Present participle; Past participle - necessitating - necessitated Present - necessitate - necessitate - necessitates - necessitate - necessitate - necessitate Past - necessitated - necessitated - necessitated - necessitated - necessitated - necessitated Future - will necessitate - will necessitate - will necessitate - will necessitate - will necessitate - will necessitate Present conditional - would necessitate - would necessitate - would necessitate - would necessitate - would necessitate - would necessitate Present Perfect - have necessitated - have necessitated - has necessitated - have necessitated - have necessitated - have necessitated Past Perfect - had necessitated - had necessitated - had necessitated - had necessitated - had necessitated - had necessitated Future Perfect - will have necessitated - will have necessitated - will have necessitated - will have necessitated - will have necessitated - will have necessitated Past conditional - would have necessitated - would have necessitated - would have necessitated - would have necessitated - would have necessitated - would have necessitated Imperative - - - necessitate - - - - - - - -