Present participle; Past participle - surmising - surmised Present - surmise - surmise - surmises - surmise - surmise - surmise Past - surmised - surmised - surmised - surmised - surmised - surmised Future - will surmise - will surmise - will surmise - will surmise - will surmise - will surmise Present conditional - would surmise - would surmise - would surmise - would surmise - would surmise - would surmise Present Perfect - have surmised - have surmised - has surmised - have surmised - have surmised - have surmised Past Perfect - had surmised - had surmised - had surmised - had surmised - had surmised - had surmised Future Perfect - will have surmised - will have surmised - will have surmised - will have surmised - will have surmised - will have surmised Past conditional - would have surmised - would have surmised - would have surmised - would have surmised - would have surmised - would have surmised Imperative - - - surmise - - - - - - - -