Present participle; Past participle - booing - booed Present - boo - boo - boos - boo - boo - boo Past - booed - booed - booed - booed - booed - booed Future - will boo - will boo - will boo - will boo - will boo - will boo Present conditional - would boo - would boo - would boo - would boo - would boo - would boo Present Perfect - have booed - have booed - has booed - have booed - have booed - have booed Past Perfect - had booed - had booed - had booed - had booed - had booed - had booed Future Perfect - will have booed - will have booed - will have booed - will have booed - will have booed - will have booed Past conditional - would have booed - would have booed - would have booed - would have booed - would have booed - would have booed Imperative - - - boo - - - - - - - -