futur antérieur after quand

Question

I used "une antilope aura chasée par un lion" withe the correct answer being "sera chassée"  I thought it was always futur anterior after quand?  I can see there are examples in the lesson but I am not clear when each one is used.

Accepted Answer

Hi Kay,
I couldn't find this particular example in this lesson but you could say -
une antilope aura été chassée par un lion = an antelope will have been hunted by a lion 
or 
une antilope sera chassée par un lion = an antelope will be hunted by a lion
Hope this helps!

Answer

Note that the passive voice in that sentence always requires être in the correct tense and not avoir. Aura (chassé) is not a form of être. Aura été (chassée), however, is le futur antérieur of être.