Kucing itu duduk di samping saya, lalu saya mengelus punggungnya sampai dia tertidur.

In Indonesian, itu usually means that, but after a noun it can also work a lot like English the when you are talking about a specific, already identifiable thing.

So kucing itu can mean:

• that cat
• the cat

Indonesian demonstratives normally come after the noun, not before it. So:

• kucing itu = that/the cat
• rumah itu = that/the house

That word order is completely normal in Indonesian.

Literally, it is:

• duduk = sit / be sitting
• di = at / in / on, used here as a preposition
• samping = side
• saya = me / I

So di samping saya literally means at my side, and naturally in English it becomes beside me or next to me.

A helpful point: this di is a separate preposition, not a verb prefix.

Lalu means then, after that, or and then. It links the first action to the next one in sequence.

So the sentence goes like this:

• The cat sat beside me,
• then
• I stroked its back...

It is a very common way to show events happening one after another in a narrative.

The base word is elus, which has the idea of stroking or caressing gently.

When Indonesian forms an active transitive verb, it often adds the prefix meN-. With roots beginning with a vowel, that usually becomes meng-.

So:

• elus → base/root
• mengelus → to stroke, to pet

In this sentence, mengelus is the normal active verb form for I stroked/petted.

It breaks down like this:

• punggung = back
• -nya = his/her/its, or sometimes a general definite marker depending on context

So punggungnya means his back, her back, or its back.

Here, because the sentence is about a cat, the natural meaning is its back.

It refers to the cat.

So:

• saya mengelus punggungnya = I stroked its back

In context, that is the most natural interpretation. If the speaker meant my back, Indonesian would say punggung saya, not punggungnya.

Dia usually means he or she, but Indonesian does not distinguish gender in this pronoun.

Although dia is most commonly used for people, it can also be used for animals, especially when the animal is being treated as an individual, such as a pet or an animal in a story.

So here dia is natural enough as he/she/it, referring back to the cat.

It can mean either. Indonesian pronouns do not normally mark gender the way English does.

So:

• dia = he / she
• sometimes, in context like this, effectively it

You only know the gender if the context makes it clear.

Sampai means until or up to the point where.

So:

• sampai dia tertidur = until he/she/it fell asleep

It shows the endpoint of the action. The speaker kept stroking the cat’s back, and that continued until the cat finally fell asleep.

This is an important difference:

• tidur = to sleep / be sleeping
• tertidur = to fall asleep / to end up asleep

So:

• dia tidur = he/she is sleeping
• dia tertidur = he/she fell asleep

In this sentence, tertidur is used because it describes the change of state: the cat was not asleep at first, then eventually became asleep.

Indonesian verbs do not change form for tense the way English verbs do.

So duduk, mengelus, and tertidur do not become special past-tense forms.

Time is usually understood from:

• context
• time words such as kemarin = yesterday
• sequence markers such as lalu

In this sentence, the sequence of events makes it sound like a past narrative in English, so it is naturally translated with past tense.

Yes. That would make the sentence sound more casual or intimate.

Compare:

• saya = neutral, polite, standard
• aku = more informal, personal

So:

• Kucing itu duduk di samping saya... sounds neutral and natural
• Kucing itu duduk di samping aku... sounds more casual

Both are possible, depending on tone and situation.

Sometimes Indonesian does omit subjects when they are obvious, but in this sentence keeping them is clearer.

• The second saya after lalu is perfectly normal and helps make the new clause clear.
• Dia in sampai dia tertidur is especially useful, because it shows that the cat fell asleep, not the speaker.

If you removed dia, the sentence could become less clear.

The sentence follows a very common Indonesian pattern:

• Kucing itu = subject
• duduk = verb
• di samping saya = place phrase
• lalu = connector
• saya = subject
• mengelus punggungnya = verb + object
• sampai dia tertidur = endpoint/result clause

So overall, it is basically Subject + Verb + other information, which is often similar to English.

One difference to notice is possession:

• punggungnya literally puts the possessor after the noun as a suffix
• so instead of its back as two separate words, Indonesian uses one word: punggungnya