Begitu troli saya penuh, saya menuju kasir dan mengecek daftar belanja sekali lagi.

Here begitu means once or as soon as.

So:

• Begitu troli saya penuh = Once my cart was full / As soon as my cart was full

It introduces a time clause. In this sentence, it shows that the next action happened immediately after the cart became full.

A close comparison:

• begitu = once / as soon as
• setelah = after

So begitu often feels a bit more immediate than setelah.

Indonesian usually does not need a verb like to be in sentences like this.

So:

• troli saya penuh literally = my cart full
• natural English = my cart was full

In Indonesian, adjectives can directly describe the subject without adding is/was/are/were.

More examples:

• Saya lapar = I am hungry
• Rumah itu besar = That house is big
• Tokonya tutup = The shop is closed

So troli saya penuh is completely normal Indonesian.

Penuh is an adjective meaning full.

In troli saya penuh, it describes the condition of the cart.

• troli = cart/trolley
• saya = my
• penuh = full

So the phrase means my cart was full or my cart became full, depending on context.

Because the two saya do two different jobs:

1. troli saya = my cart
   Here saya shows possession.

2. saya menuju kasir... = I headed to the cashier...
   Here saya is the subject I.

So even though it is the same word, its function changes depending on position:

• after a noun: often my
• as the subject: I

Because menuju already means to head toward / to go toward, so it can take its destination directly.

• menuju kasir = head to the cashier
• pergi ke kasir = go to the cashier

Both are possible, but they are built differently:

• menuju + destination
• pergi ke + destination

So menuju kasir is normal and does not need ke.

Both can mean go to the cashier, but menuju often sounds a little more directed or slightly more formal.

• menuju kasir = heading toward the cashier
• pergi ke kasir = going to the cashier

In everyday conversation, pergi ke is often more common and straightforward.
Menuju is also common, but can feel a bit more like proceed toward or head for.

Kasir means cashier or sometimes checkout counter, depending on context.

In a shopping sentence like this, menuju kasir usually means the person is going to the place where payment happens.

So in English, it could be understood as:

• I headed to the cashier
• I headed to the checkout

This is because of how the meN- prefix works.

The base word is:

• cek = check

When meN- is added to many one-syllable roots, Indonesian often uses menge-.

So:

• cek → mengecek

That is why mengecek is the correct form here.

This verb means to check.

Cek is a loanword, and mengecek is a very common Indonesian verb built from it.

It is widely used in everyday language and is perfectly natural.
A more formal or more traditionally Indonesian alternative is:

• memeriksa = to inspect/check

So:

• mengecek daftar belanja = everyday, natural
• memeriksa daftar belanja = a bit more formal

Literally:

• daftar = list
• belanja = shopping

So daftar belanja literally means shopping list.

This is a common noun + noun combination in Indonesian, where the second noun describes the type or function of the first.

Similar patterns:

• daftar nama = name list
• jam tangan = wristwatch
• tas sekolah = school bag

Sekali lagi means once again, one more time, or again.

So:

• mengecek daftar belanja sekali lagi = check the shopping list one more time

It emphasizes repetition: the speaker had probably checked it before and is now checking it again.

The comma separates the opening time clause from the main clause.

Structure:

• Begitu troli saya penuh, = time clause
• saya menuju kasir dan mengecek daftar belanja sekali lagi. = main clause

This is similar to English:

• Once my cart was full, I headed to the cashier...

The comma helps show where the first clause ends.

Yes. Indonesian allows that.

You could also say:

• Saya menuju kasir dan mengecek daftar belanja sekali lagi begitu troli saya penuh.

That still makes sense, but the original version sounds more natural because it sets the time first:

• Begitu troli saya penuh, ...

This is a very common way to organize events in Indonesian.

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

So:

• menuju
• mengecek

do not themselves mean specifically went or checked.

The past meaning comes from the context and from the sequence of events in the sentence.
In English, we translate it in the past because that is what fits the situation.

Not exactly with the same nuance.

• begitu = once / as soon as
• ketika = when

If you use ketika, the sentence becomes more like a general time relationship:

• Ketika troli saya penuh, saya menuju kasir... = When my cart was full, I headed to the cashier...

That is understandable, but begitu better expresses immediate next action, which fits this sentence well.