Question

1) I didn't do it (perfect future tense)
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Answer 1

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I will didn't done

Answer 2

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I shall not have done it.

Explanation;

In future perfect tense,

Will/shall+have+verb(2)

is used.

$\purple{Hope\:It\:Helps\:Uh}$:-)

$<marquee>✌Brainliest Please✌</marquee>$