Present participle; Past participle - caverning - caverned Present - cavern - cavern - caverns - cavern - cavern - cavern Past - caverned - caverned - caverned - caverned - caverned - caverned Future - will cavern - will cavern - will cavern - will cavern - will cavern - will cavern Present conditional - would cavern - would cavern - would cavern - would cavern - would cavern - would cavern Present Perfect - have caverned - have caverned - has caverned - have caverned - have caverned - have caverned Past Perfect - had caverned - had caverned - had caverned - had caverned - had caverned - had caverned Future Perfect - will have caverned - will have caverned - will have caverned - will have caverned - will have caverned - will have caverned Past conditional - would have caverned - would have caverned - would have caverned - would have caverned - would have caverned - would have caverned Imperative - - - cavern - - - - - - - -