Tutafurahi tukifaulu mtihani huu.

Tutafurahi can be divided into:

• tu- = we
• -ta- = future marker, will
• furahi = be happy / rejoice

So Tutafurahi means we will be happy or we will rejoice.

Because tukifaulu is a second verb, and in Swahili each finite verb normally has its own subject marker.

So:

• Tutafurahi = we will be happy
• tukifaulu = if/when we pass

Even though the subject is the same, Swahili still marks it again on the second verb.

The -ki- marker often means if, when, or sometimes while, depending on context.

So:

• tu-ki-faulu
• we-if/when-pass

In this sentence, it gives the idea if we pass or when we pass.

It can mean either, depending on context.

The -ki- form is often used for situations like:

• if we pass
• when we pass

If the speaker is unsure, English may ترجمه it as if.
If the speaker assumes it will happen, English may use when.

So the Swahili form is a little broader than a single English word.

Because Swahili can build the idea of if/when directly into the verb by using -ki-.

So instead of saying a separate word like English if, Swahili often does this:

• tukifaulu = if/when we pass

You can sometimes also use words like kama for if, but here it is not necessary because -ki- already carries that meaning.

Faulu means to pass or to succeed, especially in things like exams.

So:

• kufaulu mtihani = to pass an exam

In this sentence, tukifaulu mtihani huu means if/when we pass this exam.

In Swahili, demonstratives like this usually come after the noun, not before it.

So:

• mtihani huu = this exam

This is the normal word order in Swahili:

• noun first
• demonstrative after it

Because huu has to agree with the noun class of mtihani.

Mtihani is a singular noun in the m-/mi- class, so the correct demonstrative is:

• huu = this for that noun class

That is why you say:

• mtihani huu = this exam

not mtihani hii.

It is functioning as a verb.

Swahili often uses verbs where English might use to be + adjective.

So:

• kufurahi = to be happy / to rejoice
• tutafurahi = we will be happy

Even though English uses happy like an adjective, Swahili expresses the idea with the verb furahi.

You can add sisi, but it is usually only for emphasis.

Since tu- already means we, the sentence is complete without sisi:

• Tutafurahi tukifaulu mtihani huu.

If you want emphasis, you could say:

• Sisi tutafurahi tukifaulu mtihani huu.

That would sound like we will be happy if/when we pass this exam with extra stress on we.

The sentence has two parts:

• Tutafurahi = main clause: we will be happy
• tukifaulu mtihani huu = dependent clause: if/when we pass this exam

So the pattern is roughly:

• main idea
  • condition/situation

A very literal breakdown is:

• Tu-ta-furahi = we-will-be-happy
• tu-ki-faulu = we-if/when-pass
• mtihani huu = this exam

Yes. That is a very natural translation.

Because -ki- can cover both if and when, the best English translation depends on context:

• We’ll be happy if we pass this exam
• We’ll be happy when we pass this exam

Both can match the Swahili sentence.