Future Perfect Tense in English Grammar
e) Interrogative-cum-Negative in Future Perfect Tense in English Grammar
W/H-Word → Shall/Will → Subject → Have → 3rd form of Verb (V3) → Object.
Why shall we not have cooked meal?
When Shall I not have stopped the car by applying brakes?
How will they not have finished their work?
Where will she not have displayed her pictures?