Swahili verbs are built exactly like Lego blocks.

You attach small word parts together to create a single word that acts as a complete sentence.

These small parts are called affixes or infixes.

Subject infixes tell you exactly who is doing the action.

Object infixes tell you who is receiving the action.

Understanding this verb structure is essential for speaking Swahili properly.

I’ll break down exactly how to use these infixes with clear examples below.

The Swahili verb structure explained

English uses separate words to build a sentence.

You say “I love you” using three completely different words.

Swahili combines all of these elements into a single word.

The standard formula for a Swahili verb is very consistent.

You simply combine the Subject + Tense + Object + Verb Root.

The subject infix always comes first to show who is acting.

The tense marker comes next to show when the action happens.

The object infix comes right before the main verb root to show who receives the action.

The verb root is the core action word.

Swahili subject infixes

The subject infix is the very first building block of your Swahili verb.

It tells the listener who is performing the action.

Swahili has different noun classes, but we’ll focus on the M/WA class first.

The M/WA class is used exclusively for human beings.

Here are the subject infixes you need to memorize for people.

We can attach these subject infixes to the present tense marker -na- and the verb root -soma (to read).

Swahili object infixes

The object infix shows who the action is happening to.

It’s placed immediately before the main verb root.

You don’t always need an object infix if the verb doesn’t act on a person.

However, if you’re doing something to someone, you must include it.

Here are the object infixes for human beings.

Notice that the object infix for “you all” and “them” is the exact same.

You’ll know which one is meant based entirely on the context of the conversation.

Putting subject and object infixes together

Now we can combine all of our Lego blocks to make full sentences.

Let’s use the verb root -ona (to see) and the past tense marker -li-.

We’ll build the sentence “He saw me” step by step.

The subject is “He” (a-).

The tense is past (-li-).

The object is “me” (-ni-).

The verb root is “see” (-ona).

Here are a few more examples using different tenses and infixes.

Let’s use the verb root -penda (to love) in the present tense (-na-).

Let’s use the verb root -saidia (to help) in the future tense (-ta-).

Let’s use the verb root -ambia (to tell) in the past tense (-li-).

Notice that the object infix -m- changed to -mw- because the verb root -ambia starts with a vowel.

Regional variations to keep in mind

Swahili is spoken across a massive area of East Africa.

Because of this, you’ll hear slight differences depending on where you travel.

In coastal Tanzania and Zanzibar, speakers use these infixes with strict grammatical perfection.

If you skip an object infix in Zanzibar, your Swahili will sound broken to the locals.

In inland Kenya, especially in Nairobi, informal Swahili is much more relaxed.

Kenyan speakers sometimes drop the object infixes entirely in casual speech.

They might say aliona mimi instead of the grammatically correct aliniona.

While you’ll be understood if you speak this way, it’s a bad habit to form.

You should always practice using the correct infixes from the very beginning of your studies.

It’s much easier to learn the proper grammar now than to unlearn bad habits later.