Present participle; Past participle - grinding - ground Present - grind - grind - grinds - grind - grind - grind Past - ground - ground - ground - ground - ground - ground Future - will grind - will grind - will grind - will grind - will grind - will grind Present conditional - would grind - would grind - would grind - would grind - would grind - would grind Present Perfect - have ground - have ground - has ground - have ground - have ground - have ground Past Perfect - had ground - had ground - had ground - had ground - had ground - had ground Future Perfect - will have ground - will have ground - will have ground - will have ground - will have ground - will have ground Past conditional - would have ground - would have ground - would have ground - would have ground - would have ground - would have ground Imperative - - - grind - - - - - - - -