Present participle; Past participle - overestimating - overestimated Present - overestimate - overestimate - overestimates - overestimate - overestimate - overestimate Past - overestimated - overestimated - overestimated - overestimated - overestimated - overestimated Future - will overestimate - will overestimate - will overestimate - will overestimate - will overestimate - will overestimate Present conditional - would overestimate - would overestimate - would overestimate - would overestimate - would overestimate - would overestimate Present Perfect - have overestimated - have overestimated - has overestimated - have overestimated - have overestimated - have overestimated Past Perfect - had overestimated - had overestimated - had overestimated - had overestimated - had overestimated - had overestimated Future Perfect - will have overestimated - will have overestimated - will have overestimated - will have overestimated - will have overestimated - will have overestimated Past conditional - would have overestimated - would have overestimated - would have overestimated - would have overestimated - would have overestimated - would have overestimated Imperative - - - overestimate - - - - - - - -