Here is a sentence in English using 'when' to express an action that will have been completed in the future before another action:
When I have finished my work, I will watch TV.
When I finish my work, I will watch TV.
Notice how the verb after 'when' is in the Present Perfect or Present tense.
Now look at these sentences using "quand" in a similar context:
Notice how in French you use the le Futur Antérieur after quand in order to show that this action will come before the other one.
Note that this rule also applies to the conjunctions lorsque (when), après que (after) and une fois que (once):
Lorsque j'aurai fini mon travail, je regarderai la télé.When I have finished my work, I'll watch TV.
See also previous lesson Using Le Futur after "quand" and "pendant que" instead of Le Présent
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Examples and resources
Une fois qu'elle sera arrivée chez nous, la fête commencera.Once she arrives at our place, the party will start.
Nous irons au cinéma quand nous aurons rangé notre chambre.We'll go to the cinema when we have tidied our room.
Lorsque j'aurai fini mon travail, je regarderai la télé.When I have finished my work, I'll watch TV.
