what the sentence is talking about.
Ang is not exactly the same as English the, even though it is often translated that way.

Because mahusay is being used as the predicate, not as a direct modifier inside the noun phrase.

Compare:

• Mahusay ang pagganap... = The performance is excellent.
• mahusay na pagganap = excellent performance

In the second case, mahusay directly modifies pagganap, so you use the linker na.
In the actual sentence, Mahusay stands separately as the predicate, so no na is needed.

Pagganap is a noun related to the verb gumanap, which means to perform or to play a role.

In this sentence, pagganap can mean:

• performance
• portrayal
• acting

So the sentence is talking about how well the lead and the villain were performed or portrayed.

Here, ng marks a genitive relationship. In English, this often corresponds to of.

So:

pagganap ng bida at kontrabida

means:

performance of the protagonist and antagonist

It links bida at kontrabida to pagganap.

Because bida at kontrabida is one coordinated phrase joined by at.

So the structure is:

ng [bida at kontrabida]

not:

ng bida at ng kontrabida

Using just one ng is normal because both nouns have the same relationship to pagganap.

They are most naturally understood as singular here:

• bida = the protagonist
• kontrabida = the antagonist

If you wanted to clearly show plural, you would usually add mga where appropriate.

Without mga, a learner should normally read this as one protagonist and one antagonist.

No. Mahusay does not change for singular vs. plural, or for gender.

So Filipino adjectives like mahusay stay the same whether you are describing:

• one performance
• several performances
• one person
• many people

That is different from English in some situations, but very normal in Filipino.

Not always. Bida often means the main character, lead, or protagonist. It can mean hero, but it does not always imply moral goodness.

Likewise, kontrabida usually means villain or antagonist.

So in a film or drama context, bida at kontrabida often refers to the main opposing characters.

It can point to either one, depending on context.

Because the key word is pagganap, the sentence usually refers to the performance/portrayal. That may mean:

• the actors’ acting in those roles, or
• the way the protagonist and antagonist were presented in the story

If the context is a movie review, many learners would understand it as praise for the acting or portrayal.

Yes, you can.

Magaling ang pagganap ng bida at kontrabida is also natural.

The difference is mostly nuance:

• magaling often stresses skill or talent
• mahusay can sound a little more polished, refined, or formally evaluative

In many everyday contexts, both work well.