Present participle; Past participle - concurring - concurred Present - concur - concur - concurs - concur - concur - concur Past - concurred - concurred - concurred - concurred - concurred - concurred Future - will concur - will concur - will concur - will concur - will concur - will concur Present conditional - would concur - would concur - would concur - would concur - would concur - would concur Present Perfect - have concurred - have concurred - has concurred - have concurred - have concurred - have concurred Past Perfect - had concurred - had concurred - had concurred - had concurred - had concurred - had concurred Future Perfect - will have concurred - will have concurred - will have concurred - will have concurred - will have concurred - will have concurred Past conditional - would have concurred - would have concurred - would have concurred - would have concurred - would have concurred - would have concurred Imperative - - - concur - - - - - - - -