Present participle; Past participle - discoloring - discolored Present - discolor - discolor - discolors - discolor - discolor - discolor Past - discolored - discolored - discolored - discolored - discolored - discolored Future - will discolor - will discolor - will discolor - will discolor - will discolor - will discolor Present conditional - would discolor - would discolor - would discolor - would discolor - would discolor - would discolor Present Perfect - have discolored - have discolored - has discolored - have discolored - have discolored - have discolored Past Perfect - had discolored - had discolored - had discolored - had discolored - had discolored - had discolored Future Perfect - will have discolored - will have discolored - will have discolored - will have discolored - will have discolored - will have discolored Past conditional - would have discolored - would have discolored - would have discolored - would have discolored - would have discolored - would have discolored Imperative - - - discolor - - - - - - - -