I am a foreign learner of German.
Is there a difference beyond one of purely grammatical nature between coordinating, subordinating and adverbial conjunctions? If I have understood correctly, they are all connectors used to link sentences that would otherwise be separated. However, from what I've seen, there isn't anything necessarily intrinsic to each of these elements that would make one assume they belong to different morphological categories. Do the differences between them extend to simply the word order required by each of them in their respective applications? Or are they part of individual semantic fields I haven't been able to notice? In other words, is there a logical reasoning behind the inversions they produce, or are their effects upon sentence structure the result of spontaneous evolution over the course of history?
Thanks in advance!