Learn Turkish: Geçici çalışmalarımız bitmiş bulunmaktadır. - Our temporary works have definitively finished.

The construction -mIş bulunmak creates a highly formal perfect aspect. It emphasizes that the action is completely finished and that we are currently existing in that resultant state (literally, "finds itself finished"). While bitmiştir is also formal, bitmiş bulunmaktadır carries the heavy, official tone of a public announcement or a corporate notice.

Why is bulunmak conjugated with the -mEktEdIr suffix here instead of just using bulunuyor?

The suffix -mEktEdIr (made from the infinitive -mEk, the locative -tE, and the factual -dIr) is the formal, written equivalent of the present continuous tense (-Iyor). Because the -mIş bulunmak structure is already reserved for official or bureaucratic statements, it pairs naturally with -mEktEdIr to maintain that high level of formality.

Since the subject is çalışmalarımız (our works), why doesn't the verb have a plural suffix like bulunmaktadırlar?

This is a great time for a quick refresher: in Turkish, when a plural subject is non-human (such as objects, animals, or abstract concepts like "works"), the verb must remain singular. You generally only attach plural verb endings to plural human subjects.

How is the word geçici (temporary) formed?