Miradi miwili inaendelea sambamba.

Mradi is the singular noun, and miradi is its plural. This noun belongs to the m-/mi- noun class pair in Swahili:

• singular: mradi = project
• plural: miradi = projects

A lot of Swahili grammar depends on noun classes, so once the noun changes from mradi to miradi, other words in the sentence may also change to match it.

In Swahili, numbers from one to five usually agree with the noun class of the noun they describe.

The word for two is based on the stem -wili. The form you use depends on the noun class:

• miradi miwili = two projects
• vitabu viwili = two books
• ndizi mbili = two bananas

So miwili is correct because miradi is in the mi- plural class. An English speaker often expects one fixed word for two, but in Swahili the form changes to match the noun.

Because Swahili verbs agree with noun class, not just with the simple idea of singular vs. plural.

Miradi is a plural noun, but it belongs to noun class 4, and class 4 takes the subject prefix i- on the verb.

So:

• miradi → class 4 plural
• class 4 subject prefix → i-
• therefore: i-na-endelea

This can feel strange to English speakers, because English would just use they for all plural nouns. In Swahili, different plural noun classes can take different verb prefixes.

Inaendelea can be broken down like this:

• i- = subject prefix for the noun class of miradi
• -na- = present tense marker
• -endelea = continue / go on / proceed

So inaendelea means something like:

• is continuing
• are continuing
• continues / continue

depending on context.

Swahili present tense often covers both the English simple present and present progressive. So the form can express either a general ongoing situation or something happening now.

Here sambamba means in parallel, side by side, or alongside each other.

In this sentence it works adverbially: it tells you how the projects are continuing. It does not change form to match the noun class.

So:

• Miradi miwili inaendelea sambamba = the two projects are continuing in parallel

You may also see sambamba in other expressions, such as kwenda sambamba na, which can mean to go hand in hand with or to be in line with.

Swahili usually does not use articles like a, an, or the the way English does. Whether something is the projects or just projects is often understood from context.

Also, Swahili does not need a separate word like are here, because the verb already contains the necessary information:

• i- shows agreement with the subject
• -na- shows present tense
• -endelea gives the main action

So one word, inaendelea, carries meaning that English would spread across several words.

The singular would be:

Mradi mmoja unaendelea sambamba.

Here several things change:

• mradi = project instead of miradi
• mmoja = one, agreeing with the singular noun class
• u-na-endelea instead of i-na-endelea, because singular mradi takes the subject prefix u-

This is a good example of how Swahili agreement works across the whole sentence, not just on the noun itself.

The given order is the most natural and safest for a learner:

Miradi miwili inaendelea sambamba.

That order is:

• noun
• number/adjective
• verb
• adverb-like word

Swahili does allow some flexibility for emphasis, but for normal, clear sentences, keeping sambamba after the verb is the best choice. As a learner, it is a good pattern to copy.