Present participle; Past participle - underrating - underrated Present - underrate - underrate - underrates - underrate - underrate - underrate Past - underrated - underrated - underrated - underrated - underrated - underrated Future - will underrate - will underrate - will underrate - will underrate - will underrate - will underrate Present conditional - would underrate - would underrate - would underrate - would underrate - would underrate - would underrate Present Perfect - have underrated - have underrated - has underrated - have underrated - have underrated - have underrated Past Perfect - had underrated - had underrated - had underrated - had underrated - had underrated - had underrated Future Perfect - will have underrated - will have underrated - will have underrated - will have underrated - will have underrated - will have underrated Past conditional - would have underrated - would have underrated - would have underrated - would have underrated - would have underrated - would have underrated Imperative - - - underrate - - - - - - - -