Present participle; Past participle - harming - harmed Present - harm - harm - harms - harm - harm - harm Past - harmed - harmed - harmed - harmed - harmed - harmed Future - will harm - will harm - will harm - will harm - will harm - will harm Present conditional - would harm - would harm - would harm - would harm - would harm - would harm Present Perfect - have harmed - have harmed - has harmed - have harmed - have harmed - have harmed Past Perfect - had harmed - had harmed - had harmed - had harmed - had harmed - had harmed Future Perfect - will have harmed - will have harmed - will have harmed - will have harmed - will have harmed - will have harmed Past conditional - would have harmed - would have harmed - would have harmed - would have harmed - would have harmed - would have harmed Imperative - - - harm - - - - - - - -