Present participle; Past participle - staffing - staffed Present - staff - staff - staffs - staff - staff - staff Past - staffed - staffed - staffed - staffed - staffed - staffed Future - will staff - will staff - will staff - will staff - will staff - will staff Present conditional - would staff - would staff - would staff - would staff - would staff - would staff Present Perfect - have staffed - have staffed - has staffed - have staffed - have staffed - have staffed Past Perfect - had staffed - had staffed - had staffed - had staffed - had staffed - had staffed Future Perfect - will have staffed - will have staffed - will have staffed - will have staffed - will have staffed - will have staffed Past conditional - would have staffed - would have staffed - would have staffed - would have staffed - would have staffed - would have staffed Imperative - - - staff - - - - - - - -