Keep the event’s perfect auxiliary
A transitive reading event uses haben; arrival uses sein. Werden is the conjugated verb and the perfect auxiliary remains an infinitive. Check the whole group instead of choosing an auxiliary merely because the tense is called future.
Bis Freitag wird Nora den Bericht gelesen haben.
By Friday Nora will have read the report.
A deadline specifies completion, not a start
By Friday views the event as finished by that reference point. It need not identify the exact finishing time and does not guarantee the prediction. A perfect construction with a clear future time phrase can also express future completion in German.
Morgen um diese Zeit habe ich alles erledigt.
By this time tomorrow I will have taken care of everything.
Present evidence can point backwards
If someone is absent now, a Futur II sentence can present a likely earlier departure. It remains an assumption, not verified evidence. Add a time phrase or further context if readers might otherwise understand a future deadline.
Nora ist nicht hier. Sie wird schon gegangen sein.
Nora is not here. She has probably already left.
Practise this pattern
The matching block includes guided questions, a separate mastery check and spaced review. The first 10 blocks and two samples at each higher level are free; other blocks require course access or an eligible seven-day trial. These tasks practise specific grammar patterns and do not certify a complete language level.
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References
Original explanations and examples informed by grammar references. Level placement is an editorial teaching choice.