Present participle; Past participle - trellising - trellised Present - trellis - trellis - trellises - trellis - trellis - trellis Past - trellised - trellised - trellised - trellised - trellised - trellised Future - will trellis - will trellis - will trellis - will trellis - will trellis - will trellis Present conditional - would trellis - would trellis - would trellis - would trellis - would trellis - would trellis Present Perfect - have trellised - have trellised - has trellised - have trellised - have trellised - have trellised Past Perfect - had trellised - had trellised - had trellised - had trellised - had trellised - had trellised Future Perfect - will have trellised - will have trellised - will have trellised - will have trellised - will have trellised - will have trellised Past conditional - would have trellised - would have trellised - would have trellised - would have trellised - would have trellised - would have trellised Imperative - - - trellis - - - - - - - -