Tolong masuk ke rumah dahulu supaya tidak kehujanan.

In this sentence, tolong makes the sentence sound like a polite request: please.

So Tolong masuk ke rumah dahulu means something like Please go into the house first.

A useful thing to know is that tolong can also literally mean help, depending on context. But before a verb, it often works like please:

• Tolong duduk. = Please sit.
• Tolong tunggu. = Please wait.

So here, it is not talking about helping someone enter the house. It is simply making the request polite.

Malay often leaves out the subject when it is already obvious from context.

In English, you usually need to say you:

• Please go into the house first...

In Malay, that is often unnecessary if the speaker is clearly talking to someone in front of them. So:

• Tolong masuk ke rumah dahulu...

already implies you.

If you added a subject like awak, anda, or kamu, it could still be grammatical, but it is often not needed.

Masuk means enter / go in / go inside.

Ke rumah means to the house / into the house.

So masuk ke rumah means go into the house or enter the house.

In everyday English, we normally say go into the house, so that is often the most natural translation.

Ke is a preposition that often means to or shows direction toward a place.

So:

• ke rumah = to the house / home
• ke sekolah = to school
• ke luar = outside

In masuk ke rumah, ke marks the direction of movement: going into the house.

In casual speech, some speakers may omit ke in certain contexts, but masuk ke rumah is clear and standard.

Dahulu and dulu usually mean the same thing here: first or for now.

So:

• masuk ke rumah dahulu
• masuk ke rumah dulu

both mean go into the house first.

The difference is mainly style:

• dahulu = a bit more formal or careful
• dulu = more common in everyday speech

So the sentence sounds slightly more polite or formal because it uses dahulu.

Supaya means so that, in order that, or sometimes just so.

It introduces the purpose or intended result of the first action.

So in this sentence:

• Tolong masuk ke rumah dahulu supaya tidak kehujanan.

the second part explains why the person should go inside first:

• so that [they] won’t get caught in the rain

Other examples:

• Belajar rajin-rajin supaya lulus. = Study hard so that you pass.
• Cepat pergi supaya tidak terlambat. = Go quickly so that you aren’t late.

Malay has different common negators, and they are used in different situations.

• tidak is used to negate verbs and adjectives
• bukan is used to negate nouns or make a correction/contrast

Here, kehujanan behaves like a verb/state, so tidak is correct:

• tidak kehujanan = not get caught in the rain

You would not normally say bukan kehujanan here.

A quick comparison:

• Saya tidak faham. = I do not understand.
• Itu bukan rumah saya. = That is not my house.

Kehujanan means to get rained on, to be caught in the rain, or to get wet from the rain.

It comes from the root hujan = rain.

So:

• hujan = rain
• kehujanan = be affected by rain / get caught in the rain

In this sentence, tidak kehujanan means so that [you] won’t get caught in the rain.

It does not just mean that rain exists. It means the person is personally affected by it.

Kehujanan uses the pattern ke-...-an with the root hujan.

So:

• hujan = rain
• ke + hujan + an = kehujanan

This ke-...-an pattern often gives the idea of experiencing something, often something accidental or unpleasant.

For example, depending on context, this pattern can describe someone being affected by something rather than doing it intentionally.

So kehujanan is not to rain; it is more like to end up getting rained on.

That is why tidak kehujanan is such a natural phrase here.

Not exactly in the same way as an English passive.

It is better to think of kehujanan as describing a state or experience: being affected by rain or getting caught in the rain.

So although English may translate it with a passive-like expression such as get rained on, the Malay form is not just a simple passive equivalent. It is a special derived form that shows the person experiences the effect of the rain.

Yes. Agar and supaya are very similar and both can mean so that.

So you could say:

• Tolong masuk ke rumah dahulu agar tidak kehujanan.

This would mean the same thing.

Very generally:

• supaya is very common in everyday use
• agar may sound a bit more formal or literary in some contexts

But both are correct.

It sounds polite and natural.

The politeness comes mainly from:

• tolong = please
• dahulu = slightly more polite/formal than dulu

So the sentence is suitable when speaking respectfully but still naturally. It is not extremely formal, but it is more polished than a very casual version.

A more casual version might be:

• Masuk rumah dulu supaya tak kehujanan.

That sounds more conversational, but less polite and less formal.

That is a very normal Malay sentence pattern.

First comes the request or action:

• Tolong masuk ke rumah dahulu

Then comes the purpose/reason:

• supaya tidak kehujanan

So the structure is basically:

• Please do X first so that Y does not happen.

This order is natural and common in both Malay and English.

Yes, in everyday spoken Malay, tidak is very often shortened to tak.

So:

• supaya tidak kehujanan
• supaya tak kehujanan

mean the same thing.

The difference is style:

• tidak = more standard, careful, written
• tak = more casual, spoken

So the original sentence sounds more polished because it uses tidak.

Yes, a Malay speaker could definitely say this.

The original sentence is natural and polite, but slightly neat or careful in style because of:

• dahulu instead of dulu
• tidak instead of tak

A more everyday spoken version might be:

• Tolong masuk rumah dulu supaya tak kehujanan.
• Masuklah dulu supaya tak kehujanan.

So the original is not unnatural at all. It just sounds a little more formal or considerate than casual speech.