やがて + [sentence]
Standalone adverb; placed at the beginning of a clause or before the predicate. Literary/formal tone.
やがて is an adverb meaning "before long," "soon," "eventually," or "in the end." It describes something that happens after a certain amount of time has passed, often with a sense of natural progression or inevitability. Unlike もうすぐ (which emphasizes immediacy), やがて carries a literary or somewhat formal tone and suggests that something will come about as a natural course of events.
やがて can describe something that is expected to happen in the near future, with the nuance that it will happen naturally or inevitably.
やがて is also used to describe the final result of a gradual process or a long chain of events, emphasizing that something ultimately came to pass.
やがて often carries a slightly poetic or reflective tone, suggesting that the passage of time leads naturally to a certain outcome. This makes it common in literary writing and narratives.