Present participle; Past participle - shackling - shackled Present - shackle - shackle - shackles - shackle - shackle - shackle Past - shackled - shackled - shackled - shackled - shackled - shackled Future - will shackle - will shackle - will shackle - will shackle - will shackle - will shackle Present conditional - would shackle - would shackle - would shackle - would shackle - would shackle - would shackle Present Perfect - have shackled - have shackled - has shackled - have shackled - have shackled - have shackled Past Perfect - had shackled - had shackled - had shackled - had shackled - had shackled - had shackled Future Perfect - will have shackled - will have shackled - will have shackled - will have shackled - will have shackled - will have shackled Past conditional - would have shackled - would have shackled - would have shackled - would have shackled - would have shackled - would have shackled Imperative - - - shackle - - - - - - - -