Present participle; Past participle - rival(l)ing - rival(l)ed Present - rival - rival - rivals - rival - rival - rival Past - rival(l)ed - rival(l)ed - rival(l)ed - rival(l)ed - rival(l)ed - rival(l)ed Future - will rival - will rival - will rival - will rival - will rival - will rival Present conditional - would rival - would rival - would rival - would rival - would rival - would rival Present Perfect - have rival(l)ed - have rival(l)ed - has rival(l)ed - have rival(l)ed - have rival(l)ed - have rival(l)ed Past Perfect - had rival(l)ed - had rival(l)ed - had rival(l)ed - had rival(l)ed - had rival(l)ed - had rival(l)ed Future Perfect - will have rival(l)ed - will have rival(l)ed - will have rival(l)ed - will have rival(l)ed - will have rival(l)ed - will have rival(l)ed Past conditional - would have rival(l)ed - would have rival(l)ed - would have rival(l)ed - would have rival(l)ed - would have rival(l)ed - would have rival(l)ed Imperative - - - rival - - - - - - - -