As a conjunction:
* quand: This is the most common translation for "when" used as a conjunction. It means "when" in the sense of time or a condition. For example:
* When will you come? - Quand viendras-tu ?
* When I was young... - Quand j'étais jeune...
* lorsque: This is a slightly more formal translation for "when" used as a conjunction. It emphasizes a specific moment in time. For example:
* When I saw him, I was shocked. - Lorsque je l'ai vu, j'ai été choqué.
As an adverb:
* quand: This can also be used as an adverb, meaning "at what time." For example:
* When did you arrive? - Quand es-tu arrivé ?
As a relative pronoun:
* où: This translates to "where" in English, but can sometimes be used for "when" to refer to a specific time or place. For example:
* I remember the day when we met. - Je me souviens du jour où nous nous sommes rencontrés.
To get the most accurate translation, please provide the full sentence you're trying to translate.