Question

change in passive voice. You will have won a prize by then.

Answer 1

Heyaa..

Question

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You will have won a prize by then.

# Future Perfect tense

# Formation - Will / Shall + Have + Been + V3 form

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Here's the answer..

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A prize will have been won by you by then.

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Hope it helps...

And here CutieBarbie :)

Answer 2

A prize would have been won by you by then.