Present participle; Past participle - reddening - reddened Present - redden - redden - reddens - redden - redden - redden Past - reddened - reddened - reddened - reddened - reddened - reddened Future - will redden - will redden - will redden - will redden - will redden - will redden Present conditional - would redden - would redden - would redden - would redden - would redden - would redden Present Perfect - have reddened - have reddened - has reddened - have reddened - have reddened - have reddened Past Perfect - had reddened - had reddened - had reddened - had reddened - had reddened - had reddened Future Perfect - will have reddened - will have reddened - will have reddened - will have reddened - will have reddened - will have reddened Past conditional - would have reddened - would have reddened - would have reddened - would have reddened - would have reddened - would have reddened Imperative - - - redden - - - - - - - -