Marami akong tanong tungkol sa bagong aralin.

Filipino often puts the quantity or predicate first. In Marami akong tanong, the structure is basically:

• Marami = many/a lot
• ako = I
• -ng = linker
• tanong = questions

So literally, it is something like Many are my questions or I have many questions.

This kind of word order is very natural in Filipino. It is common to begin with the descriptive idea first, instead of the subject like in English.

Akong is ako plus the linker -ng:

• ako = I
• -ng = linker that connects words smoothly

So:

• Marami akong tanong

can be understood as I have many questions.

The linker helps connect ako to tanong in this pattern. You will see this kind of linking often in Filipino.

Because Filipino usually needs a linker between certain words.

Here, ako and tanong are connected by -ng, giving:

• ako + -ng = akong

Without the linker, ako tanong would sound ungrammatical.

Linkers are very common in Filipino. For example:

• bagong aralin = new lesson
• mabait na bata = kind child
• akong estudyante = I, as a student / student that I am

In your sentence, the linker is part of the natural construction.

For the same reason: Filipino uses a linker between an adjective and the noun it describes.

• bago = new
• aralin = lesson
• bagong aralin = new lesson

So -ng links bago to aralin.

A very common rule is:

• If the first word ends in a vowel, n, or sometimes w, it often takes -ng
• Otherwise, na is used

Examples:

• bagong aralin
• malaking bahay
• mabait na guro

Marami means many or a lot. In this sentence, it functions more like a predicate expressing quantity.

So Marami akong tanong means I have many questions.

It is not working exactly like English many in many questions, even though the meaning is similar. Filipino often builds this idea through a predicate structure rather than directly copying English adjective order.

You can compare:

• Marami akong tanong. = I have many questions.
• May marami akong tanong. = possible in some contexts, but less natural here
• May mga tanong ako. = I have questions.

Filipino often expresses possession without a direct equivalent of English have.

Instead of saying I have many questions with a verb like have, Filipino commonly uses a structure like:

• Marami akong tanong
• literally: Many are my questions

Another very common possession pattern uses may:

• May tanong ako. = I have a question.
• May mga tanong ako. = I have questions.

So Filipino does not always need a separate verb meaning have.

Here, sa introduces the object of the expression tungkol sa, which means:

• about
• concerning
• regarding

So:

• tungkol sa bagong aralin = about the new lesson

You can think of tungkol sa as a fixed expression. It is very commonly used when talking about topics.

Examples:

• tanong tungkol sa aralin = question about the lesson
• usapan tungkol sa trabaho = conversation about work

Yes. Ukol sa and hinggil sa can also mean about/regarding.

For example:

• Marami akong tanong ukol sa bagong aralin.
• Marami akong tanong hinggil sa bagong aralin.

These are understandable and correct, but tungkol sa is very common and natural in everyday Filipino.

Roughly speaking:

• tungkol sa = common, neutral
• ukol sa = a bit more formal or written
• hinggil sa = also somewhat formal

In Filipino, nouns do not always need a special plural marker when the quantity is already clear.

Here, marami already tells you there is more than one question:

• Marami akong tanong = I have many questions

Because marami already shows plurality, mga is usually unnecessary here.

You could compare:

• May tanong ako. = I have a question.
• May mga tanong ako. = I have questions.
• Marami akong tanong. = I have many questions.

So tanong can stay in its basic form.

Aralin can mean several related things depending on context, including:

• lesson
• topic
• study material
• sometimes subject matter

In bagong aralin, the most natural meaning is usually new lesson or new topic.

That is because in school-related contexts, aralin often refers to the material currently being studied.

Yes, you may hear or see Marami akong mga tanong, but in many cases it sounds less natural than Marami akong tanong.

Why?

Because marami already expresses plurality, so adding mga can feel redundant.

Usually the more natural version is:

• Marami akong tanong.

Still, in some contexts speakers may include mga for emphasis or style. But for a learner, Marami akong tanong is the better default.

It is generally neutral and natural. You can use it in class, in conversation, or in writing.

• Marami akong tanong tungkol sa bagong aralin.

It sounds polite and normal. It is not especially slangy, and it is not overly formal either.

If you wanted to sound more formal, you might choose words like hinggil sa or ukol sa:

• Marami akong tanong hinggil sa bagong aralin.

But the original sentence is already perfectly appropriate in most situations.

Yes.

• tanong = question
• katanungan = question/inquiry

Katanungan often sounds a little more formal or more written than tanong.

So:

• Marami akong tanong tungkol sa bagong aralin. = natural, everyday
• Marami akong katanungan tungkol sa bagong aralin. = slightly more formal

Both are correct. For ordinary speech, tanong is usually the more common choice.