Present participle; Past participle - curdling - curdled Present - curdle - curdle - curdles - curdle - curdle - curdle Past - curdled - curdled - curdled - curdled - curdled - curdled Future - will curdle - will curdle - will curdle - will curdle - will curdle - will curdle Present conditional - would curdle - would curdle - would curdle - would curdle - would curdle - would curdle Present Perfect - have curdled - have curdled - has curdled - have curdled - have curdled - have curdled Past Perfect - had curdled - had curdled - had curdled - had curdled - had curdled - had curdled Future Perfect - will have curdled - will have curdled - will have curdled - will have curdled - will have curdled - will have curdled Past conditional - would have curdled - would have curdled - would have curdled - would have curdled - would have curdled - would have curdled Imperative - - - curdle - - - - - - - -