Present participle; Past participle - certificating - certificated Present - certificate - certificate - certificates - certificate - certificate - certificate Past - certificated - certificated - certificated - certificated - certificated - certificated Future - will certificate - will certificate - will certificate - will certificate - will certificate - will certificate Present conditional - would certificate - would certificate - would certificate - would certificate - would certificate - would certificate Present Perfect - have certificated - have certificated - has certificated - have certificated - have certificated - have certificated Past Perfect - had certificated - had certificated - had certificated - had certificated - had certificated - had certificated Future Perfect - will have certificated - will have certificated - will have certificated - will have certificated - will have certificated - will have certificated Past conditional - would have certificated - would have certificated - would have certificated - would have certificated - would have certificated - would have certificated Imperative - - - certificate - - - - - - - -