Present participle; Past participle - towering - towered Present - tower - tower - towers - tower - tower - tower Past - towered - towered - towered - towered - towered - towered Future - will tower - will tower - will tower - will tower - will tower - will tower Present conditional - would tower - would tower - would tower - would tower - would tower - would tower Present Perfect - have towered - have towered - has towered - have towered - have towered - have towered Past Perfect - had towered - had towered - had towered - had towered - had towered - had towered Future Perfect - will have towered - will have towered - will have towered - will have towered - will have towered - will have towered Past conditional - would have towered - would have towered - would have towered - would have towered - would have towered - would have towered Imperative - - - tower - - - - - - - -