Tulipofika supermarketi, Rahma alisukuma troli huku mimi nikisoma orodha ya ununuzi.

It breaks down like this:

• tu- = we
• -li- = past tense
• -po- = a relative/time marker that often gives the sense of when
• fika = arrive

So Tulipofika means when we arrived.

This is a very common Swahili pattern for a time clause:

• Nilipofika = when I arrived
• Ulipofika = when you arrived
• Tulipofika = when we arrived

• Tulifika = we arrived
• Tulipofika = when we arrived

So -po- is the important extra piece. It turns the verb into a time expression connected to another action.

Compare:

• Tulifika supermarketi. = We arrived at the supermarket.
• Tulipofika supermarketi, Rahma alisukuma troli... = When we arrived at the supermarket, Rahma pushed the trolley...

Because in Swahili, the subject marker is normally part of the verb even when the subject noun is stated separately.

So in Rahma alisukuma:

• Rahma = the subject noun
• a- = he/she
• -li- = past
• sukuma = push

This is normal Swahili grammar. The verb still carries subject agreement.

So Swahili does not usually work like English Rahma pushed with no extra subject marking on the verb. Instead, it is more like:

• Rahma a-li-sukuma

Here huku means something like while, as, or at the same time that.

In this sentence, it links two actions happening together:

• Rahma was pushing the trolley
• I was reading the shopping list

So huku mimi nikisoma... means while I was reading...

This is different from other uses of huku, where it can refer to direction or area, such as this side or over here. In this sentence, it is a connector showing simultaneous action.

Because nikisoma fits the idea of an action happening at the same time as another action.

• ni-ki-soma = while I am/was reading
• ni-li-soma = I read / I was reading

If you said mimi nilisoma, it would sound more like a separate main event. But mimi nikisoma works naturally with huku to show a background or simultaneous action.

So:

• huku mimi nikisoma = while I was reading
• huku mimi nilisoma would not be the normal choice here

Not exactly. In many cases, -ki- shows an action happening during another action, or sometimes a repeated/conditional sense depending on context.

Here it does not mean simple present I am reading in isolation. Because the whole sentence is in a past setting, nikisoma is understood as:

• while I was reading
• as I was reading

So the time comes from the whole sentence, not only from -ki- by itself.

Yes, huku nikisoma would also be possible.

The pronoun mimi is added for clarity, contrast, or emphasis. It helps set up the contrast between the two people:

• Rahma did one thing
• mimi did another thing

So huku mimi nikisoma feels a bit like:

• while I, meanwhile, was reading

Swahili often leaves subject pronouns out unless they add emphasis or contrast, because the verb already shows the subject.

It literally means something like list of shopping/purchasing.

Breakdown:

• orodha = list
• ya = of, agreeing with the noun class of orodha
• ununuzi = shopping, purchasing, buying

So:

• orodha ya ununuzi = shopping list

The ya is a connector often used in possessive or of constructions. You will see this pattern a lot:

• kitabu cha mwanafunzi = the student’s book / book of the student
• mlango wa nyumba = door of the house
• orodha ya ununuzi = shopping list

It comes from the verb nunua, which means to buy.

Swahili often forms nouns from verbs. So:

• nunua = buy
• ununuzi = buying, purchasing, shopping

That is why orodha ya ununuzi is literally a list of buying/shopping.

Because Swahili often adapts borrowed words to fit Swahili spelling and sound patterns. Many borrowed words end in a vowel in Swahili writing.

So:

• supermarket becomes supermarketi
• trolley becomes troli

These are loanwords, but they behave like normal Swahili words in a sentence.

It is a borrowed word, but it is completely normal in everyday Swahili.

Many modern objects are referred to with loanwords, especially in urban contexts. So troli is a natural word to use for a shopping trolley/cart.

Learners should get used to this: Swahili contains many borrowed words, especially for technology, transport, shopping, and modern institutions.

Because Swahili usually does not use articles the way English does.

So a noun like troli can mean:

• a trolley
• the trolley

and supermarketi can mean:

• a supermarket
• the supermarket

The exact meaning depends on context. In this sentence, the context makes it clear which meaning is intended.

Not good English, but it helps show the structure.

A more literal grammar-based gloss would be:

• When we arrived at the supermarket, Rahma pushed the trolley, while I was reading the shopping list.

The important thing for a learner is that Swahili often uses special verb forms like -po- and -ki- where English might use separate words such as when and while.