Questions & Answers about Bankin ya toshe asusun.
Because Hausa normally needs a subject marker / TAM marker between the subject noun and the verb.
So the structure is:
Bankin + ya + toshe + asusun
the bank + it (perfective) + block + the account
A very literal breakdown would be something like:
The bank it blocked the account
That may sound strange in English, but it is normal Hausa grammar.
Here, ya is the 3rd person singular masculine perfective/completive marker.
In this sentence, it points back to Bankin, so it means it rather than he in natural English.
So:
ya toshe = it blocked / it has blocked
Learners often first meet ya as he, but in real Hausa it is also used for masculine singular non-human nouns.
Banki is the basic noun, meaning bank.
Bankin is the definite form, meaning the bank.
That final is a very common Hausa way of marking definiteness with masculine nouns.