Present participle; Past participle - burbling - burbled Present - burble - burble - burbles - burble - burble - burble Past - burbled - burbled - burbled - burbled - burbled - burbled Future - will burble - will burble - will burble - will burble - will burble - will burble Present conditional - would burble - would burble - would burble - would burble - would burble - would burble Present Perfect - have burbled - have burbled - has burbled - have burbled - have burbled - have burbled Past Perfect - had burbled - had burbled - had burbled - had burbled - had burbled - had burbled Future Perfect - will have burbled - will have burbled - will have burbled - will have burbled - will have burbled - will have burbled Past conditional - would have burbled - would have burbled - would have burbled - would have burbled - would have burbled - would have burbled Imperative - - - burble - - - - - - - -