Marami ang bayarin.

Because Filipino often puts the predicate first.

In Marami ang bayarin:

• marami = the predicate, describing quantity
• ang bayarin = the topic/subject of the sentence

So the structure is roughly:

• [Predicate] + [ang-phrase]

A very literal breakdown would be something like:

• Many are the bills / payables

This is a normal Filipino sentence pattern, even though it feels backward compared with English.

Ang marks the topic/subject of the sentence.

In this sentence, ang bayarin is the thing being talked about, and marami says something about it.

So ang does not simply mean the in the English sense. Sometimes it can look similar to the in translation, but its real job is grammatical: it marks the noun phrase that the sentence is centered on.

Here:

• ang bayarin = the bills / the payments due / the expenses, as the topic of the sentence

Bayarin comes from bayad (payment) and refers to something that needs to be paid.

Depending on context, bayarin can mean:

• bills
• dues
• expenses
• amounts to pay
• payables

So in real life, the exact English word depends on the situation.

For example:

• household context: bills
• office/accounting context: payables
• everyday money talk: expenses

Because plurality is often already clear from marami.

Since marami means many / a lot, it already tells you that bayarin is plural in meaning. Filipino does not always need mga when another word already shows plurality.

So:

• Marami ang bayarin = perfectly natural
• Marami ang mga bayarin = possible in some contexts, but often sounds heavier or more marked than necessary

In many cases, Filipino prefers the simpler version when the plural idea is already obvious.

Both can mean something like There are many bills/expenses, but the structure is different.

Marami ang bayarin

• full sentence
• marami is the predicate
• ang bayarin is the subject/topic

This has a complete-sentence feel:

• The bills are many
• There are many bills

Maraming bayarin

• maraming directly modifies bayarin
• it is often just a noun phrase: many bills
• depending on context, it can also function as a sentence fragment or part of a larger sentence

So:

• Marami ang bayarin. = a complete statement
• Maraming bayarin = many bills, unless used in a larger sentence

Because maraming is used when marami directly modifies a noun.

For example:

• maraming bayarin = many bills

Here, marami takes the linker -ng because it is directly attached to bayarin.

But in Marami ang bayarin, marami is not directly modifying the noun. It is the predicate of the sentence, and ang bayarin is a separate subject phrase.

So:

• maraming bayarin = one noun phrase
• marami ang bayarin = full sentence with predicate + subject

That is why maraming ang bayarin is not correct here.

No. Filipino can make perfectly complete sentences without a verb like English is/are.

In English, you need:

• The bills are many
• There are many bills

In Filipino, marami can serve as the predicate by itself:

• Marami ang bayarin.

So there is no missing word. The sentence is already complete.

It is best thought of as a quantity word that can behave like an adjective, pronoun, or predicate depending on the sentence.

In Marami ang bayarin, it functions as the predicate and expresses quantity.

You will also see it in other roles:

• Maraming tao. = many people
  → here it modifies a noun

• Marami sila. = They are many / There are many of them
  → here it works as the predicate again

So calling it just an adjective is sometimes too narrow. For learners, quantity word is often the most useful label.

Yes. That is grammatical.

• Marami ang bayarin.
• Ang bayarin ay marami.

Both mean basically the same thing.

The difference is mainly in style and emphasis:

• Marami ang bayarin sounds more natural and conversational in many situations
• Ang bayarin ay marami sounds a bit more formal, deliberate, or written

The version with ay rearranges the sentence so the ang-phrase comes first.

By itself, bayarin can be understood in a general or collective way, and context decides the exact number.

In this sentence, the number is clearly plural because of marami.

So here, learners should understand bayarin as something like:

• bills
• payments due
• expenses

The word itself does not need an English-style plural ending.

You may hear madami in casual speech, but marami is generally considered the standard form.

So for learning and careful usage, use:

• marami

rather than:

• madami

A native speaker may say either in conversation, but textbooks and formal writing usually prefer marami.

Not always exactly.

A helpful beginner shortcut is:

• ang bayarin ≈ the bills / the expenses

But grammatically, ang is not just an English article. It marks the topic/subject. So the phrase can feel more like:

• the bills
• the expenses
• the payments due
• as for the bills

depending on context.

So the bills is often a useful translation, but not a perfect one-to-one match.

A very useful way is:

• marami = what is being said about something
• ang bayarin = the thing being talked about

So the sentence pattern is:

• Predicate: marami
• Subject/Topic: ang bayarin

That makes Marami ang bayarin a straightforward Filipino predicate-first sentence meaning that the bills/payables are numerous.