Questions & Answers about Jeg bliver nervøs, hvis cykelkæden hopper af på vejen.
At være (jeg er nervøs) describes a state you are in (you’re nervous already).
At blive (jeg bliver nervøs) means to become / get (you move into that state). In this sentence it’s about the reaction that happens if the condition occurs.
Hvis introduces a condition (something that may or may not happen): if …
Når is typically used for something expected/regular or viewed as certain in the future: when …
So hvis cykelkæden hopper af frames it as a possibility, not a sure event.
In Danish it’s standard to put a comma between a main clause and a subordinate clause:
- Main clause: Jeg bliver nervøs
- Subordinate clause: hvis cykelkæden hopper af på vejen
So the comma marks the boundary before the hvis-clause.