Present participle; Past participle - impeding - impeded Present - impede - impede - impedes - impede - impede - impede Past - impeded - impeded - impeded - impeded - impeded - impeded Future - will impede - will impede - will impede - will impede - will impede - will impede Present conditional - would impede - would impede - would impede - would impede - would impede - would impede Present Perfect - have impeded - have impeded - has impeded - have impeded - have impeded - have impeded Past Perfect - had impeded - had impeded - had impeded - had impeded - had impeded - had impeded Future Perfect - will have impeded - will have impeded - will have impeded - will have impeded - will have impeded - will have impeded Past conditional - would have impeded - would have impeded - would have impeded - would have impeded - would have impeded - would have impeded Imperative - - - impede - - - - - - - -