Present participle; Past participle - rubbling - rubbled Present - rubble - rubble - rubbles - rubble - rubble - rubble Past - rubbled - rubbled - rubbled - rubbled - rubbled - rubbled Future - will rubble - will rubble - will rubble - will rubble - will rubble - will rubble Present conditional - would rubble - would rubble - would rubble - would rubble - would rubble - would rubble Present Perfect - have rubbled - have rubbled - has rubbled - have rubbled - have rubbled - have rubbled Past Perfect - had rubbled - had rubbled - had rubbled - had rubbled - had rubbled - had rubbled Future Perfect - will have rubbled - will have rubbled - will have rubbled - will have rubbled - will have rubbled - will have rubbled Past conditional - would have rubbled - would have rubbled - would have rubbled - would have rubbled - would have rubbled - would have rubbled Imperative - - - rubble - - - - - - - -