Question

When have you done all this? voice change ​

Answer 1

First of all, forget the word why and then make this interrogative into affirmative sentence. The sentence becomes:

You have done this.

Now, it is simple to make passive of it.

This has been done by you.

Your sentence was interrogative but this is a passive of affirmative sentence. For making it passive of interrogative sentence, change the positions of subject and verb. Now, the passive becomes:

Has this been done by you?

But in the starting, we forgot the question word why. Now, this time put why in the starting to make the complete passive of the given sentence.

Answer 2

$\huge\mathfrak\red{ANSWER:}$

• when has this all been done by you?