Weather sentences need a det that stands for nobody: det regner, det snør, det er overskyet. Hvis opens a subordinate clause, and when that clause comes first the main verb follows straight after the comma, keeping the verb in second position overall.
Examples
- Det har regnet siden i morges.
- It has been raining since this morning.
- Hvis det regner i morgen, blir vi hjemme.
- If it rains tomorrow, we will stay at home.
- Jeg tar med paraply hvis det er overskyet.
- I will bring an umbrella if it is cloudy.
The mistake to avoid
The det cannot be dropped: det regner, never just "regner".
Where this fits in
Planer og avtaler, Norwegian A2: Foreslå noe, avtale og flytte en time, og snakke om været som endrer planene.