Learn Italian: Volevo tritare la cipolla, che mi serve per la zuppa. - I wanted to chop the onion, because I need it for the soup.

Volevo tritare la cipolla, che mi serve per la zuppa.

I wanted to chop the onion, because I need it for the soup.

Breakdown of Volevo tritare la cipolla, che mi serve per la zuppa.

per

for / in order to / because of

Questions & Answers about Volevo tritare la cipolla, che mi serve per la zuppa.

Why is che translated as "because" instead of "that" or "which"?

This is an example of the informal causal che. In spoken and informal Italian, che is frequently used as a shortcut for perché (because) or poiché (since) to explain or justify the statement that just came before it.

Could che in this sentence also be translated as "which" (the onion, which I need)?

Yes, structurally it absolutely could! In writing, the comma before che often hints at a pause that shifts the meaning toward "because" (explaining why you wanted to chop it). In spoken Italian, the speaker's tone makes the intent clear. Because "which I need" and "because I need it" mean practically the same thing here, this natural overlap is exactly how the causal che evolved in everyday Italian.

Why does "I need" translate to mi serve? Could I use avere bisogno di here?

You could definitely say perché ho bisogno della cipolla (because I need the onion) or di cui ho bisogno (which I need). However, servire is incredibly common for talking about needing items, tools, or ingredients. It works completely backwards compared to English: the thing you need is the subject, and it "is useful or necessary" to you. So mi serve literally means "it is necessary to me".

Why use the imperfect tense volevo instead of the passato prossimo ho voluto?