Just FYI for anyone learning English...This sentence is CORRECT in English, but it would never be said that way! It would just never be put in the passive context. We would say, Rashidi bought some clothes. So, I'm wondering...is the passive tense more common in Kiswahili than in English?
Yes it is, I see the passive voice a lot in the Swahili texts I try to read. Btw, Swedish (my second language) also has passive voice and it is also used very frequently. My guess is that languages that have a passive voice use it a lot because it provides a concise way of expressing something that sounds a bit awkward in languages without it. (In Swedish one just adds an 's' at the end of the verb).