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.
-> Note how the verb after when is in the Present Perfect or Present tense.
Now look at these sentences using quand in a similar context:
Note how in French you use 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
Lorsqu'elle sera arrivée chez nous, la fête commencera.When she arrives at our place, the party will start.
Quand elle sera arrivée chez nous, la fête commencera.When she's arrived at our place, the party will start.
Une fois qu'elle sera arrivée chez nous, la fête commencera.Once she arrives at our place, the party will start.
