Present participle; Past participle - subpenaing - subpenaed Present - subpena - subpena - subpenas - subpena - subpena - subpena Past - subpenaed - subpenaed - subpenaed - subpenaed - subpenaed - subpenaed Future - will subpena - will subpena - will subpena - will subpena - will subpena - will subpena Present conditional - would subpena - would subpena - would subpena - would subpena - would subpena - would subpena Present Perfect - have subpenaed - have subpenaed - has subpenaed - have subpenaed - have subpenaed - have subpenaed Past Perfect - had subpenaed - had subpenaed - had subpenaed - had subpenaed - had subpenaed - had subpenaed Future Perfect - will have subpenaed - will have subpenaed - will have subpenaed - will have subpenaed - will have subpenaed - will have subpenaed Past conditional - would have subpenaed - would have subpenaed - would have subpenaed - would have subpenaed - would have subpenaed - would have subpenaed Imperative - - - subpena - - - - - - - -