Question

Change the sentence into past perfect ( interrogative- negative). We are working on this project very hard. *

Answer 1

Answer:

1/ We had worked on this project.

past perfect form

2/ Had we worked on this project ?

Interrogative form

3/ We had not worked on this project.

Negative from

Explanation:

Always use the Had + Main verb (past participle form )

in Past perfect tense. If you turn into Interrogative so place ( Had + subject + Main verb in past participle form )