The students will have submitted the forms by Monday. (Passive)

  1. The forms will be submitted by the students by Monday.
  2. The forms would have been submitted by the students by Monday.
  3. The forms will have been submitted by the students by Monday.
  4. The forms will have submitted by the students by Monday.
Answer

C) The forms will have been submitted by the students by Monday.

Future perfect → will have been + V3. Active & Passive Voice · Voice in tenses

English MCQ · More English: Active & Passive Voice MCQs · Practise