Present participle; Past participle - interspacing - interspaced Present - interspace - interspace - interspaces - interspace - interspace - interspace Past - interspaced - interspaced - interspaced - interspaced - interspaced - interspaced Future - will interspace - will interspace - will interspace - will interspace - will interspace - will interspace Present conditional - would interspace - would interspace - would interspace - would interspace - would interspace - would interspace Present Perfect - have interspaced - have interspaced - has interspaced - have interspaced - have interspaced - have interspaced Past Perfect - had interspaced - had interspaced - had interspaced - had interspaced - had interspaced - had interspaced Future Perfect - will have interspaced - will have interspaced - will have interspaced - will have interspaced - will have interspaced - will have interspaced Past conditional - would have interspaced - would have interspaced - would have interspaced - would have interspaced - would have interspaced - would have interspaced Imperative - - - interspace - - - - - - - -