Leo, kuna ofa ya sukari sokoni.

Kuna is an existential word in Swahili. It means there is or there are.

So in Leo, kuna ofa ya sukari sokoni, kuna introduces the existence of something:

• kuna ofa = there is an offer

Unlike English, Swahili does not need a separate there plus is/are structure. Kuna does that job by itself.

It is very common for talking about the presence or existence of something:

• Kuna maji. = There is water.
• Kuna watu wengi. = There are many people.

Both patterns can exist in Swahili, but they are used a little differently.

• kuna ofa = there is an offer
  This focuses on existence: an offer exists / is available.
• ofa iko = the offer is there / is present
  This sounds more like you are referring to a specific offer that has already been introduced.

In your sentence, kuna ofa is the natural choice because the speaker is introducing new information: there is a sugar offer.

Leo means today.

It sets the time for the whole sentence:

• Leo, kuna ofa ya sukari sokoni. = Today, there is a sugar offer at the market.

Putting leo at the beginning is very natural when you want to emphasize the time. You could also place it later in the sentence, but sentence-initial leo is common and clear.

The comma is mainly a writing choice that helps separate the time expression from the rest of the sentence.

• Leo, kuna ofa ya sukari sokoni.
• Leo kuna ofa ya sukari sokoni.

Both are acceptable in practice. The comma just gives a slight pause, similar to English Today, ...

Ofa means offer, deal, or special promotion. It is a loanword, borrowed from English offer.

In everyday modern Swahili, especially in shopping or advertising contexts, ofa is very common. So ofa ya sukari means something like:

• a sugar offer
• a deal on sugar
• a sugar promotion

Ya links the two nouns. It often corresponds to English of or sometimes for/on, depending on context.

So:

• ofa ya sukari literally = offer of sugar
• more natural English = offer on sugar / sugar deal

This is a very common Swahili pattern:

• bei ya mkate = the price of bread
• chupa ya maji = a bottle of water
• dawa ya meno = toothpaste (literally medicine of teeth)

Here, ya connects ofa with sukari.

The connector agrees with the noun that comes before it, not the noun after it.

The head noun here is ofa, and ofa takes the connector ya. That is why you get:

• ofa ya sukari

This is part of Swahili noun-class agreement. Many loanwords like ofa behave like nouns in the N-class, where the possessive/connective form is often ya.

So even though both words are loanwords or non-human nouns, the important thing is that ofa is the main noun, and it calls for ya.

Literally, yes, it is structured like offer of sugar. But in real usage, the intended meaning depends on context.

In a shopping context, ofa ya sukari is normally understood as:

• a deal on sugar
• a sugar promotion
• a discount involving sugar

So the English translation is usually more natural if you do not translate ya too literally.

Sokoni means at the market or in the market.

It comes from:

• soko = market
• -ni = a locative ending

So sokoni is a locative form, meaning a place associated with the market.

Depending on context, it can be translated as:

• at the market
• in the market
• in the marketplace

In this sentence, at the market is often the most natural English translation.

The ending -ni often turns a noun into a location.

Examples:

• nyumba = house → nyumbani = at home / in the house
• shule = school → shuleni = at school
• soko = market → sokoni = at the market

So sokoni tells you where the offer is available.

That is a very natural place for location information in Swahili. The sentence moves like this:

• Leo = time
• kuna ofa ya sukari = what exists
• sokoni = where

So the structure is roughly:

Today, there is a sugar offer at the market.

Swahili word order is somewhat flexible, but this order sounds normal and easy to process.

Sukari is usually treated as a mass noun, like sugar in English. So it does not normally work like a regular count noun with singular/plural contrast.

In this sentence, it simply means sugar as a substance or commodity.

So you do not need to think of it as a sugar or sugars here. It is just:

• sukari = sugar

Yes. Swahili allows some flexibility, especially with time and place expressions.

For example, these are possible:

• Leo, kuna ofa ya sukari sokoni.
• Kuna ofa ya sukari sokoni leo.
• Sokoni, kuna ofa ya sukari leo.

They all express roughly the same basic meaning, but the emphasis changes a little:

• Leo, ... emphasizes today
• Sokoni, ... emphasizes at the market
• ... leo can sound a bit more neutral or conversational

The version you were given is very natural.

It sounds like normal, everyday Swahili, especially in shopping or market contexts.

A few notes:

• ofa is modern and common in ads, shops, and casual speech
• kuna is basic everyday grammar
• sokoni is a standard locative form

So the sentence would fit well in conversation, announcements, or advertising language.