Present participle; Past participle - chalking - chalked Present - chalk - chalk - chalks - chalk - chalk - chalk Past - chalked - chalked - chalked - chalked - chalked - chalked Future - will chalk - will chalk - will chalk - will chalk - will chalk - will chalk Present conditional - would chalk - would chalk - would chalk - would chalk - would chalk - would chalk Present Perfect - have chalked - have chalked - has chalked - have chalked - have chalked - have chalked Past Perfect - had chalked - had chalked - had chalked - had chalked - had chalked - had chalked Future Perfect - will have chalked - will have chalked - will have chalked - will have chalked - will have chalked - will have chalked Past conditional - would have chalked - would have chalked - would have chalked - would have chalked - would have chalked - would have chalked Imperative - - - chalk - - - - - - - -