Present participle; Past participle - unfastening - unfastened Present - unfasten - unfasten - unfastens - unfasten - unfasten - unfasten Past - unfastened - unfastened - unfastened - unfastened - unfastened - unfastened Future - will unfasten - will unfasten - will unfasten - will unfasten - will unfasten - will unfasten Present conditional - would unfasten - would unfasten - would unfasten - would unfasten - would unfasten - would unfasten Present Perfect - have unfastened - have unfastened - has unfastened - have unfastened - have unfastened - have unfastened Past Perfect - had unfastened - had unfastened - had unfastened - had unfastened - had unfastened - had unfastened Future Perfect - will have unfastened - will have unfastened - will have unfastened - will have unfastened - will have unfastened - will have unfastened Past conditional - would have unfastened - would have unfastened - would have unfastened - would have unfastened - would have unfastened - would have unfastened Imperative - - - unfasten - - - - - - - -