Present participle; Past participle - tacking - tacked Present - tack - tack - tacks - tack - tack - tack Past - tacked - tacked - tacked - tacked - tacked - tacked Future - will tack - will tack - will tack - will tack - will tack - will tack Present conditional - would tack - would tack - would tack - would tack - would tack - would tack Present Perfect - have tacked - have tacked - has tacked - have tacked - have tacked - have tacked Past Perfect - had tacked - had tacked - had tacked - had tacked - had tacked - had tacked Future Perfect - will have tacked - will have tacked - will have tacked - will have tacked - will have tacked - will have tacked Past conditional - would have tacked - would have tacked - would have tacked - would have tacked - would have tacked - would have tacked Imperative - - - tack - - - - - - - -