Present participle; Past participle - lumping - lumped Present - lump - lump - lumps - lump - lump - lump Past - lumped - lumped - lumped - lumped - lumped - lumped Future - will lump - will lump - will lump - will lump - will lump - will lump Present conditional - would lump - would lump - would lump - would lump - would lump - would lump Present Perfect - have lumped - have lumped - has lumped - have lumped - have lumped - have lumped Past Perfect - had lumped - had lumped - had lumped - had lumped - had lumped - had lumped Future Perfect - will have lumped - will have lumped - will have lumped - will have lumped - will have lumped - will have lumped Past conditional - would have lumped - would have lumped - would have lumped - would have lumped - would have lumped - would have lumped Imperative - - - lump - - - - - - - -