Present participle; Past participle - expiring - expired Present - expire - expire - expires - expire - expire - expire Past - expired - expired - expired - expired - expired - expired Future - will expire - will expire - will expire - will expire - will expire - will expire Present conditional - would expire - would expire - would expire - would expire - would expire - would expire Present Perfect - have expired - have expired - has expired - have expired - have expired - have expired Past Perfect - had expired - had expired - had expired - had expired - had expired - had expired Future Perfect - will have expired - will have expired - will have expired - will have expired - will have expired - will have expired Past conditional - would have expired - would have expired - would have expired - would have expired - would have expired - would have expired Imperative - - - expire - - - - - - - -