Present participle; Past participle - defining - defined Present - define - define - defines - define - define - define Past - defined - defined - defined - defined - defined - defined Future - will define - will define - will define - will define - will define - will define Present conditional - would define - would define - would define - would define - would define - would define Present Perfect - have defined - have defined - has defined - have defined - have defined - have defined Past Perfect - had defined - had defined - had defined - had defined - had defined - had defined Future Perfect - will have defined - will have defined - will have defined - will have defined - will have defined - will have defined Past conditional - would have defined - would have defined - would have defined - would have defined - would have defined - would have defined Imperative - - - define - - - - - - - -