Breakdown of Miksi hän ei ole vielä käynyt lähetystössä?
olla
to be
hän
he / she
ei
no / not (negative verb)
vielä
yet / still
Questions & Answers about Miksi hän ei ole vielä käynyt lähetystössä?
Why is 'embassy' in the inessive case (lähetystössä) when visiting implies movement?
This is the core rule for the verb käydä (to visit). Even though you travel to get to a place, käydä demands a static location case. Because an embassy is an enclosed building, it takes the inessive ending -ssä (literally 'in the embassy'). If you were visiting an open area or a person, like a doctor, you would use the adessive ending -llä instead (käydä lääkärillä).
Why are there three words (ei ole käynyt) for 'hasn't visited'?
This is the negative present perfect tense. It combines the third-person negative verb ei, the auxiliary helper word ole, and the past participle form of the main verb käydä, which is käynyt.
Is there a rule for where to put vielä (yet) in this sentence?
Yes. In Finnish compound tenses like the present perfect, short adverbs of time such as vielä (yet), jo (already), or koskaan (ever) are usually tucked right between the auxiliary verb (ole) and the main verb (käynyt).
How is the word lähetystö (embassy) formed?