Present participle; Past participle - clerking - clerked Present - clerk - clerk - clerks - clerk - clerk - clerk Past - clerked - clerked - clerked - clerked - clerked - clerked Future - will clerk - will clerk - will clerk - will clerk - will clerk - will clerk Present conditional - would clerk - would clerk - would clerk - would clerk - would clerk - would clerk Present Perfect - have clerked - have clerked - has clerked - have clerked - have clerked - have clerked Past Perfect - had clerked - had clerked - had clerked - had clerked - had clerked - had clerked Future Perfect - will have clerked - will have clerked - will have clerked - will have clerked - will have clerked - will have clerked Past conditional - would have clerked - would have clerked - would have clerked - would have clerked - would have clerked - would have clerked Imperative - - - clerk - - - - - - - -