Present participle; Past participle - fissioning - fissioned Present - fission - fission - fissions - fission - fission - fission Past - fissioned - fissioned - fissioned - fissioned - fissioned - fissioned Future - will fission - will fission - will fission - will fission - will fission - will fission Present conditional - would fission - would fission - would fission - would fission - would fission - would fission Present Perfect - have fissioned - have fissioned - has fissioned - have fissioned - have fissioned - have fissioned Past Perfect - had fissioned - had fissioned - had fissioned - had fissioned - had fissioned - had fissioned Future Perfect - will have fissioned - will have fissioned - will have fissioned - will have fissioned - will have fissioned - will have fissioned Past conditional - would have fissioned - would have fissioned - would have fissioned - would have fissioned - would have fissioned - would have fissioned Imperative - - - fission - - - - - - - -