For negation, why not copy English on this? A negative auxiliary verb analogous to "don't" transparently formed from an older negative particle, used in some TAM classes, with that same negative particle (let's say its ga to be concrete) used for negation in other TAM contexts?
“And now, a hushed crowd nervously awaits the final decision of the judge: is Microsoft Excel in fact the most powerful spreadsheet for powerful computers? Will it solidify the new machine’s place in world business? Will it resurrect the art of financial presentation? Is it the irresistable force that will lead us into the future, away from—” “REBOOT, SCHUMINSKY.”