Present participle; Past participle - checkering - checkered Present - checker - checker - checkers - checker - checker - checker Past - checkered - checkered - checkered - checkered - checkered - checkered Future - will checker - will checker - will checker - will checker - will checker - will checker Present conditional - would checker - would checker - would checker - would checker - would checker - would checker Present Perfect - have checkered - have checkered - has checkered - have checkered - have checkered - have checkered Past Perfect - had checkered - had checkered - had checkered - had checkered - had checkered - had checkered Future Perfect - will have checkered - will have checkered - will have checkered - will have checkered - will have checkered - will have checkered Past conditional - would have checkered - would have checkered - would have checkered - would have checkered - would have checkered - would have checkered Imperative - - - checker - - - - - - - -