Mun yi karatu tukuru domin jarabawa.

Mun means we here, but more specifically it is the 1st person plural completive subject marker.

So:

• mun yi = we did / we have done
• in this sentence, it gives we studied

Mu is used in other constructions, not this one. For example, mu can appear in forms like let us... or other non-completive uses.

So Mun yi karatu is correct for We studied.

In Hausa, many actions are expressed with yi + a verbal noun.

Here:

• yi = do
• karatu = study / studying / learning as a noun-like form

So yi karatu literally looks like do study, but idiomatically it means study.

This is very common in Hausa. It is a normal pattern, not awkward or overly literal.

It is best understood as a verbal noun here.

That means it behaves like a noun in form, but in a phrase like yi karatu, the whole expression functions like a verb:

• karatu on its own can refer to study, learning, education, or sometimes reading, depending on context
• yi karatu = to study

So in this sentence, you should learn yi karatu as a unit meaning study.

Tukuru means something like:

• hard
• intensely
• diligently
• seriously

So karatu tukuru means hard study or studying hard.

It adds the idea that the studying was not casual; it was strong, serious effort.

Here domin means for, in the sense of for the sake of or in preparation for.

So:

• domin jarabawa = for the exam

Depending on context, domin can also have meanings like:

• because of
• for the purpose of
• in order to

But in this sentence, the most natural meaning is for the exam.

Hausa does not use articles the same way English does.

So jarabawa can mean:

• an exam
• the exam
• sometimes just exam/examination in a general sense

The exact meaning depends on context.

In this sentence, English will often translate it as the exam, because the situation usually makes it clear which exam is meant.

Not exactly tense in the English sense. Hausa is often described in terms of aspect.

Mun yi is a completive form. It usually means the action is viewed as completed.

So depending on context, it can be translated as:

• we studied
• we have studied

In this sentence, English normally uses we studied hard for the exam, but we have studied hard for the exam could also be possible in the right context.

Usually, no—not if you mean studied in the general sense.

karanta usually means to read.

So:

• Mun karanta littafi = We read a book
• Mun yi karatu = We studied

That is an important difference.
If you want to express studying, yi karatu is the natural choice.

Yes. The sentence is arranged in a very normal Hausa way:

• Mun = subject marker
• yi = verbal element
• karatu = the action
• tukuru = adverb-like intensifier
• domin jarabawa = purpose/reason phrase

So the full order is:

Mun yi karatu tukuru domin jarabawa.

This is the natural way to say it.
If you move tukuru around too much, the sentence may sound less natural or become unclear.

A simple rough guide is:

Mun yi karatu tukuru domin jarabawa
moon yee ka-ra-too too-koo-roo do-min ja-ra-ba-wa

A few useful notes:

• u is usually like oo in food
• j sounds like English j in jam
• each vowel is pronounced clearly
• Hausa spelling is fairly regular

Also, Hausa has tone, but tone is usually not written in normal spelling. So learners often first learn the words without tone marks and improve pronunciation through listening.