Habitual tense is for ideas that happen regularly, i.e. there's a pattern. For example, brushing ones teeth. You wouldnt say "every morning, I am brushing my teeth", you'd say "every morning, i brush my teeth". In this case, student preparing farms that belong to their schools are activities that happen regularly, spent some time in TZ and seeing students go to school with gardening tools is quite common, at least in the rural areas
How does the sense of this sentence differ from the analogous one with na instead of hu?
hu- is habitual marker while -na- is the present tense and progressive tense aspect marker.
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I asked the question because in this specific sentence I have trouble figuring out the precise situation in which the Swahili sentence would be used. "Students prepare a farm" is obviously a grammatical sentence, but the articles seem uncommon. I can imagine it being used, but in only such narrow environments that I would be surprised if the Swahili sentence has the same strictures.
In other courses in this tense words like "usual" or "usually" are frequently used.... Here I have not seen even once. Most translations should start with ... Usually ...... He cooks for hupika is wrong. It should be... He usually cooks....