Present participle; Past participle - hollowing - hollowed Present - hollow - hollow - hollows - hollow - hollow - hollow Past - hollowed - hollowed - hollowed - hollowed - hollowed - hollowed Future - will hollow - will hollow - will hollow - will hollow - will hollow - will hollow Present conditional - would hollow - would hollow - would hollow - would hollow - would hollow - would hollow Present Perfect - have hollowed - have hollowed - has hollowed - have hollowed - have hollowed - have hollowed Past Perfect - had hollowed - had hollowed - had hollowed - had hollowed - had hollowed - had hollowed Future Perfect - will have hollowed - will have hollowed - will have hollowed - will have hollowed - will have hollowed - will have hollowed Past conditional - would have hollowed - would have hollowed - would have hollowed - would have hollowed - would have hollowed - would have hollowed Imperative - - - hollow - - - - - - - -