Nasa kuwaderno ko ang paalala ng guro para sa takdang-aralin.

Because Filipino often puts the predicate first. Here, nasa kuwaderno ko is the predicate, and it tells the location: is in my notebook.

Nasa is a very common locative form meaning something like is in / is at / is on. So:

Nasa kuwaderno ko = It is in my notebook

After that comes the ang-phrase, which is the thing being talked about:

ang paalala ng guro para sa takdang-aralin

So the structure is basically:

[Location] + [the thing located there]

Sa by itself is mainly a marker meaning in, on, at, to, for depending on context.

Nasa is used when you want to say something is located somewhere. In this sentence, it works like is in.

Compare:

sa kuwaderno ko = in my notebook
nasa kuwaderno ko = is in my notebook

So if you want a full locational predicate, nasa is the natural choice.

Both can mean my notebook, but kuwaderno ko is the more common everyday pattern.

In Filipino, possessive pronouns often come after the noun:

kuwaderno ko = my notebook
bahay niya = his/her house

You can also use the preposed form:

aking kuwaderno

That version can sound more formal, literary, or emphatic in some contexts. For most ordinary speech, kuwaderno ko is the normal choice.

Ang marks the topic of the sentence, or the noun phrase the sentence is centered on.

In this sentence, the thing being identified and located is:

ang paalala ng guro para sa takdang-aralin

So the sentence is about the teacher’s reminder for the homework and says where it is.

A useful way to think about it is:

• nasa kuwaderno ko = predicate/location
• ang paalala... = topic/item being located

Ang is not always exactly the same as English the, but in many sentences it lines up with a definite noun phrase.

Here, ng guro connects guro to paalala and shows a relationship like the teacher’s reminder or a reminder from the teacher.

So:

paalala ng guro = the teacher’s reminder

In English, we might translate this with ’s: the teacher’s reminder

Or sometimes with from: a reminder from the teacher

Because paalala is a noun, ng guro is not acting like the agent of a verb here. It is simply modifying the noun and identifying whose reminder it is.

Because guro is a common noun, not a personal name.

Use ng with common nouns:

ng guro = of the teacher

Use ni with personal names:

ni Maria = of/by Maria

So:

• paalala ng guro
• paalala ni Maria

That is why ng guro is correct here.

Para sa usually means for. In this sentence, it shows what the reminder is related to.

So:

paalala ... para sa takdang-aralin = a reminder ... for/about the homework

Depending on context, English might translate it as:

• for the homework
• about the homework
• regarding the homework assignment

So para sa takdang-aralin is telling you what the reminder concerns.

Because the relationship is not simple possession.

Ng takdang-aralin would sound more like of the homework, which is usually not the intended meaning here. The reminder is not something the homework owns.

The meaning is that the reminder is for or about the homework, so para sa is the better connector.

Compare the ideas:

• paalala ng guro = the teacher’s reminder
• paalala para sa takdang-aralin = reminder for/about the homework

They express different kinds of relationships.

Takdang-aralin is a fixed expression meaning homework or assignment.

It is traditionally analyzed as a compound built from:

• takda = assigned
• aralin = lesson/study

So the overall idea is something like assigned lesson/work, which became the standard word for homework.

You will often see it written as takdang-aralin with a hyphen in standard usage. As a learner, it is best to memorize it as one vocabulary item meaning homework.

Because Filipino often does not need a separate verb like English is/are in this kind of sentence.

English says:

The reminder is in my notebook.

Filipino can say:

Nasa kuwaderno ko ang paalala...

The meaning of is located in is already carried by nasa, so no extra copula is needed.

This is very normal in Filipino grammar.

Yes. That is also correct.

This version uses ay, which is an inversion marker, not exactly the verb is. It lets you put the ang-phrase first:

Ang paalala ng guro para sa takdang-aralin ay nasa kuwaderno ko.

This has the same basic meaning as:

Nasa kuwaderno ko ang paalala ng guro para sa takdang-aralin.

The difference is mainly word order and emphasis:

• Nasa kuwaderno ko... emphasizes the location first.
• Ang paalala... ay nasa kuwaderno ko presents the topic first.

It modifies paalala, not guro.

So the meaning is:

the teacher’s reminder for/about the homework

not

the teacher for the homework

Even though Filipino word order can sometimes create long noun phrases, the meaning here is naturally understood as:

[paalala ng guro] [para sa takdang-aralin]

That is, it is a reminder from the teacher, and that reminder concerns the homework.

No. Kuwaderno is a standard Filipino word for notebook, and it is very natural here.

You may also hear borrowed forms like notbuk in casual speech, depending on the speaker and region. But kuwaderno is a solid, standard choice and very common in learning materials.

So in this sentence, kuwaderno ko is perfectly natural.