Question

They are doing an important work(voice change)

Answer 1

An important work is being done by them .

Answer 2

Hola

Here is your answer

Active Voice - The action is done by the subject in the sentence. The subject is at first then verb followed by object.

Passive voice - The action is underdone by the subject. The object is first then verb followed by subject.

Question - They are doing an important work.

Passive voice - An important work is being done by them.

Here the subject is - They

Verb - Doing

Object - Work

Hope it helps!