Present participle; Past participle - buttering - buttered Present - butter - butter - butters - butter - butter - butter Past - buttered - buttered - buttered - buttered - buttered - buttered Future - will butter - will butter - will butter - will butter - will butter - will butter Present conditional - would butter - would butter - would butter - would butter - would butter - would butter Present Perfect - have buttered - have buttered - has buttered - have buttered - have buttered - have buttered Past Perfect - had buttered - had buttered - had buttered - had buttered - had buttered - had buttered Future Perfect - will have buttered - will have buttered - will have buttered - will have buttered - will have buttered - will have buttered Past conditional - would have buttered - would have buttered - would have buttered - would have buttered - would have buttered - would have buttered Imperative - - - butter - - - - - - - -