Present participle; Past participle - rumbling - rumbled Present - rumble - rumble - rumbles - rumble - rumble - rumble Past - rumbled - rumbled - rumbled - rumbled - rumbled - rumbled Future - will rumble - will rumble - will rumble - will rumble - will rumble - will rumble Present conditional - would rumble - would rumble - would rumble - would rumble - would rumble - would rumble Present Perfect - have rumbled - have rumbled - has rumbled - have rumbled - have rumbled - have rumbled Past Perfect - had rumbled - had rumbled - had rumbled - had rumbled - had rumbled - had rumbled Future Perfect - will have rumbled - will have rumbled - will have rumbled - will have rumbled - will have rumbled - will have rumbled Past conditional - would have rumbled - would have rumbled - would have rumbled - would have rumbled - would have rumbled - would have rumbled Imperative - - - rumble - - - - - - - -