Marumi ang kusina kapag may basura sa sahig.

Filipino often uses a predicate-first word order.

So Marumi ang kusina literally follows the pattern:

• Marumi = dirty
• ang kusina = the kitchen

This is a very normal way to say The kitchen is dirty in Filipino.

English usually starts with the subject, but Filipino often starts with the description, condition, or action first.

You could also say:

• Ang kusina ay marumi.

This means the same thing, but it sounds a bit more formal or structured. In everyday speech, Marumi ang kusina is very natural.

Ang is a very common marker in Filipino. It does not translate neatly into just one English word.

In this sentence, ang marks kusina as the topic/focus of the statement:

• ang kusina = the kitchen

So in Marumi ang kusina, the thing being described as dirty is the kitchen.

A useful beginner way to think about ang is:

• it often marks the main noun being talked about

It is not exactly the same as English the, but in many simple sentences it can feel similar.

Filipino often does not need a separate verb like is/are in simple descriptive sentences.

In English:

• The kitchen is dirty.

In Filipino:

• Marumi ang kusina.

The meaning of is is understood automatically. This is very common when describing something with an adjective or noun.

Other examples:

• Malaki ang bahay. = The house is big.
• Mabait siya. = He/She is kind.

So the absence of is is normal grammar, not something missing.

Kapag usually means when or whenever, and sometimes if in a condition that is expected or repeatedly true.

In this sentence:

• kapag may basura sa sahig = when/whenever there is trash on the floor

So the sentence expresses a general truth:

• The kitchen is dirty when there is trash on the floor.

Compared with kung:

• kapag often sounds like a more regular, expected, or repeated condition
• kung is a broader if word

Very roughly:

• Kapag umuulan, malamig. = When it rains, it is cold.
• Kung umulan bukas, hindi tayo aalis. = If it rains tomorrow, we will not go out.

In many casual situations, learners will hear some overlap, but kapag is a good fit here because it sounds like a general situation.

May means there is / there are / has / have, depending on the sentence.

Here:

• may basura = there is trash

So:

• kapag may basura sa sahig = when there is trash on the floor

This is one of the most useful Filipino words to learn.

Examples:

• May tao sa labas. = There is a person outside.
• May tubig pa. = There is still water.
• May kotse siya. = He/She has a car.

So in this sentence, may introduces existence: trash exists on the floor.

Sa is a location/direction marker. It often means:

• in
• on
• at
• to
• into

The exact English translation depends on context.

Here:

• sa sahig = on the floor

So:

• basura sa sahig = trash on the floor

A few comparisons:

• sa mesa = on the table / at the table
• sa kusina = in the kitchen
• sa bahay = at home / in the house

So sa is a very flexible location marker, and English chooses the most natural preposition when translating it.

Because basura is part of the phrase introduced by may.

After may, nouns usually appear without ang or ang mga in this kind of existential structure:

• may basura = there is trash
• may tao = there is a person
• may problema = there is a problem

So basura does not need ang here.

If you said ang basura, that would mark trash as the topic, which is a different structure.

It can function like a mass noun, similar to English trash or garbage.

So may basura sa sahig can mean:

• there is trash on the floor
• there is some garbage on the floor

Filipino nouns often do not have to show singular vs. plural as clearly as English does. Context usually tells you.

If you want to clearly mark plural with countable nouns, Filipino often uses mga:

• mga libro = books
• mga bata = children

But with basura, using it without mga is completely natural.

Yes. Filipino often does not mark definiteness in exactly the same way English does.

• ang kusina will often be translated as the kitchen
• but the exact English wording depends on context

In this sentence, the kitchen is the most natural translation because it refers to the specific kitchen being discussed.

So while ang is not exactly the same as the, the full phrase ang kusina often corresponds to the kitchen in translation.

It most naturally sounds like a general truth or usual condition.

• Marumi ang kusina kapag may basura sa sahig.
• The kitchen is dirty when there is trash on the floor.

This sounds like a statement about what is generally true.

If you wanted to talk more specifically about a particular moment, context would usually make that clear, for example:

• Marumi ang kusina ngayon dahil may basura sa sahig.
• The kitchen is dirty now because there is trash on the floor.

So the original sentence sounds more like a general observation than a one-time event.

Yes, but the meaning and structure are different.

• Marumi ang kusina. = The kitchen is dirty.
• maruming kusina = a dirty kitchen

In maruming kusina, marumi changes form to maruming because it directly modifies the noun kusina.

This is the adjective + linker + noun pattern:

• maruming kusina = dirty kitchen
• malaking bahay = big house
• magandang araw = beautiful day

So:

• Marumi ang kusina is a full sentence.
• Maruming kusina is a noun phrase, not a complete sentence by itself.