Ang ilan sa mga bisita ay nasa kusina.

Ang marks the noun phrase that is being talked about as the sentence topic/focus.

Here, ang ilan sa mga bisita means some of the guests as the topic of the sentence.

So the structure is roughly:

• Ang ilan sa mga bisita = the topic
• ay nasa kusina = what is being said about that topic

In natural English terms, ang helps signal the ones we’re talking about are some of the guests.

Ilan basically refers to an unspecified small number.

Depending on context, it can mean things like:

• some
• several
• a few

In this sentence, ang ilan sa mga bisita means some of the guests or a few of the guests.

A learner should also know that ilan can be used in questions to mean how many?, but that is a different use. Here it is not a question word; it is an indefinite quantity word.

This is a partitive structure. It shows that the some comes from a larger group.

So:

• ilan = some / a few
• sa mga bisita = of the guests / among the guests

Together, ilan sa mga bisita means:

• some of the guests
• a few of the guests

This is very similar to English some of the guests, where of the guests identifies the larger set.

Mga is the plural marker.

• bisita = guest / visitor
• mga bisita = guests / visitors

Since the sentence is talking about some of the guests, the noun has to be plural, so mga is needed.

A useful point: Filipino nouns do not usually change form for plural the way English nouns do. Instead, plural is often marked with mga.

Ay marks an inverted sentence pattern.

The more neutral or everyday order is often:

• Nasa kusina ang ilan sa mga bisita.

But this sentence uses:

• Ang ilan sa mga bisita ay nasa kusina.

Both mean the same thing.

So what does ay do? It links the fronted topic to the rest of the sentence. You can think of it as a marker that says, the topic has been placed first.

This ay style is common in:

• more formal writing
• careful speech
• textbook examples

In everyday conversation, many speakers prefer the version without ay: Nasa kusina ang ilan sa mga bisita.

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

In English, you say:

• Some of the guests are in the kitchen.

In Filipino, the location expression itself can function as the predicate:

• nasa kusina = in the kitchen / located in the kitchen

So the sentence does not need a separate word for are.

This is a very common pattern in Filipino:

• Nasa bahay siya. = He/She is at home.
• Nasa mesa ang libro. = The book is on the table.

Nasa usually means is in/at/on or are in/at/on, depending on context.

It is commonly analyzed as coming from na + sa, but for learners it is usually easiest to treat nasa as a very common location word meaning located at/in/on.

Compare:

• sa kusina = in the kitchen / to the kitchen / at the kitchen, depending on context
• nasa kusina = is/are in the kitchen

So in this sentence, nasa kusina clearly expresses location.

Yes, it is natural, but many speakers would more commonly say:

• Nasa kusina ang ilan sa mga bisita.

This predicate-first order is very common in spoken Filipino.

So you can think of these as two equivalent patterns:

1. Ang ilan sa mga bisita ay nasa kusina.
   More formal, topic-first with ay

2. Nasa kusina ang ilan sa mga bisita.
   Very common, natural everyday order

Both are correct.

Not usually in the same way.

Ilang bisita means some guests or a few guests, but it does not mean some of the guests.

Compare:

• ilang bisita = some guests
• ilan sa mga bisita = some of the guests

The sentence you were given refers to part of a known group of guests, so ilan sa mga bisita is the better expression.

Also, if you front that phrase in an ay sentence, you would normally still mark the topic properly:

• Ang ilang bisita ay nasa kusina. = Some guests are in the kitchen.
• Ang ilan sa mga bisita ay nasa kusina. = Some of the guests are in the kitchen.

These are similar, but not identical.

This is an important distinction.

• ang ilang bisita = some guests
  This just refers to an unspecified set of guests.

• ang ilan sa mga bisita = some of the guests
  This clearly means a subset of a larger, identifiable group.

So if there is a known guest list or a group already being discussed, ilan sa mga bisita is more precise.

Example difference:

• Ang ilang bisita ay dumating nang maaga.
  Some guests arrived early.

• Ang ilan sa mga bisita ay dumating nang maaga.
  Some of the guests arrived early.

The second one emphasizes that we are choosing part of a specific group.

Not by itself in this sentence.

Here, ilan is intentionally vague. It means some, a few, or several, depending on context. It does not tell you an exact number.

If you wanted to be exact, you would use a number instead, such as:

• tatlo sa mga bisita = three of the guests
• lima sa mga bisita = five of the guests

So ilan gives quantity without precision.

The base noun bisita does not change form. Filipino nouns usually stay the same whether singular or plural.

Plural is shown by mga:

• bisita = guest / visitor
• mga bisita = guests / visitors

So in this sentence, the noun phrase is plural because of mga.

Yes. Depending on context, very natural translations include:

• Some of the guests are in the kitchen.
• A few of the guests are in the kitchen.
• Several of the guests are in the kitchen.

The exact English choice depends on tone and context. Ilan does not force one single English word.

Usually no, not in standard grammar.

If you start with the topic phrase:

• Ang ilan sa mga bisita ...

then standard Filipino normally expects ay before the predicate:

• Ang ilan sa mga bisita ay nasa kusina.

If you want to omit ay, the more natural option is to switch to the usual predicate-first order:

• Nasa kusina ang ilan sa mga bisita.

So the safe rule is:

• topic first → usually use ay
• predicate first → no ay needed

It can be understood either way in English, depending on what sounds most natural.

In this pattern, sa helps form the meaning from within that group. So:

• ilan sa mga bisita = some of the guests
• literally, something like some among the guests

English usually translates it as of the guests, because that sounds most natural in this construction.

So yes, the idea is part of a group.