Semalam, saya nampak orang cuba curi basikal saya di luar rumah.

Semalam means yesterday, and Malay often puts a time expression at the beginning of the sentence to set the scene.

So:

Semalam, saya nampak orang cuba curi basikal saya di luar rumah.
= Yesterday, I saw someone trying to steal my bicycle outside the house.

This is very natural in Malay. You could also say:

Saya nampak orang cuba curi basikal saya semalam.

That is also grammatical, but putting semalam first gives the time extra emphasis.

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

In English, we distinguish:

• see
• saw
• have seen

In Malay, the verb itself usually stays the same. Time is often shown by context or by time words such as:

• semalam = yesterday
• tadi = earlier / just now
• esok = tomorrow
• sekarang = now

So nampak does not mean specifically see or saw by itself. In this sentence, because of semalam, we understand it as past: saw.

Yes, here nampak means saw or could see.

In everyday Malay, nampak is very common and natural. It can suggest seeing something with your eyes, often in a direct, immediate way.

Some related words are:

• nampak = see / notice / be visible
• lihat = see / look
• melihat = a more formal form of lihat

In casual spoken Malay, saya nampak is extremely normal. A more formal version of the sentence might use melihat instead.

Yes, orang literally means person/people, but in context it can also mean someone.

In this sentence:

saya nampak orang cuba curi basikal saya
literally: I saw person/people try steal my bicycle

Natural English: I saw someone trying to steal my bicycle.

Malay often leaves things less specifically marked than English. If the context makes it clear that it was one unidentified person, orang can work like someone.

A more explicit version would be:

• seseorang = someone

So you could also say:

Saya nampak seseorang cuba curi basikal saya.

That sounds a bit more explicit and slightly more formal.

Malay does not use to before verbs the way English does.

In English:

• try to steal

In Malay:

• cuba curi

This is very normal. One verb can be followed directly by another.

Other examples:

• mahu makan = want to eat
• boleh pergi = can go
• suka membaca = like reading / like to read

So cuba curi is simply try steal, which in natural English becomes try to steal.

Both are possible, but they differ in style.

• curi = steal, more casual / base form in everyday speech
• mencuri = to steal, more formal or more standard written style

So:

• orang cuba curi basikal saya = very natural spoken Malay
• orang cuba mencuri basikal saya = more formal, more textbook-like

The sentence you were given sounds very natural in conversation.

In Malay, possessors usually come after the noun.

So:

• basikal saya = my bicycle
• rumah saya = my house
• buku dia = his/her book

This is the normal Malay word order:

noun + possessor

So basikal saya literally follows the pattern bicycle my, but in English we translate it as my bicycle.

di luar rumah means outside the house/home.

Breakdown:

• di = at / in / on, used for location
• luar = outside
• rumah = house / home

So:

• di luar = outside
• di luar rumah = outside the house / outside the home

This phrase describes the location where the event happened.

Good question. di luar rumah literally means outside the house/home, and in many contexts Malay leaves possession unstated if it is obvious.

Since the sentence already says basikal saya and the speaker is telling a personal story, listeners may naturally assume it means outside the speaker’s house.

If you want to be completely explicit, you can say:

di luar rumah saya = outside my house

So both are possible:

• di luar rumah = outside the house / outside home
• di luar rumah saya = outside my house

The shorter version can sound more natural when the context is already clear.

Malay generally does not use articles like English a, an, and the.

So:

• orang can mean a person, the person, or someone, depending on context
• rumah can mean a house, the house, or home
• basikal saya = my bicycle without needing any article

Malay relies heavily on context to show whether something is specific or general.

It can mean either, depending on context.

• rumah = house / home

In di luar rumah, English could translate it as:

• outside the house
• outside the home
• sometimes even outside my house, if context supports that

Malay often uses rumah in places where English might choose either house or home.

Malay does have words such as sedang to show an action in progress, but they are often omitted when the meaning is already clear.

Here, orang cuba curi basikal saya already clearly suggests an ongoing event in context: the speaker saw someone in the act of trying to steal the bicycle.

A fuller version could be:

Semalam, saya nampak orang sedang cuba curi basikal saya di luar rumah.

That would also be fine, but it is not necessary. Everyday Malay often leaves out markers like sedang unless they add useful emphasis or clarity.

It is fairly natural, everyday Malay, with a slightly spoken feel.

What makes it sound more conversational is especially:

• nampak instead of melihat
• curi instead of mencuri

A more formal version might be:

Semalam, saya melihat seseorang cuba mencuri basikal saya di luar rumah saya.

Both mean the same thing, but the original sentence sounds more like something a person would actually say in casual conversation.