Present participle; Past participle - interfering - interfered Present - interfere - interfere - interferes - interfere - interfere - interfere Past - interfered - interfered - interfered - interfered - interfered - interfered Future - will interfere - will interfere - will interfere - will interfere - will interfere - will interfere Present conditional - would interfere - would interfere - would interfere - would interfere - would interfere - would interfere Present Perfect - have interfered - have interfered - has interfered - have interfered - have interfered - have interfered Past Perfect - had interfered - had interfered - had interfered - had interfered - had interfered - had interfered Future Perfect - will have interfered - will have interfered - will have interfered - will have interfered - will have interfered - will have interfered Past conditional - would have interfered - would have interfered - would have interfered - would have interfered - would have interfered - would have interfered Imperative - - - interfere - - - - - - - -