Question

they asked the boy many questions change the voice

Answer 1

Boy was asked many questions by Them.

Answer 2

$\huge{\texbf\red{ANSWER }}}$

__________

$\huge{\texbf\red{ACTIVE VOICE }}}$

They asked the boy many questions

$\huge{\texbf\red{PASSIVE VOICE }}}$

The boy was asked many questions by them

$\huge{\texbf\red{RULES }}}$

1▪ Subject of active voice changes to object

2▪ object of passive voice changes to subject

3▪ Use of third form of verb

4▪ Use of " by"

Helping verb is borrowed from the upcoming tense

In ur question verb is in second form which hows that it is past simple so helping verb for passive voice will be borrowed from upcoming tense that is past continuous tense .

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$\huge{\texbf\red{INSHALLAH IT WILL HELP U }}}$

$\huge{\texbf\red{HAVE A NICE EVENING}}}$