Present participle; Past participle - complicating - complicated Present - complicate - complicate - complicates - complicate - complicate - complicate Past - complicated - complicated - complicated - complicated - complicated - complicated Future - will complicate - will complicate - will complicate - will complicate - will complicate - will complicate Present conditional - would complicate - would complicate - would complicate - would complicate - would complicate - would complicate Present Perfect - have complicated - have complicated - has complicated - have complicated - have complicated - have complicated Past Perfect - had complicated - had complicated - had complicated - had complicated - had complicated - had complicated Future Perfect - will have complicated - will have complicated - will have complicated - will have complicated - will have complicated - will have complicated Past conditional - would have complicated - would have complicated - would have complicated - would have complicated - would have complicated - would have complicated Imperative - - - complicate - - - - - - - -