In Italian, "when" can be translated in a few ways, depending on the context:
* Quando: This is the most common translation for "when" in most cases.
* Se: This is used when "when" implies a condition or a possibility.
* Nel momento in cui: This is a more formal way to say "when" and is used when you want to emphasize a specific moment in time.
For example:
* When I see you, I'll tell you the news. (Quando ti vedo, ti dirò la notizia.)
* When you are ready, we can leave. (Quando sei pronto, possiamo partire.)
* When the sun rises, the birds start singing. (Nel momento in cui il sole sorge, gli uccelli iniziano a cantare.)
You can also use other phrases like: all'ora in cui (at the time when), al momento in cui (at the moment when), non appena (as soon as).
It's important to consider the context of the sentence to choose the correct Italian translation for "when".