Di pasar raya, saya beli lampin dan tisu basah untuk bayi itu.

Malay often allows a place phrase to come first if you want to set the scene.

• Di pasar raya = at/in the supermarket
• saya beli lampin dan tisu basah untuk bayi itu = I bought diapers and wet wipes for that baby

Putting Di pasar raya first is similar to saying in English:

• At the supermarket, I bought...

You could also say:

• Saya beli lampin dan tisu basah untuk bayi itu di pasar raya.

That version is also correct. The difference is mostly about focus and style, not basic meaning.

No, di and ke are different.

• di = at / in / on a place
• ke = to a place

So:

• Di pasar raya = at the supermarket
• Ke pasar raya = to the supermarket

In this sentence, the speaker is talking about where the buying happened, so di is the correct choice.

Pasar raya is the normal Malay term for supermarket.

Literally:

• pasar = market
• raya = great / large / grand

Together, pasar raya means supermarket.

Many Malay compound expressions are written as two separate words, so this is normal.

Both are possible, but they feel different in style.

• saya beli = common, natural, often conversational or less formal
• saya membeli = more formal, more standard written style

In everyday Malay, it is very common to use the shorter verb without the meN- prefix, especially in speech and informal writing.

So:

• Saya beli lampin... sounds very natural.
• Saya membeli lampin... is also correct, but slightly more formal.

Malay verbs usually do not change form the way English verbs do.

So beli can mean:

• buy
• bought
• will buy

The time is usually understood from:

1. context
2. time words, if present

For example:

• Semalam saya beli lampin. = Yesterday I bought diapers.
• Esok saya beli lampin. = Tomorrow I will buy diapers.

In your sentence, the meaning has already been given, so we understand beli as bought from context.

Malay does not use articles the same way English does. There is no direct equivalent of a/an or the in most cases.

So:

• lampin can mean a diaper, diapers, or the diaper(s) depending on context
• tisu basah can mean a wet wipe, wet wipes, or the wet wipes

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

By itself, lampin does not clearly show singular or plural. It can be either.

In this sentence, English naturally translates it as diapers, but Malay leaves that open unless there is extra information.

If you really want to make plurality clear, Malay can use:

• lampin-lampin = diapers
• a number, such as dua lampin = two diapers

But very often, Malay does not mark plural when the meaning is already obvious.

In Malay, adjectives usually come after the noun.

So:

• tisu = tissue / wipe
• basah = wet

Therefore:

• tisu basah = wet tissue / wet wipe

This is a very common pattern in Malay:

• rumah besar = big house
• kereta merah = red car
• baju baru = new shirt

So tisu basah follows normal Malay word order.

Untuk usually means for.

So:

• untuk bayi itu = for that baby

It shows the purpose or intended recipient of the items.

In this sentence, it tells us that the diapers and wet wipes were bought for the baby.

In Malay, itu usually comes after the noun when it means that or helps make something definite.

So:

• bayi itu = that baby / the baby

This is normal Malay word order:

• rumah itu = that house
• budak itu = that child
• kereta itu = that car

Putting itu after the noun is one of the most basic patterns learners need to get used to.

It can mean either, depending on context.

• that baby if you are pointing out a specific baby
• the baby if both speaker and listener already know which baby is meant

Malay itu often covers both ideas. English has to choose one, but Malay can leave it slightly broader.

Yes, absolutely. That is correct.

This version:

• Saya membeli lampin dan tisu basah untuk bayi itu di pasar raya.

is a bit more formal because of membeli, and it puts the location at the end instead of the beginning.

Compare:

• Di pasar raya, saya beli... = more like At the supermarket, I bought...
• Saya membeli... di pasar raya. = more like I bought... at the supermarket

Both are natural; the difference is mainly style, focus, and formality.

No, but it is the safest and most neutral choice.

Common options include:

• saya = I; polite, standard, widely usable
• aku = I; informal, casual, used with friends or in certain personal styles

So:

• Saya beli... sounds neutral and appropriate in most situations.
• Aku beli... is more casual and should be used carefully depending on who you are speaking to.

For learners, saya is usually the best default choice.