How many friends will you have spoken to by this time next week?
Which TV shows will you have watched by this time tomorrow?
Where will you have lived by the time you retire?
All these questions ask what 'will have' happened by some future time. Use the future perfect tense to talks about the past in the future.
Subject + will have + past participle + object
A lesson about the Future Continuous and Future Perfect Verb Tenses:
Look at the itinerary of an organised trip in Cape Town centre this weekend.
We use the simple past tense for actions that began and finished in the past. We do not have to say exactly when. The important thing is that it happened and is not happening now.
'I saw it'
The past participle is used with the following tenses: