Present participle; Past participle - invalidating - invalidated Present - invalidate - invalidate - invalidates - invalidate - invalidate - invalidate Past - invalidated - invalidated - invalidated - invalidated - invalidated - invalidated Future - will invalidate - will invalidate - will invalidate - will invalidate - will invalidate - will invalidate Present conditional - would invalidate - would invalidate - would invalidate - would invalidate - would invalidate - would invalidate Present Perfect - have invalidated - have invalidated - has invalidated - have invalidated - have invalidated - have invalidated Past Perfect - had invalidated - had invalidated - had invalidated - had invalidated - had invalidated - had invalidated Future Perfect - will have invalidated - will have invalidated - will have invalidated - will have invalidated - will have invalidated - will have invalidated Past conditional - would have invalidated - would have invalidated - would have invalidated - would have invalidated - would have invalidated - would have invalidated Imperative - - - invalidate - - - - - - - -