Present participle; Past participle - clashing - clashed Present - clash - clash - clashes - clash - clash - clash Past - clashed - clashed - clashed - clashed - clashed - clashed Future - will clash - will clash - will clash - will clash - will clash - will clash Present conditional - would clash - would clash - would clash - would clash - would clash - would clash Present Perfect - have clashed - have clashed - has clashed - have clashed - have clashed - have clashed Past Perfect - had clashed - had clashed - had clashed - had clashed - had clashed - had clashed Future Perfect - will have clashed - will have clashed - will have clashed - will have clashed - will have clashed - will have clashed Past conditional - would have clashed - would have clashed - would have clashed - would have clashed - would have clashed - would have clashed Imperative - - - clash - - - - - - - -