Question

our task had been completed before sunset...what is its passive?​

Answer 1

Hey mate
Here is your answer :--

Mate it is in passive we have to change it into active

Active :-
We had completed our task before sunset

Hope this help you mate and if you have any more queries just let me know in the comments

Answer 2

Question : Our task had been completed before sunset .
( This sentence is already in passive form )

It's active form will be :
We had completed our task before sunset

Some significant events that take place here :

》The Subject in the question " Our task" has been turned into object

》 In the question "had been" is used before "completed" identifyng that it is in passive so it's answer in active will be written in "Past perfect tense"

》Here in the question object is not reflected which is "we" which we came to know by the word "our task" . So in active form "we" is taken as subject.

HOPE IT WOULD HELP