Present participle; Past participle - startling - startled Present - startle - startle - startles - startle - startle - startle Past - startled - startled - startled - startled - startled - startled Future - will startle - will startle - will startle - will startle - will startle - will startle Present conditional - would startle - would startle - would startle - would startle - would startle - would startle Present Perfect - have startled - have startled - has startled - have startled - have startled - have startled Past Perfect - had startled - had startled - had startled - had startled - had startled - had startled Future Perfect - will have startled - will have startled - will have startled - will have startled - will have startled - will have startled Past conditional - would have startled - would have startled - would have startled - would have startled - would have startled - would have startled Imperative - - - startle - - - - - - - -