Present participle; Past participle - locking - locked Present - lock - lock - locks - lock - lock - lock Past - locked - locked - locked - locked - locked - locked Future - will lock - will lock - will lock - will lock - will lock - will lock Present conditional - would lock - would lock - would lock - would lock - would lock - would lock Present Perfect - have locked - have locked - has locked - have locked - have locked - have locked Past Perfect - had locked - had locked - had locked - had locked - had locked - had locked Future Perfect - will have locked - will have locked - will have locked - will have locked - will have locked - will have locked Past conditional - would have locked - would have locked - would have locked - would have locked - would have locked - would have locked Imperative - - - lock - - - - - - - -